The total volume of gas inspired or expired per unit of time, usually measured in liters per minute.
The act of breathing with the LUNGS, consisting of INHALATION, or the taking into the lungs of the ambient air, and of EXHALATION, or the expelling of the modified air which contains more CARBON DIOXIDE than the air taken in (Blakiston's Gould Medical Dictionary, 4th ed.). This does not include tissue respiration (= OXYGEN CONSUMPTION) or cell respiration (= CELL RESPIRATION).
The exchange of OXYGEN and CARBON DIOXIDE between alveolar air and pulmonary capillary blood that occurs across the BLOOD-AIR BARRIER.
The ratio of alveolar ventilation to simultaneous alveolar capillary blood flow in any part of the lung. (Stedman, 25th ed)
A pulmonary ventilation rate faster than is metabolically necessary for the exchange of gases. It is the result of an increased frequency of breathing, an increased tidal volume, or a combination of both. It causes an excess intake of oxygen and the blowing off of carbon dioxide.
A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.
The physical or mechanical action of the LUNGS; DIAPHRAGM; RIBS; and CHEST WALL during respiration. It includes airflow, lung volume, neural and reflex controls, mechanoreceptors, breathing patterns, etc.
Cells specialized to detect chemical substances and relay that information centrally in the nervous system. Chemoreceptor cells may monitor external stimuli, as in TASTE and OLFACTION, or internal stimuli, such as the concentrations of OXYGEN and CARBON DIOXIDE in the blood.
A noble gas with the atomic symbol Xe, atomic number 54, and atomic weight 131.30. It is found in the earth's atmosphere and has been used as an anesthetic.
Supplying a building or house, their rooms and corridors, with fresh air. The controlling of the environment thus may be in public or domestic sites and in medical or non-medical locales. (From Dorland, 28th ed)
A clinical manifestation of abnormal increase in the amount of carbon dioxide in arterial blood.
Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.
Expenditure of energy during PHYSICAL ACTIVITY. Intensity of exertion may be measured by rate of OXYGEN CONSUMPTION; HEAT produced, or HEART RATE. Perceived exertion, a psychological measure of exertion, is included.
Any method of artificial breathing that employs mechanical or non-mechanical means to force the air into and out of the lungs. Artificial respiration or ventilation is used in individuals who have stopped breathing or have RESPIRATORY INSUFFICIENCY to increase their intake of oxygen (O2) and excretion of carbon dioxide (CO2).
The rate at which oxygen is used by a tissue; microliters of oxygen STPD used per milligram of tissue per hour; the rate at which oxygen enters the blood from alveolar gas, equal in the steady state to the consumption of oxygen by tissue metabolism throughout the body. (Stedman, 25th ed, p346)
An involuntary movement or exercise of function in a part, excited in response to a stimulus applied to the periphery and transmitted to the brain or spinal cord.
An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.
The number of times the HEART VENTRICLES contract per unit of time, usually per minute.
Ventilatory support system using frequencies from 60-900 cycles/min or more. Three types of systems have been distinguished on the basis of rates, volumes, and the system used. They are high frequency positive-pressure ventilation (HFPPV); HIGH-FREQUENCY JET VENTILATION; (HFJV); and high-frequency oscillation (HFO).
Application of positive pressure to the inspiratory phase when the patient has an artificial airway in place and is connected to a ventilator.
The volume of air inspired or expired during each normal, quiet respiratory cycle. Common abbreviations are TV or V with subscript T.
A method of mechanical ventilation in which pressure is maintained to increase the volume of gas remaining in the lungs at the end of expiration, thus reducing the shunting of blood through the lungs and improving gas exchange.
Controlled physical activity which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used.
Respiratory support system used primarily with rates of about 100 to 200/min with volumes of from about one to three times predicted anatomic dead space. Used to treat respiratory failure and maintain ventilation under severe circumstances.
Techniques for administering artificial respiration without the need for INTRATRACHEAL INTUBATION.
Physical activity which is usually regular and done with the intention of improving or maintaining PHYSICAL FITNESS or HEALTH. Contrast with PHYSICAL EXERTION which is concerned largely with the physiologic and metabolic response to energy expenditure.
Techniques for effecting the transition of the respiratory-failure patient from mechanical ventilation to spontaneous ventilation, while meeting the criteria that tidal volume be above a given threshold (greater than 5 ml/kg), respiratory frequency be below a given count (less than 30 breaths/min), and oxygen partial pressure be above a given threshold (PaO2 greater than 50mm Hg). Weaning studies focus on finding methods to monitor and predict the outcome of mechanical ventilator weaning as well as finding ventilatory support techniques which will facilitate successful weaning. Present methods include intermittent mandatory ventilation, intermittent positive pressure ventilation, and mandatory minute volume ventilation.
Mechanical devices used to produce or assist pulmonary ventilation.
A procedure involving placement of a tube into the trachea through the mouth or nose in order to provide a patient with oxygen and anesthesia.
A syndrome characterized by progressive life-threatening RESPIRATORY INSUFFICIENCY in the absence of known LUNG DISEASES, usually following a systemic insult such as surgery or major TRAUMA.
Lung damage that is caused by the adverse effects of PULMONARY VENTILATOR usage. The high frequency and tidal volumes produced by a mechanical ventilator can cause alveolar disruption and PULMONARY EDEMA.
RESPIRATORY MUSCLE contraction during INHALATION. The work is accomplished in three phases: LUNG COMPLIANCE work, that required to expand the LUNGS against its elastic forces; tissue resistance work, that required to overcome the viscosity of the lung and chest wall structures; and AIRWAY RESISTANCE work, that required to overcome airway resistance during the movement of air into the lungs. Work of breathing does not refer to expiration, which is entirely a passive process caused by elastic recoil of the lung and chest cage. (Guyton, Textbook of Medical Physiology, 8th ed, p406)
Measurement of oxygen and carbon dioxide in the blood.
The pressure that would be exerted by one component of a mixture of gases if it were present alone in a container. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
The capability of the LUNGS to distend under pressure as measured by pulmonary volume change per unit pressure change. While not a complete description of the pressure-volume properties of the lung, it is nevertheless useful in practice as a measure of the comparative stiffness of the lung. (From Best & Taylor's Physiological Basis of Medical Practice, 12th ed, p562)
Surgical formation of an opening into the trachea through the neck, or the opening so created.
Techniques for supplying artificial respiration to a single lung.
The force per unit area that the air exerts on any surface in contact with it. Primarily used for articles pertaining to air pressure within a closed environment.
Helium. A noble gas with the atomic symbol He, atomic number 2, and atomic weight 4.003. It is a colorless, odorless, tasteless gas that is not combustible and does not support combustion. It was first detected in the sun and is now obtained from natural gas. Medically it is used as a diluent for other gases, being especially useful with oxygen in the treatment of certain cases of respiratory obstruction, and as a vehicle for general anesthetics. (Dorland, 27th ed)
Hospital units providing continuous surveillance and care to acutely ill patients.
A type of oropharyngeal airway that provides an alternative to endotracheal intubation and standard mask anesthesia in certain patients. It is introduced into the hypopharynx to form a seal around the larynx thus permitting spontaneous or positive pressure ventilation without penetration of the larynx or esophagus. It is used in place of a facemask in routine anesthesia. The advantages over standard mask anesthesia are better airway control, minimal anesthetic gas leakage, a secure airway during patient transport to the recovery area, and minimal postoperative problems.
Body ventilators that assist ventilation by applying intermittent subatmospheric pressure around the thorax, abdomen, or airway and periodically expand the chest wall and inflate the lungs. They are relatively simple to operate and do not require tracheostomy. These devices include the tank ventilators ("iron lung"), Portalung, Pneumowrap, and chest cuirass ("tortoise shell").
A condition of the newborn marked by DYSPNEA with CYANOSIS, heralded by such prodromal signs as dilatation of the alae nasi, expiratory grunt, and retraction of the suprasternal notch or costal margins, mostly frequently occurring in premature infants, children of diabetic mothers, and infants delivered by cesarean section, and sometimes with no apparent predisposing cause.
Devices that cover the nose and mouth to maintain aseptic conditions or to administer inhaled anesthetics or other gases. (UMDNS, 1999)
Measure of the maximum amount of air that can be breathed in and blown out over a sustained interval such as 15 or 20 seconds. Common abbreviations are MVV and MBC.
Measurement of the various processes involved in the act of respiration: inspiration, expiration, oxygen and carbon dioxide exchange, lung volume and compliance, etc.
Measurement of the amount of air that the lungs may contain at various points in the respiratory cycle.
Advanced and highly specialized care provided to medical or surgical patients whose conditions are life-threatening and require comprehensive care and constant monitoring. It is usually administered in specially equipped units of a health care facility.
That part of the RESPIRATORY TRACT or the air within the respiratory tract that does not exchange OXYGEN and CARBON DIOXIDE with pulmonary capillary blood.
Relatively complete absence of oxygen in one or more tissues.
Surgical incision of the trachea.
Physiologically, the opposition to flow of air caused by the forces of friction. As a part of pulmonary function testing, it is the ratio of driving pressure to the rate of air flow.
The number of times an organism breathes with the lungs (RESPIRATION) per unit time, usually per minute.
A transient absence of spontaneous respiration.
Damage to any compartment of the lung caused by physical, chemical, or biological agents which characteristically elicit inflammatory reaction. These inflammatory reactions can either be acute and dominated by NEUTROPHILS, or chronic and dominated by LYMPHOCYTES and MACROPHAGES.
A reduction in the amount of air entering the pulmonary alveoli.
The musculofibrous partition that separates the THORACIC CAVITY from the ABDOMINAL CAVITY. Contraction of the diaphragm increases the volume of the thoracic cavity aiding INHALATION.
The posture of an individual lying face down.
Application of positive pressure to the inspiratory phase of spontaneous respiration.
Inhalation of oxygen aimed at restoring toward normal any pathophysiologic alterations of gas exchange in the cardiopulmonary system, as by the use of a respirator, nasal catheter, tent, chamber, or mask. (From Dorland, 27th ed & Stedman, 25th ed)
Physiological processes and properties of the RESPIRATORY SYSTEM as a whole or of any of its parts.
Unstable isotopes of krypton that decay or disintegrate emitting radiation. Kr atoms with atomic weights 74-77, 79, 81, 85, and 87-94 are radioactive krypton isotopes.
A condition of lung damage that is characterized by bilateral pulmonary infiltrates (PULMONARY EDEMA) rich in NEUTROPHILS, and in the absence of clinical HEART FAILURE. This can represent a spectrum of pulmonary lesions, endothelial and epithelial, due to numerous factors (physical, chemical, or biological).
The circulation of the BLOOD through the LUNGS.
These include the muscles of the DIAPHRAGM and the INTERCOSTAL MUSCLES.
A noble gas that is found in the atmosphere. It has the atomic symbol Kr, atomic number 36, atomic weight 83.80, and has been used in electric bulbs.
Absence of air in the entire or part of a lung, such as an incompletely inflated neonate lung or a collapsed adult lung. Pulmonary atelectasis can be caused by airway obstruction, lung compression, fibrotic contraction, or other factors.
Injury following pressure changes; includes injury to the eustachian tube, ear drum, lung and stomach.
Any hindrance to the passage of air into and out of the lungs.
A disease or state in which death is possible or imminent.
Removal of an endotracheal tube from the patient.
The volume of air remaining in the LUNGS at the end of a normal, quiet expiration. It is the sum of the RESIDUAL VOLUME and the EXPIRATORY RESERVE VOLUME. Common abbreviation is FRC.
Any disorder marked by obstruction of conducting airways of the lung. AIRWAY OBSTRUCTION may be acute, chronic, intermittent, or persistent.
An infant during the first month after birth.
The act of BREATHING in.
Procedure in which patients are induced into an unconscious state through use of various medications so that they do not feel pain during surgery.
Elements of limited time intervals, contributing to particular results or situations.
The maintenance of certain aspects of the environment within a defined space to facilitate the function of that space; aspects controlled include air temperature and motion, radiant heat level, moisture, and concentration of pollutants such as dust, microorganisms, and gases. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Excessive accumulation of extravascular fluid in the lung, an indication of a serious underlying disease or disorder. Pulmonary edema prevents efficient PULMONARY GAS EXCHANGE in the PULMONARY ALVEOLI, and can be life-threatening.
Pathological processes involving any part of the LUNG.
Mechanical ventilation delivered to match the patient's efforts in breathing as detected by the interactive ventilation device.
Health care provided to a critically ill patient during a medical emergency or crisis.
A general term encompassing lower MOTOR NEURON DISEASE; PERIPHERAL NERVOUS SYSTEM DISEASES; and certain MUSCULAR DISEASES. Manifestations include MUSCLE WEAKNESS; FASCICULATION; muscle ATROPHY; SPASM; MYOKYMIA; MUSCLE HYPERTONIA, myalgias, and MUSCLE HYPOTONIA.
Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.
The motion of air currents.
Ventilation of the middle ear in the treatment of secretory (serous) OTITIS MEDIA, usually by placement of tubes or grommets which pierce the TYMPANIC MEMBRANE.
Care of patients with deficiencies and abnormalities associated with the cardiopulmonary system. It includes the therapeutic use of medical gases and their administrative apparatus, environmental control systems, humidification, aerosols, ventilatory support, bronchopulmonary drainage and exercise, respiratory rehabilitation, assistance with cardiopulmonary resuscitation, and maintenance of natural, artificial, and mechanical airways.
A type of stress exerted uniformly in all directions. Its measure is the force exerted per unit area. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Small polyhedral outpouchings along the walls of the alveolar sacs, alveolar ducts and terminal bronchioles through the walls of which gas exchange between alveolar air and pulmonary capillary blood takes place.
Methods of creating machines and devices.
Hospital units providing continuous surveillance and care to acutely ill infants and children. Neonates are excluded since INTENSIVE CARE UNITS, NEONATAL is available.
Liquid perfluorinated carbon compounds which may or may not contain a hetero atom such as nitrogen, oxygen or sulfur, but do not contain another halogen or hydrogen atom. This concept includes fluorocarbon emulsions and fluorocarbon blood substitutes.
Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.
Serious INFLAMMATION of the LUNG in patients who required the use of PULMONARY VENTILATOR. It is usually caused by cross bacterial infections in hospitals (NOSOCOMIAL INFECTIONS).
A human infant born before 37 weeks of GESTATION.
Continuous recording of the carbon dioxide content of expired air.
An acronym for Acute Physiology and Chronic Health Evaluation, a scoring system using routinely collected data and providing an accurate, objective description for a broad range of intensive care unit admissions, measuring severity of illness in critically ill patients.
A disease of chronic diffuse irreversible airflow obstruction. Subcategories of COPD include CHRONIC BRONCHITIS and PULMONARY EMPHYSEMA.
The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.
A technique of respiratory therapy, in either spontaneously breathing or mechanically ventilated patients, in which airway pressure is maintained above atmospheric pressure throughout the respiratory cycle by pressurization of the ventilatory circuit. (On-Line Medical Dictionary [Internet]. Newcastle upon Tyne(UK): The University Dept. of Medical Oncology: The CancerWEB Project; c1997-2003 [cited 2003 Apr 17]. Available from: http://cancerweb.ncl.ac.uk/omd/)
The period of confinement of a patient to a hospital or other health facility.
Substances and drugs that lower the SURFACE TENSION of the mucoid layer lining the PULMONARY ALVEOLI.
Unstable isotopes of xenon that decay or disintegrate emitting radiation. Xe atoms with atomic weights 121-123, 125, 127, 133, 135, 137-145 are radioactive xenon isotopes.
Complete or severe weakness of the muscles of respiration. This condition may be associated with MOTOR NEURON DISEASES; PERIPHERAL NERVE DISEASES; NEUROMUSCULAR JUNCTION DISEASES; SPINAL CORD DISEASES; injury to the PHRENIC NERVE; and other disorders.
The continuous measurement of physiological processes, blood pressure, heart rate, renal output, reflexes, respiration, etc., in a patient or experimental animal; includes pharmacologic monitoring, the measurement of administered drugs or their metabolites in the blood, tissues, or urine.
The volume of air that is exhaled by a maximal expiration following a maximal inspiration.
Colloids with a gaseous dispersing phase and either liquid (fog) or solid (smoke) dispersed phase; used in fumigation or in inhalation therapy; may contain propellant agents.
The act of blowing a powder, vapor, or gas into any body cavity for experimental, diagnostic, or therapeutic purposes.
A chronic lung disease developed after OXYGEN INHALATION THERAPY or mechanical ventilation (VENTILATION, MECHANICAL) usually occurring in certain premature infants (INFANT, PREMATURE) or newborn infants with respiratory distress syndrome (RESPIRATORY DISTRESS SYNDROME, NEWBORN). Histologically, it is characterized by the unusual abnormalities of the bronchioles, such as METAPLASIA, decrease in alveolar number, and formation of CYSTS.
A measure of the amount of WATER VAPOR in the air.
A state characterized by loss of feeling or sensation. This depression of nerve function is usually the result of pharmacologic action and is induced to allow performance of surgery or other painful procedures.
Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.
The extra volume of air that can be expired with maximum effort beyond the level reached at the end of a normal, quiet expiration. Common abbreviation is ERV.
The volume of BLOOD passing through the HEART per unit of time. It is usually expressed as liters (volume) per minute so as not to be confused with STROKE VOLUME (volume per beat).
The administration of drugs by the respiratory route. It includes insufflation into the respiratory tract.
The act of BREATHING out.
Diseases of the respiratory system in general or unspecified or for a specific respiratory disease not available.
A respiratory distress syndrome in newborn infants, usually premature infants with insufficient PULMONARY SURFACTANTS. The disease is characterized by the formation of a HYALINE-like membrane lining the terminal respiratory airspaces (PULMONARY ALVEOLI) and subsequent collapse of the lung (PULMONARY ATELECTASIS).
Disease having a short and relatively severe course.

Factors influencing the deposition of inhaled particles. (1/1394)

Because the initial deposition pattern of inhaled particles of various toxic agents determines their future clearance and insult to tissue, respiratory tract deposition is important in assessing the potential toxicity of inhaled aerosols. Factors influencing the deposition of inhaled particles can be classified into three main areas: (1) the physics of aerosols, (2) the anatomy of the respiratory tract and (3) the airflow patterns in the lung airways. In the physics of aerosols, the forces acting on a particle and its physical and chemical properties, such as particle size or size distribution, density, shape, hygroscopic or hydrophobic character, and chemical reactions of the particle will affect the deposition. With respect to the anatomy of the respiratory tract, important parameters are the diameters, the lengths, and the branching angles of airway segments, which determine the deposition. Physiological factors include airflow and breathing patterns, which influence particle deposition. Various lung models used in predicting particle deposition are reviewed and discussed. The air-way structures of various animal species are compared, showing the unique structure of the human lung compared to the animal species under study. Regional deposition data in man and dog are reviewed. Recent deposition data for small rodents are presented, showing regional difference in deposition with the right apical lobe having the highest relative deposition.  (+info)

Particle deposition in the trachea: in vivo and in hollow casts. (2/1394)

The pattern of deposition within the respiratory tract of potentially harmful particulates is a major factor in assessing any risk from individual and community exposures. Although the trachea is the most easily observed of the conductive airways, very little information concerning its particle collection characteristics is available, information which is essential for a complete and realistic description of particle deposition patterns within the entire respiratory tract. Data on tracheal deposition are also needed for development of accurate predictive models for particle deposition. The pattern of particle deposition in the trachea, and its relation to air flow, was studied in a hollow cast of the human larynx-tracheobronchial tree. Results were compared with data obtained in humans in vivo and from previous studies in hollow casts. In addition, the relevance of tracheal deposition in the hollow cast test system to deposition in vivo was examined by a direct comparison of deposition in a cast prepared from the lungs of donkeys previously studied in a series of in vivo tests. The disturbance of the air flow within the trachea caused by the larynx promoted the deposition of suspended particulates throughout the length of the trachea, and especially in proximal regions. This proximal deposition was due both to direct impaction from the air jet coming from the glottis and to effects of the tubulent flow. Turbulence produced inhomogenous deposition patterns within the trachea for particles of all sizes, although its effect was more pronounced as size decreased. Tracheal deposition in the human cast was within the range of normal in vivo tracheal depostion only when a larynx was used during cast test exposures; this emphasizes the need for the use of realistic experimental test systems for the study of particle deposition patterns. The relative patterns of deposition in casts of the donkey trachea and in the same tracheas in vivo were similar.  (+info)

Pattern of total and regional lung function in subjects with bronchoconstriction induced by 15-me PGF2 alpha. (3/1394)

Closing volume (single breath nitrogen test), regional ventilation and perfusion (using intravenous xenon-133), and total lung function (TLC, VC, and FEV) were measured before and after intramuscular administration of 250 mug 15-methyl prostaglandin F2alpha (15-me PGF2alpha) in 10 healthy women. The cardiac output was measured with the Minnesota impedance cardiograph model 304A and the transthoracic impedance was used as an expression of the thoracic fluid volume. The slope of the alveolar plateau on the closing volume tracing showed a 271% increase 20 minutes after the prostaglandin administration, at which time the closing volume per cent (CV%) had decreased (P less than 0-01) and the closing capacity (CC%) had increased (P less than 0-05). Vital capacity (VC) decreased (P less than 0-01), residual volume (RV) increased (P less than 0-01), and the total lung capacity (TLC) remained unchanged. The maximal decrease (9%) in FEV1 was seen after 20 minutes. All these measurements except the slope of the alveolar plateau returned to control levels after 60 minutes. The redistribution of regional ventilation was more pronounced than that of the regional pulmonary blood flow. No change was observed in cardiac output and transthoracic impedance. None of the patients experienced any dyspnoea. Our results are consistent with a more pronounced effect of prostaglandin F2alpha on the small airways (the alveolar plateau) than on the larger airways (FEV1). In cases where an increase in the slope of the alveolar plateau is observed, the closing volume per cent should not be used as a measurement of the lung disease. It is concluded that the single breath nitrogen test (N2 closing volume) is more sensitive than the conventional tests.  (+info)

Effect on nasal resistance of an external nasal splint and isotonic exercise. (4/1394)

OBJECTIVES: The now commonplace wearing of external nasal splints by sportsmen and athletes has never been scientifically evaluated. The present study looks into the effect of isotonic exercise on nasal resistance, and examines whether this effect is altered by the wearing of an external nasal splint. METHODS: Twenty subjects not suffering from rhinitis were tested. Nasal resistance measurements were recorded using an anterior rhinomanometer before and after isotonic exercise with and without an external nasal splint. Pulse and blood pressure were measured before and after exercise. RESULTS: Significant changes were observed in pulse (p < 0.001) and both systolic (p < 0.002) and diastolic (p < 0.001) blood pressure in response to exercise. Significant differences were seen in nasal resistance when the splint was applied (p < 0.001) and after exercise (p < 0.003). No significant difference was observed after exercise when the splint was worn (p = 0.167). CONCLUSIONS: External nasal splints decrease nasal resistance at rest but are of little value during isotonic exercise.  (+info)

Cardiopulmonary responses of middle-aged men without cardiopulmonary disease to steady-rate positive and negative work performed on a cycle ergometer. (5/1394)

BACKGROUND AND PURPOSE: Understanding physiological responses to negative work allows therapists to be more knowledgeable when they prescribe this form of exercise. The physiological responses of 12 men without cardiopulmonary disease, aged 39 to 65 years (X=49.7, SD=9.3), to negative work (eccentric muscle contractions) and to positive work (concentric muscle contractions) were compared. SUBJECTS AND METHODS: Subjects performed the 2 types of work on a motorized cycle ergometer at pedaling frequencies of 35, 55, and 75 rpm with a constant power output of 60 W. Steady-rate values of oxygen consumption (VO2), heart rate (HR), minute ventilation (VE), tidal volume (VT), and breathing frequency (fb) were obtained during 6 test conditions (positive and negative work at each of the 3 pedaling frequencies). RESULTS: Values for all measures were greater during positive work than during negative work, except for fb. During positive work, values for all variables were greatest at 75 rpm, except for fb. During negative work, VO2 and HR were greater at 75 and 35 rpm than at 55 rpm, and VE and VT were greater at 75 rpm than at 55 rpm. Breathing frequency was not different among pedaling frequencies. CONCLUSION AND DISCUSSION: The results confirmed that negative work performed on a cycle ergometer is associated with low metabolic cost in older men without cardiopulmonary disease. Although VE was determined primarily by changes in VT during negative work, a comparable disproportionate increase in fb was observed at the start of negative work. Such changes in breathing patterns have implications for the prescription of negative work for patients with lung disease.  (+info)

Contribution of gular pumping to lung ventilation in monitor lizards. (6/1394)

A controversial hypothesis has proposed that lizards are subject to a speed-dependent axial constraint that prevents effective lung ventilation during moderate- and high-speed locomotion. This hypothesis has been challenged by results demonstrating that monitor lizards (genus Varanus) experience no axial constraint. Evidence presented here shows that, during locomotion, varanids use a positive pressure gular pump to assist lung ventilation. Disabling the gular pump reveals that the axial constraint is present in varanids but it is masked by gular pumping under normal conditions. These findings support the prediction that the axial constraint may be found in other tetrapods that breathe by costal aspiration and locomote with a lateral undulatory gait.  (+info)

Influence of immersion on respiratory requirements during 30-min cycling exercise. (7/1394)

Immersion is considered to facilitate exercise-based rehabilitation. However, the drag effect of moving limbs in water, likely to increase the respiratory requirements at exercise, is not mentioned in many reports. The energetic and ventilatory requirements of 30 min steady state cycling exercise performed by healthy male subjects in air and during immersion up to the xiphoid in 33 degrees C water were compared. In the first experimental series nine subjects exercised at the same 60% maximal oxygen consumption (V'O2,max) in air and water. In the two ambient conditions, ventilatory variables had similar values, but the ergometric setting had to be reduced during water immersion so that the workload rated only 69+/-20 W (mean+/-SD) in water versus 121+/-32 W (p<0.001) in air. In the second experimental series, the same ergometric work load (122 W) was achieved by nine subjects with an average V'O2 of 2,210+/-300 mL x min(-1) in air versus 2,868+/-268 mL x min(-1) in water (p<0.001). Resting water immersion caused a marked trend for decreasing vital capacity (p=0.06), but no modification of other ventilatory variables. During exercise at similar V'O2, the average values of minute ventilation (V'E), tidal volume (VT), respiratory frequency (fR), tidal inspiratory time (VT/tI) were not different between water and air. However, at similar ergometric workload, V'E, VT, fR, VT/tI and plasma lactate levels were significantly higher in water than in air. Such consequences of the drag effect of water upon limb movements have not been reported in previous studies relying on shorter exercise bouts. Thus, maintaining steady exercise levels in water either led to a decrease in the workload or required a 25% higher oxygen consumption than in air. These findings may be relevant to the prescription of water immersion rehabilitation programmes.  (+info)

Effects of chemical feedback on respiratory motor and ventilatory output during different modes of assisted mechanical ventilation. (8/1394)

The purpose of the study was to examine the effects of chemical feedback on respiratory motor and ventilatory output in conscious subjects ventilated on various modes of assisted mechanical ventilation. Seven subjects were connected to a ventilator and randomly ventilated on assist-volume control (AVC), pressure support (PS) or proportional assist ventilation (PAV). On each mode, the assist level was set to the highest comfortable level. Airway and oesophageal (Poes) pressures, tidal volume, respiratory frequency (fR) and end-tidal carbon dioxide tension (PET,CO2) were measured breath-by-breath. When the subjects were stable on each mode, the fraction of inspired carbon dioxide (FI,CO2) was increased stepwise, and changes in minute ventilation (V'E) and respiratory motor output, estimated by the pressure-time product of all the respiratory muscles per breath (PTPrm) and per minute (PTPminute), were observed. At zero FI,CO2, PTPminute/PET,CO2 did not differ between modes, while V'E/ PTPminute was significantly lower with PAV than that with PS and AVC. As a result V'E/PET,CO2 was significantly lower with PAV, preventing, unlike AVC and PS, a significant drop in PET,CO2. With PAV, independent of CO2, V'E/PTPminute remained constant, while it decreased significantly with increasing CO2 stimulus with PS and AVC. At high PET,CO2 respiratory effort was significantly lower with PAV than that with PS and AVC. In conclusion, the mode of mechanical ventilation modifies the effects of chemical feedback on respiratory motor and ventilatory output. At all carbon dioxide stimulus levels neuroventilatory coupling was better preserved with proportional assist ventilation than with pressure support and assist-volume control ventilation.  (+info)

Provided that EIT hardware and software are further developed to guarantee stable and undisturbed measurements in the ICU and that practical handling is improved, this non-invasive method may become a useful bedside monitoring tool of regional lung ventilation in critically ill infants.
Publikations-Datenbank der Fraunhofer Wissenschaftler und Institute: Aufsätze, Studien, Forschungsberichte, Konferenzbeiträge, Tagungsbände, Patente und Gebrauchsmuster
 Respiration - four distinct processes must happen  Pulmonary ventilation - moving air into and out of the lungs  External respiration - gas exchange between the lungs and the blood  Transport - transport of oxygen and carbon dioxide between the lungs and tissues  Internal respiration - gas exchange between systemic blood vessels and tissues
Grays synthesis of the seemingly divergent facts regarding the physiology of pulmonary ventilation is a strong case for the essentially cooperative nature of
Definition of Minute ventilation in the Financial Dictionary - by Free online English dictionary and encyclopedia. What is Minute ventilation? Meaning of Minute ventilation as a finance term. What does Minute ventilation mean in finance?
RATIONALE AND OBJECTIVES: Hyperpolarized (3)He magnetic resonance imaging (MRI) ventilation abnormalities are visible in ex-smokers without airflow limitation, but the clinical relevance of this is not well-understood. Our objective was to phenotype healthy ex-smokers with normal and abnormally elevated ventilation defect percent (VDP). MATERIALS AND METHODS: Sixty ex-smokers without airflow limitation provided written informed consent to (3)He MRI, computed tomography (CT), and pulmonary function tests in a single visit. (3)He MRI VDP and apparent diffusion coefficients (ADCs) were measured for whole-lung and each lung lobe as were CT measurements of emphysema (relative area [RA] with attenuation ≤-950 HU, RA950) and airway morphology (wall area percent [WA%], lumen area [LA] and LA normalized to body surface area [LA/BSA]). RESULTS: In 42 ex-smokers, there was abnormally elevated VDP and no significant differences for pulmonary function, RA950, or airway measurements compared to 18 ex-smokers with
As an asthma attack occurs, all of the airways do not respond uniformly. To understand what is going on, as a simplification, think of the lungs as containing two types of alveoli, one type with seriously deficient ventilation and the other with reasonably good ventilation.. Blood leaving the poorly ventilated alveoli will have a low PO2 and a high PCO2, as you would expect. As a result of the altered blood gases, the respiratory rate goes up to increase ventilation.. Now consider the good alveoli in which air can move in and out more or less normally. Ventilation is now above normal because of the altered blood gases due to the poorly ventilated alveoli. The resulting increased ventilation means the PCO2 in the blood leaving the good alveoli goes below normal. And this can compensate for the high PCO2 in the deficient alveoli. Increasing the ventilation in a healthy alveolus always means a further reduction in the PCO2.. But what about oxygen? Increasing ventilation increases the oxygen in the ...
A manual lung ventilation device and method suitable for acute manual respiratory resuscitation and lung ventilation of a person are disclosed. The manual lung ventilation device includes a nasal inte
BACKGROUND: The mechanisms underlying the excessive ventilatory response to exercise in patients with cardiac failure are still not fully understood. HYPOTHESIS: This study was undertaken to investigate the mechanisms behind exercise hyperpnea in pat
Hypoxic environments increase ventilation in animals. This helps to bring in more oxygen when environmental levels may be limited. With limited oxygen availability, the body turns to anaerobic metabolism, resulting in the production of lactate ions. These ions are known to indirectly stimulate breathing by lowering blood pH and were more recently discovered to directly…
Alveolar ventilation, Pulmonary ventilation, Respiratory minute volume, Air way resistance, Intra plural pressure, Pressure changes during inspiration and expiration
New York, Dec 5 (IANS) Airflow patterns inside a cars passenger cabin offers some suggestions for potentially reducing the risk of Covid-19 transmission
The American Society of Anesthesiologists is reminding anesthesiologists and providers that an important revision to the ASAs Standards for Basic Anesthetic Monitoring is set to go into effect on July 1.
Deneysel toksik siroz ve omentektomili siroz modellerinin sıçan ovaryum, fallop tüpleri ve uterusa etkilerinin histolojik olarak incelenmesi
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A pulmonary ventilation/perfusion scan involves two nuclear scan tests to measure breathing (ventilation) and circulation (perfusion) in all areas of the lungs.
In addition to proper insulation in your attic, there are other improvements you can make. Adding an attic fan can increase ventilation and provide benefits all year long, not just in the summer. While a whole house fan can help to provide ventilation throughout the home, an attic fan may be more appropriate for your situation. Ask your contractor if you arent sure.. Call the Hayden ventilation experts at ACI Northwest for more information about how to help weatherize your home for year round comfort and efficiency. To get you started, we have included some of the main ways that attic fans can improve overall home efficiency and prevent moisture problems in the home.. Creating more fresh air circulation in your attic not only helps cool the home in the summer, but it can also prevent moisture related damages. In a home that is already well-insulated and has plenty of ventilation, an attic fan will help with overall efficiency by helping to remove the hot air from the attic. In addition to ...
Coal mine longwall face ventilation is an important component of the overall mine ventilation system. Increases in the production rate due to higher capacity mining equipment tend to increase methane emission rates from the coal face, which must be diluted by the face ventilation with a minimal opportunity for assistance from additional control equipment (i.e., surface boreholes). Increases in pan
Acute beta-blocker withholding resulted in decreased ventilatory efficiency mostly from an increase of VCO2-independent regulation of V(E) and less likely from a change in ventilation/perfusion mismatching.
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Authors: Shankar Siva, Roshini Thomas, Jason Callahan, Nicholas Hardcastle, Daniel Pham, Tomas Kron, Rodney J Hicks, Michael P MacManus, David L Ball, Michael S Hofman
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Study Lung Ventilation flashcards from Mollie O's class online, or in Brainscape's iPhone or Android app. ✓ Learn faster with spaced repetition.
This years focus on ventilation means that we are in an even better position to advise our customers, especially in the coming winter months, about this important area. The wide variety of climate conditions across the European region means that it is vital that our staff are as well trained as possible to provide the most effective advice and support to our customers ...
Apnea is defined by the cessation of respiratory airflow. The length of time necessary to be qualified as a true apneic event has changed dramatically over the last few decades: 2 minutes in 1956, 1 minute in 1959, 30 seconds in 1970, and 20 seconds or shorter if associated with bradycardia or cyanosis in 1978.
THE RESPIRATORY SYSTEM. Chapter 22. RESPIRATION. The exchange of gases between the atmosphere, lungs, blood, and tissues. Respiration. Pulmonary ventilation =
We investigated changes in arterial PCO2 (PaCO2) and pulmonary ventilation (VE) in normal, carotid chemoreceptor-denervated, and hilar nerve-denervated ponies during intravenous lactic acid infusion at rest and treadmill exercise at 1.8 mph-5% grade (mild) and 1.8 mph-15% grade (moderate). Lactic acid, (0.5 M) infusion of 0.10, 0.13, and 0.20 ml.min-1.kg-1 ...
is the exchange of gas between the alveoli and the external environment. It can be measured as the volume of fresh air entering (and leaving) the alveoli each minute. Oxygen from the atmosphere enters the lungs through this ventilation and ...
Herewith a quick tutorial on the use and placement of the bifurcated, dual-balloon EZ-Blocker bronchial blocker. More videos on the DLT vs BB debate, the other blockers, and troubleshooting advice to follow. Comments welcomed as always!. ...
Ventilation and ductwork- Maybe one room in your home is always too cold or too hot..Most vents-ductwork may be a problem, Free Estimates
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Lung ventilation was mapped in seven healthy male Sprague-Dawley rats (433 ± 24 g) using hyperpolarized 129Xe magnetic resonance imaging (MRI) at 3.0 T, and validated with hyperpolarized 3He MRI under similar ventilator conditions. Ventilation maps were obtained using flip angle variation for offset of RF and relaxation (FAVOR) which is a multiple breath imaging technique that extracts the fractional ventilation parameter, r, on a pixel-by-pixel basis from the dynamic signal enhancement. r is defined as the fractional refreshment of gas per breath. Under the ventilator conditions used in this work, whole-lung measurements of fractional ventilation obtained using hyperpolarized 129Xe were not significantly different from those obtained using hyperpolarized 3He (p = 0.8125 by a Wilcoxon matched pairs test). Fractional ventilation gradients calculated in the superior/inferior (S/I) and anterior/posterior (A/P) directions obtained using hyperpolarized 129Xe were not significantly different from ...
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Looking for online definition of mandatory minute ventilation in the Medical Dictionary? mandatory minute ventilation explanation free. What is mandatory minute ventilation? Meaning of mandatory minute ventilation medical term. What does mandatory minute ventilation mean?
Francis,. I dont know if you are a member of the ACSM or have access to their journals, however, here are two peer-reviewed studies you might find of interest.. I am sure if you google the titles, the researchers names will come up with the study.. 1. Arterial Saturation During Maximal Exercise Depends upon Capacity to Increase Ventilation.. 2. A Comparision of Incremental Exercise Tests During Cyucle and Treadmill Ergometry.. Best to you.. ...
VQ Scans consist of two parts: Ventilation & Perfusion. Visit NorthShore for pulmonary ventilation-perfusion procedure details, and schedule your appointment.
A high-performance training top that provides maximum breathability and comfort during chilly trail runs, intense gym workouts and other active adventures, the Comet Lite Long Sleeve Crewe features a technical design with a sleek, flattering fit. The Comet features our lightweight jersey Cool-Lite™ fabric, an advanced blend of natural TENCEL®, stretchy LYCRA® and our Corespun fibers-nylon threads wrapped in merino wool for the ultimate combination of next-to-skin softness and durability. This highly breathable and odor resistant blend expertly manages moisture, and strategic panels of merino-blend eyelet mesh under the arms increase ventilation when youre working hard. Forward-set side seams and the raglan sleeve construction help eliminate chafing and improve comfort.
It involves inspiration and expiration: 1. Inspiration: It is a process by which fresh air enters the lungs. The diaphragm, intercostal muscles and abdominal muscles play an important role. (i)
Rationale: In asthma, airway inflammation, obstruction and reactivity may lead to ventilation heterogeneity; our understanding of this process is limited in asthmatic chi..
A disposable shielded device for producing aerosol having particles less than 2 microns in size from an aqueous colloidal suspension obtained from human serum albumen and labelled with 99m Technetium for use in scintigraphic imaging of pulmonary function. The device includes a nebulizing chamber having a membrane of 0.1 mm to about 0.01 mm in thickness and 40 mm to about 50 mm in diameter which nebulizes the labelled substance in response to ultrasound waves transmitted thereto.
Risks are about the same as for x-rays (radiation) and needle pricks.. No radiation is released from the scanner. Instead, it detects radiation and converts it into an image.. There is a small exposure to radiation from the radioisotope. The radioisotopes used during scans are short-lived. All of the radiation leaves the body in a few days. However, as with any radiation exposure, caution is advised for pregnant or breast-feeding women.. There is a slight risk for infection or bleeding at the site where the needle is inserted. The risk with perfusion scan is the same as with inserting an intravenous needle for any other purpose ...
Synonyms for abdominal displacement ventilation in Free Thesaurus. Antonyms for abdominal displacement ventilation. 10 synonyms for ventilation: conference, discussion, rap, airing, ventilating system, ventilation system, public discussion, breathing, external respiration.... What are synonyms for abdominal displacement ventilation?
Ventilation is a system of low vents, like soffit vents, and high vents, like ridge and gable vents. To achieve proper ventilation, outside air should enter the attic low at the attic perimeter and exit high near the attic ridge.. You must provide an air gap at the overhang (soffit) and eaves to control the accumulation of moisture. Continuous soffit vents in combination with other outlets (ridge vents, mushroom cap vents, and upper gable vents) will produce the maximum amount of attic intake ventilation. If your roof has minimal or non-existent overhangs, you may not be able to use soffit vents. Consider installing low gable vents located near the attic ceiling but above the top of the level of the attic ceiling insulation. ...
There are two main types of mechanical ventilation systems: the mixing ventilation (MV) and the displacement ventilation (DV). The aim of this work is
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Airmasters decentralised ventilation solutions keep the buildings energy consumption for ventilation to a minimum. Ventilation is only provided where and when it is needed. The intelligent, automatic control takes care of this. No energy is wasted for unnecessary ventilation.
The recently published BSRIA market intelligence study on World Ventilation: Fans and Ventilation Market shows that China is expected to outpace the growth experienced in European countries which signifies global opportunities. In China, the rude health of the residential sector meant that sales of fans and ventilation units experienced a brisk growth of 21 per […]. ...
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Naturally ventilated buildings can significantly reduce the required energy for cooling and ventilating buildings by drawing in outdoor air using non-mechanical forces. Buoyancy-driven systems are common in naturally ventilated commercial buildings because of their reliable performance in multi-story buildings. Such systems rely on atria or ventilation shafts to provide a pathway for air to rise through the building. Although numerous modeling techniques are used to simulate naturally ventilated buildings, airflow network tools (AFNs) are most commonly used for annual simulations. These AFNs, however, assume minimal momentum within each zone, which is a reasonable approximation in large atria, but is inappropriate in smaller ventilation shafts. This thesis improves AFNs by accounting for momentum effects within ventilation shafts. These improvements are validated by Computation Fluid Dynamics (CFD) models that haven been validated by small scale and full scale experiments. The full scale ...
How is ventilation , oxygen uptake abbreviated? V.O2 stands for ventilation , oxygen uptake. V.O2 is defined as ventilation , oxygen uptake rarely.
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Instalaltion of input ventilation. Professional installation of input ventilation. Input ventilation provides only supply of heated air into the room.
Boss Ventilation LLC is a family owned company in Minnesota that manufactures agricultural and commercial ventilation equipment.. Our mission is to provide ventilation products and world class service to all our customers, whether one person or a multinational.. Click to Learn More ,. ...
In this paper, analysis of the ventilation requirements of enclosed vehicular parking facilities is discussed. First, a compilation of existing U.S. and international standards and codes pertinent to the ventilation of enclosed parking facilities is presented. Then, the results of a field testing study are summarised to determine the actual ventilation rates and the
In many cases, poor ventilation is due to leaky exhaust shafts. Aeroseal has been used to solve poor ventilation issues in some of the countrys most prominent buildings.
TY - RPRT. T1 - Komponentudvikling til el-effektiv behovsstyret hybrid ventilation i boliger. T2 - Forundersøgelse. AU - Heiselberg, Per. AU - Hendriksen, Ole Juhl. AU - Antvorskov, Signe. PY - 2007. Y1 - 2007. N2 - Denne rapport udgør 1. milepæl i formidlingen af projektet Komponentudvikling til eleffektiv behovsstyret hybrid ventilation i boliger, der er finansieret af ELFOR via PSOstøtteordningen (Journal nr. 464-03, Projekt nr.336-035). Rapporten sammenfatter baggrundsundersøgelser af national og international litteratur og projektresultater samt beskriver det valgte ventilationskoncept. AB - Denne rapport udgør 1. milepæl i formidlingen af projektet Komponentudvikling til eleffektiv behovsstyret hybrid ventilation i boliger, der er finansieret af ELFOR via PSOstøtteordningen (Journal nr. 464-03, Projekt nr.336-035). Rapporten sammenfatter baggrundsundersøgelser af national og international litteratur og projektresultater samt beskriver det valgte ventilationskoncept. KW - ...
How is Fuel Building Ventilation abbreviated? FBV stands for Fuel Building Ventilation. FBV is defined as Fuel Building Ventilation somewhat frequently.
Patients with COPD have reduced exercise tolerance. Low tolerance to physical exercise in patients with COPD is multifactorial and is due to several reasons, rather important of which is reduction of lung ventilation ability. Registration of indices of ventilation during the test widens diagnostic possibilities of 6-minute walk test (6 MWT).. Materials and methods: male patients with COPD (n=34) II-IV degree of severity, average age 57,5±7,1, FEV146,8 ±14,3% predicted and male patients without COPD, average age 60,8±4,6, FEV193,3±14,4% predicted are involved in the investigation. This investigation was held on the equipment Spiropalm 6 MWT (Cosmed, Italy), which allows to measure parameters of minute ventilation (VE) in the process of standardized 6 MWT.. Results: distance, walked by patients with COPD was 362,3 ± 10,3 m and in control group 510,4 ± 15,6 (p,0,05). Indices of initial ventilation in groups werent significantly different VE 8,9±3,6 l / min in group of patients with COPD and ...
Revival from potential or apparent death. [L. resuscitatio] cardiopulmonary r. (CPR) restoration of cardiac output and pulmonary ventilation following cardiac arrest and
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All boats need ventilation, but most dont get it. Proper ventilation is important for both the maintenance of your boat and your personal comfort. Most of us
Minimum ventilation fans help create the perfect climate in minimum ventilation. If fans are too big and non-variable regulated, it results in unstable temperature
In March 2017, AIVC identified smart ventilation for buildings as a new and important topic to be addressed. Several actions were defined by AIVC Board about this topic in order to exchange and disseminate information on this topic. A working group of AIVC experts from several countries was created. One of its tasks was to agree on a definition of smart ventilation. The
Ceiling ventilation 3 Ceiling ventilation 3 - 3d model MAX | TEX 3D-Model details: Format: 3ds Max Polygons: N/A Textures: Yes Animated: No Rigged: No
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Learn more about Mixed Mode Ventilation. We have collected an overview of international studies about Mixed Mode Ventilation. Find the studies here.
Ventilation for a prestigious conservation project at Bradford-on-Avon in Wiltshire is provided by Titon HRV1 Q Plus whole-house ventilation units and...
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Browse case studies related to Culinary processing: cooking and ventilation. Commercial and domestic cooking and ventilation equipment. ...
The global ventilation fan market size was valued at USD 2.29 billion in 2018 and is projected to expand at a 7.7% CAGR over the forecast period. The growth is driven by the rising awareness regarding the benefits of ventilation in household sector
Den nye produktionsafdeling i Holbæk er opført i efteråret 2009, og vil fremover forsyne det europæiske marked med emballage til bl.a. medicinaludstyr.. I dette projekt blev der derfor stillet krav om sterile pakninger og dermed særlige krav til ventilationsentreprenørens tekniske løsninger.. DP ventilation a/s har - udover traditionel ventilation - i administrationsdelen projekteret og udført rentrumsløsninger i virksomhedens produktionsdel i form af et overtryksventileret produktionsområde, hvor luften renses i Hepa-filter.. ...
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So what happens when there is a lack of ventilation in your bathroom? Wide spread mold. This lack of ventilation causes in increase level of relative humidity. This is the...
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By Toby Graham, KPA The Occupational Health and Safety Administration (OSHA) released new COVID-19 guidance on ventilation in the workplace.
For pulmonary edema, medical treatment in addition to measures to maintain ventilation include diuretics to remove excess fluid ... Bello, Giuseppe; De Santis, Paolo; Antonelli, Massimo (September 2018). "Non-invasive ventilation in cardiogenic pulmonary ... Non-invasive ventilation is the first step for patient's who require ventilatory support. This can take the form of oxygen ... Maintaining oxygenation and ventilation in alveolar lung disease is achieved through a number of methods. The mechanism of ...
May 2010). "Meta-analysis: Noninvasive ventilation in acute cardiogenic pulmonary edema". Ann. Intern. Med. 152 (9): 590-600. ... "Effect of non-invasive positive pressure ventilation (NIPPV) on mortality in patients with acute cardiogenic pulmonary oedema: ... "Noninvasive ventilation in acute cardiogenic pulmonary edema". N. Engl. J. Med. 359 (2): 142-51. doi:10.1056/NEJMoa0707992. ... Opioids Opioids have traditionally been used in the treatment of the acute pulmonary edema that results from acute ...
Ventilation/perfusion ratio Pulmonary shunt Tulaimat, A; Patel, A; Wisniewski, M; Gueret, R (August 2016). "The validity and ... Ventilation-perfusion mismatch (parts of the lung receive oxygen but not enough blood to absorb it, e.g. pulmonary embolism) ... Mechanical ventilation is sometimes indicated immediately, or otherwise if NIV fails. Respiratory stimulants such as doxapram ... The most common causes are (in no particular order) infections, interstitial lung disease, and pulmonary oedema. Type 1 ...
... expired air ventilation and cardio-pulmonary resuscitation; diving procedures, the role of dive leader, importance of planning ... employing expired air ventilation and cardio-pulmonary resuscitation. underwater removal and replacement of scuba and ballast ...
Normal pulmonary ventilation and perfusion (V/Q) scan. The nuclear medicine V/Q scan is useful in the evaluation of pulmonary ...
Pulmonary imaging with ventilation/perfusion single photon emission tomography". European Journal of Nuclear Medicine and ... Patients with pulmonary hypertension should be administered a minimum number of particles to achieve a lung scan (i.e. 60,000 ... Kaplan WD, Come SE, Takvorian RW, Laffin SM, Gelman RS, Weiss GR, Garnick MB (November 1984). "Pulmonary uptake of technetium ... Bajc M, Neilly JB, Miniati M, Schuemichen C, Meignan M, Jonson B (August 2009). "EANM guidelines for ventilation/perfusion ...
The spirometers have been used to measure control of ventilation related to high-altitude pulmonary edema, to determine the ... Hackett PH, Roach RC, Schoene RB, Harrison GL, Mills WJ (1988). "Abnormal control of ventilation in high-altitude pulmonary ...
Investigation of pulmonary function, particularly ventilation-perfusion relationships. Measurement of inequality of ventilation ... Analysis of pulmonary gas exchange, particularly ventilation-perfusion relationships. Effects of gravity on lung mechanics. * ... Other roles include those with the NIH Cardiovascular and Pulmonary Study Section (1971-1975; chairman, 1973-1975), the ... is a noted respiratory physiologist who made major research contributions in the area of ventilation-perfusion relationships in ...
Gottlieb, G; Jackson DC (1976). "Importance of pulmonary ventilation in respiratory control in the bullfrog". Am J Physiol. 230 ... Without an operculum, other methods, such as ram ventilation, are required. Some species of sharks use this system. When they ...
Gottlieb, G; Jackson DC (1976). "Importance of pulmonary ventilation in respiratory control in the bullfrog". Am J Physiol. 230 ... pulmonary edema, pulmonary embolism, pulmonary hypertension) Infectious, environmental and other "diseases" (e.g., pneumonia, ... The ventilation of the lungs in amphibians relies on positive pressure ventilation. Muscles lower the floor of the oral cavity ... Obligate ram ventilation is also true of some pelagic bony fish species. There are a few fish that can obtain oxygen for brief ...
Pulmonary shunt Ventilation/perfusion ratio Pulmonary contusion West, John B. (2008). "Figure 5.3 Measurement of shunt flow". ... Pulmonary Physiologic Shunt (mL/min) Qt = Cardiac Output (mL/min) CCO2 = End-pulmonary-capillary Oxygen Content CaO2 = Arterial ... Similarly, the blood emerging from the pulmonary system will have oxygen flux Q t ⋅ C a O 2 {\displaystyle Q_{t}\cdot Ca_{O_{2 ... This will be made up of blood that bypassed the lungs ( Q s {\displaystyle Q_{s}} ) and that which went through the pulmonary ...
O'Connor, Patrick M.; Claessens, Leon P. A. M. (2005). "Basic avian pulmonary design and flow-through ventilation in non-avian ... Gibson, Andrea (July 13, 2005). "Study: Predatory Dinosaurs had Bird-Like Pulmonary System". Research Communications. Athens, ...
O'Connor, Patrick M.; Leon P.A.M. Claessens (2006). "Basic avian pulmonary design and flow-through ventilation in non-avian ... flow-through ventilation' system similar to that of modern birds. In such a system, the neck vertebrae and ribs are hollowed ...
It can be caused by ventilation-perfusion mismatch, intracardiac shunting, or pulmonary shunting. In some cases, the cause is ...
O'Connor, P. & Claessens, L. (July 2005). "Basic avian pulmonary design and flow-through ventilation in non-avian theropod ... A further indication for the presence of air sacs and their use in lung ventilation comes from a reconstruction of the air ... Ruben, J.A.; Jones, T.D.; Geist, N.R.; Leitch, A.; Hillenius, W.J. (1997). "Lung ventilation and gas exchange in theropod ... Ruben, J.A.; Dal Sasso, C.; Geist, N.R.; Hillenius, W. J.; Jones, T.D.; Signore, M. (January 1999). "Pulmonary function and ...
O'Connor, Patrick M.; Claessens, Leon P.A.M. (2006). "Basic avian pulmonary design and flow-through ventilation in non-avian ... These air sacs may have allowed for a basic form of avian-style 'flow-through ventilation,' where air flow through the lungs is ...
Positive pressure ventilation, meticulously adjusting the ventilator settings to avoid pulmonary barotrauma. Chest tubes as ... Pulmonary contusions are commonly associated with flail chest and that can lead to respiratory failure. This is due to the ... Aggressive pulmonary toilet A person may be intubated with a double lumen tracheal tube. In a double lumen endotracheal tube, ... Evaluation of the pulmonary status". Interact Cardiovasc Thorac Surg. 4 (6): 583-7. doi:10.1510/icvts.2005.111807. PMID ...
Currently, mechanical ventilation remains the therapeutic mainstay for pulmonary dysfunction following acute inhalation injury ... 2008) Trial of prophylactic inhaled steroids to prevent or reduce pulmonary function decline, pulmonary symptoms, and airway ... 2008) Trial of prophylactic inhaled steroids to prevent or reduce pulmonary function decline, pulmonary symptoms, and airway ... 12 h before symptoms of pulmonary edema develop. Acute lung injury (ALI), also called non-cardiogenic pulmonary edema, is ...
"The treatment of ventilatory insufficiency after pulmonary resection with tracheostomy and prolonged artificial ventilation". ... Positive pressure ventilation systems are now more common than negative pressure systems like the iron lungs. It proved to be ... of Pulmonary / Critical Care / Sleep Medicine, Univ. of Tennessee College of Medicine-Memphis, et.al., "What is the background ... Louise Reisner-Sénélar (2009). "The Danish anaesthesiologist Björn Ibsen a pioneer of long-term ventilation on the upper ...
Hopkins, SR (2006). "Exercise induced arterial hypoxemia: the role of ventilation-perfusion inequality and pulmonary diffusion ... The highest concentration of blood in the pulmonary circulation occurs in the bases of the pulmonary tree compared to the ... resulting in ventilation-perfusion mismatch. Shunting refers to blood that bypasses the pulmonary circulation, meaning that the ... If the alveolar ventilation is low, there will not be enough oxygen delivered to the alveoli for the body's use. This can cause ...
Endotracheal intubation and positive pressure ventilation may be necessary where pulmonary oedema has developed.[citation ... Patients with impaired left ventricular function may furthermore develop pulmonary edema as a result of the acute circulatory ... and this coupled with hypertension will push fluid from the intra-vascular to the interstitial compartment causing pulmonary ... disturbances Cerebral edema Convulsions Coma Bradycardia Hypotension or hypertension Tachypnoea Hypoxia Cyanosis Pulmonary ...
Tweed WA, Phua WT, Chong KY, Lim E, Lee TL (November 1991). "Large tidal volume ventilation improves pulmonary gas exchange ...
Gottlieb, G; Jackson DC (1976). "Importance of pulmonary ventilation in respiratory control in the bullfrog". Am J Physiol. 230 ... Control of ventilation. Main article: Control of ventilation. Ventilation of the lungs in mammals occurs via the respiratory ... Vascular diseases (e.g., pulmonary edema, pulmonary embolism, pulmonary hypertension). *Infectious, environmental and other " ... The ventilation of the lungs in amphibians relies on positive pressure ventilation. Muscles lower the floor of the oral cavity ...
Phillips M. Brooks, Everett O. Richey, and John E. Pickering (April 1957). Prompt Pulmonary Ventilation and Oxygen Consumption ... OF THE LESION AND COMPARISON WITH THE LESIONS OF MULTIPLE SCLEROSIS AND SCHILDER'S DISEASE Prompt Pulmonary Ventilation and ...
The use of high frequency ventilation has been reported. Mechanical ventilation can also cause pulmonary barotrauma when high ... Techniques such as pulmonary toilet (removal of secretions), fluid management, and treatment of pneumonia are employed to ... Ensuring an open airway and adequate ventilation may be difficult in people with TBI. Intubation, one method to secure the ... It is required if a tear interferes with ventilation; if mediastinitis (inflammation of the tissues in the mid-chest) occurs; ...
Whenever there is poor pulmonary ventilation, the carbon dioxide levels in the blood are expected to rise. This leads to a rise ...
Pulmonary infiltrates that resolved after giving mechanical ventilation should point to heart failure and atelectasis rather ... Marik PE (May 2011). "Pulmonary aspiration syndromes". Current Opinion in Pulmonary Medicine. 17 (3): 148-54. doi:10.1097/MCP. ... and pulmonary emboli. Unlike pneumonia, asthma and COPD typically present with wheezing, pulmonary edema presents with an ... non-invasive ventilation, or in severe cases invasive ventilation through an endotracheal tube. Regarding circulatory problems ...
"Basic avian pulmonary design and flow-through ventilation in non-avian theropod dinosaurs". Nature. 436 (7048): 253-256. ... For the structures in mammalian lungs, see pulmonary alveolus.. Air sacs are spaces within an organism where there is the ... A further indication for the presence of air sacs and their use in lung ventilation comes from a reconstruction of the air ... "Lung ventilation and gas exchange in theropod dinosaurs". Science. 278 (5341): 1267-1270. Bibcode:1997Sci...278.1267R. doi ...
... which provides for the overall exchange of gases in the body by pulmonary ventilation, external respiration and internal ...
It is also used in CT pulmonary angiography to decrease the required dose of iodinated contrast.[23] ... Ventilation/perfusion scan. *Radionuclide ventriculography. *Radionuclide angiography. *Radioisotope renography. *Sestamibi ... "Dual Energy CT Imaging for Suspected Pulmonary Embolism Using a Lower Dose of Contrast Agent". Radiology Rounds. 13 (7). ...
hypoxic pulmonary vasoconstriction. *pulmonary shunt. Interactions. *ventilation (V). *Perfusion (Q) *Ventilation/perfusion ... Examples include pulmonary function testing (e.g. nitrogen washout test, diffusion capacity testing (carbon monoxide, helium, ...
Lung ventilation is accomplished differently in each main reptile group. In squamates, the lungs are ventilated almost ... Tegu lizards are known to possess a proto-diaphragm, which separates the pulmonary cavity from the visceral cavity. While not ... North American box turtles breathe continuously during locomotion, and the ventilation cycle is not coordinated with the limb ... Landberg, Tobias; Mailhot, Jeffrey; Brainerd, Elizabeth (2003). "Lung ventilation during treadmill locomotion in a terrestrial ...
Ventilation/perfusion scan. *Radionuclide ventriculography. *Radionuclide angiography. *Radioisotope renography. *Sestamibi ... Pulmonary CT. *Head CT. *Thyroid CT. *Whole body imaging *Full-body CT scan ...
Marik, PE (May 2011). "Pulmonary aspiration syndromes". Current Opinion in Pulmonary Medicine. 17 (3): 148-54. doi:10.1097/MCP. ... Ang Non-invasive ventilation (mekanikal na bentilasyon gamit ang mask sa mukha) ay maaaring kapaki-pakinabang sa mga ipinasok ... pulmonary edema (pagkakaroon ng tubig sa baga), bronchiectasis (paglapad ng mga bronchi), kanser sa baga, at pulmonary emboli ( ... George, Ronald B. (2005). Chest medicine : essentials of pulmonary and critical care medicine (ika-5th ed. (na) edisyon). ...
CT pulmonary angiogram. *High-resolution computed tomography. *Spiral CT. *Ventilation/perfusion scan ... Maximum voluntary ventilation (MVV)[edit]. Maximum voluntary ventilation (MVV) is a measure of the maximum amount of air that ... "Chapter 14.1 Pulmonary Function Testing". ACP Medicine. Decker Intellectual Properties. Retrieved 29 April 2011.. ... Spirometry (meaning the measuring of breath) is the most common of the pulmonary function tests (PFTs). It measures lung ...
Mortality associated with severe sepsis remains high at 30-50%. When shock is present, mortality is reported to be even higher at around 50-60%. Approximately 1400 people die from sepsis each day throughout the world. In the U.S. there are approximately 750,000 new sepsis cases each year, with at least 210,000 fatalities and this is reported to be same throughout Europe. As medicine becomes more advanced, with invasive procedures and immunosuppression, the incidence of sepsis is likely to increase even more. ...
"Non-invasive ventilation during exercise training for people with chronic obstructive pulmonary disease". The Cochrane Database ... Wikimedia Commons has media related to Chronic obstructive pulmonary disease.. *Chronic obstructive pulmonary disease at Curlie ... "Chronic obstructive pulmonary disease (COPD)". WHO. Retrieved 5 June 2019. Chronic Obstructive Pulmonary Disease (COPD) is not ... pulmonary rehabilitation appears to improve the overall quality of life and the ability to exercise.[109][110] If pulmonary ...
A 1993-94 case study based on cases of pulmonary hemorrhage in infants in Cleveland, Ohio originally concluded there was causal ... A common issue with mold hazards in the household is the placement of furniture, and the lack of ventilation which this causes ... August 1998). "Acute pulmonary hemorrhage in infants associated with exposure to Stachybotrys atra and other fungi". Arch ... and environmental controls such as ventilation and suppression of dust.[53] When mold cannot be prevented, the CDC recommends ...
George Ronald B. (2005)։ Chest medicine : essentials of pulmonary and critical care medicine (5th ed.)։ Philadelphia, PA: ... Korang SK, Feinberg J, Wetterslev J, Jakobsen JC (սեպտեմբերի 30, 2016)։ «Non-invasive positive pressure ventilation for acute ... Jindal editor-in-chief SK (2011)։ Textbook of pulmonary and critical care medicine։ New Delhi: Jaypee Brothers Medical ... Beuther DA (January 2010)։ «Recent insight into obesity and asthma»։ Current Opinion in Pulmonary Medicine 16 (1): 64-70։ PMID ...
The azygos vein arches over it from behind; and the right pulmonary artery lies at first below and then in front of it. About 2 ... If a tracheal tube used for intubation is inserted too far, it will usually lodge in the right bronchus, allowing ventilation ... Eparterial refers to its position above the right pulmonary artery. The right bronchus now passes below the artery, and is ... It can have multiple variations and, although usually asymptomatic, it can be the root cause of pulmonary disease such as a ...
Pulmonary veins attach to the left atrium separately, and also the opening to the pulmonary veins are separated by a septum.[68 ... The tidal volume is seen to double resulting in a 16-fold increase in ventilation.[61] Overall, ostrich respiration can be ... There is a double circulatory plan in place possessing both a pulmonary circuit and systemic circuit.[64] ... Together, the ventrobronchi and dorsobronchi are connected by intra-pulmonary airways, the parabronchi, which form an arcade ...
CT pulmonary angiogram. *High-resolution computed tomography. *Spiral CT. *Ventilation/perfusion scan ... pulmonary artery and pulmonary vein) and therefore is considered the approach of choice for pulmonary resection (pneumonectomy ... When performed over the fifth intercostal space, it allows optimal access to the pulmonary hilum ( ...
In 2001, Eli Lilly's chairman, president and CEO, Sidney Taurel, told shareholders: "No medicine better symbolizes our mission than Xigris," calling it "one of our industry's genuine breakthroughs."[5]. Xigris was designed to fight sepsis, a condition that kills more than 200,000 Americans annually. It was the only approved drug for sepsis, and it costs $8,000 to treat a single patient. Lilly hoped it would be a blockbuster, with sales of at least a billion dollars a year. But after five years on the market, sales were only $200 million.. Eli Lilly used the Belsito & Company PR firm in a marketing campaign to promote Xigris, its drug for treatment of sepsis. A report in the New England Journal of Medicine (NEJM) accused the company of initiating false reports of a shortage of the drug to boost sales.[6] Belsito and Company spread the word that the drug was being "rationed" and physicians were being 'systematically forced' to decide who would live and who would die. As part of this effort, Lilly ...
Ventilation/perfusion scan(英语:Ventilation/perfusion scan). *Radionuclide ventriculography(英语:Radionuclide ventriculography) ... CT pulmonary angiogram(英语:CT pulmonary angiogram). *Computed tomography of the heart ...
Ventilation/perfusion scan. *Radionuclide ventriculography. *Radionuclide angiography. *Radioisotope renography. *Sestamibi ... Pulmonary CT. *Head CT. *Thyroid CT. *Whole body imaging *Full-body CT scan ...
Effect of oxygen on chronic obstructive pulmonary disease(英语:Effect of oxygen on chronic obstructive pulmonary disease) ... 通气/血流比(英语:Ventilation/perfusion ratio). *V/Q掃描(英语:ventilation/perfusion scan) ... Clark, John M; Lambertsen, Christian J. Pulmonary oxygen tolerance in man and derivation of pulmonary oxygen tolerance curves. ... 牵张感受器(英语:pulmonary stretch receptors) *赫-布反射(英语:Hering-Breuer
It is used by professional rescuers in preference to mouth-to-mouth ventilation, either directly or through an adjunct such as ... "pulmonary injuries similar to that seen in victims of chlorine gas exposure".[7] Apart from the risks of gastric inflation ... In a hospital, long-term mechanical ventilation is provided by using a more complex, automated ventilator. However a frequent ... However, when using a manual resuscitator, as with other methods of positive-pressure ventilation, the lungs are force-inflated ...
Ventilation/perfusion scan. *Radionuclide ventriculography. *Radionuclide angiography. *Radioisotope renography. *Sestamibi ... Pulmonary. *Computed tomography of the head. *Quantitative computed tomography. *Spiral computed tomography ...
機械呼吸(英语:Mechanical ventilation). *低溫治療(英语:Therapeutic hypothermia) ... 肺動脈導管(英语:Pulmonary artery catheter). *血液培養(英语:
hypoxic pulmonary vasoconstriction. *pulmonary shunt. Interactions. *ventilation (V). *Perfusion (Q) *Ventilation/perfusion ... Ventilation, or breathing, may reverse this condition by removal of carbon dioxide, thus causing a shift up in pH.[45] ... This process occurs in the pulmonary capillaries adjacent to the alveoli of the lungs. The oxygen then travels through the ... This elevation may be caused by congenital heart disease, cor pulmonale, pulmonary fibrosis, too much erythropoietin, or ...
2 partial pressure more than 60 kPa can eventually lead to permanent pulmonary fibrosis.[123] Exposure to a O. 2 partial ... Butterfield, N. J. (2009). "Oxygen, animals and oceanic ventilation: An alternative view". Geobiology. 7 (1): 1-7. doi:10.1111/ ... some disorders that cause increased pulmonary artery pressure, and any disease that impairs the body's ability to take up and ...
Miraras kareng baga ing dayang milako oxygen ibat king pusu; dadalan iti king pulmonary cavity (lukib da reng baga), at kaybat ... mechanical ventilation. *liquid breathing. Suglung a palwal[mag-edit , alilan ya ing pikuwanan]. *[http://www.leeds.ac.uk/chb/ ...
Mechanical ventilation may be required if a patient's unassisted breathing is insufficient to oxygenate the blood. ... a primary training in internal medicine sometimes pursue combined fellowship training in another subspecialty such as pulmonary ... Common equipment in an intensive care unit includes mechanical ventilation to assist breathing through an endotracheal tube or ... "The Danish anaesthesiologist Björn Ibsen a pioneer of long-term ventilation on the upper airways, Louise Reisner-Sénélar, 2009" ...
Ventilation is accomplished by buccal pumping.[66] Most amphibians, however, are able to exchange gases with the water or air ... When the ventricle starts contracting, deoxygenated blood is pumped through the pulmonary artery to the lungs. Continued ... Brainerd, E. L. (1999). "New perspectives on the evolution of lung ventilation mechanisms in vertebrates". Experimental Biology ...
敗血症常規治療包括靜脈輸液及抗生素治療,通常需要在加護病房內進行生命徵象監測。升壓劑藥物(英语:Antihypotensive_agent)使用於
2 partial pressure more than 60 kPa can eventually lead to permanent pulmonary fibrosis.[123] Exposure to a O. 2 partial ... Butterfield, N. J. (2009). "Oxygen, animals and oceanic ventilation: An alternative view". Geobiology. 7 (1): 1-7. doi:10.1111/ ... some disorders that cause increased pulmonary artery pressure, and any disease that impairs the body's ability to take up and ...
Gas imaging has opened the new field of direct imaging of pulmonary ventilation by MRI. The use of hyperpolarised 3He gas for ... Magn Reson Image Total Lung Capacity Pulmonary Ventilation Liquid Ventilation Haste Sequence These keywords were added by ... 2009) MRI of Pulmonary Ventilation. In: Kauczor HU. (eds) MRI of the Lung. Medical Radiology. Springer, Berlin, Heidelberg. * ... Gas imaging has opened the new field of direct imaging of pulmonary ventilation by MRI. The use of hyperpolarised 3He gas for ...
Might a bundled intraoperative protective ventilation strategy help reduce the risk for postoperative pulmonary complications ... of postoperative pulmonary complications), prolonged ventilation longer than 24 h, (302, 58.9% of postoperative pulmonary ... Among individual pulmonary complications (pneumonia, prolonged ventilation longer than 24 h, reintubation, and PaO2/FIO 2 less ... Intraoperative Mechanical Ventilation and Postoperative Pulmonary Complications After Cardiac Surgery. Michael R. Mathis, M.D ...
... ventilation) and circulation (perfusion) in all areas of the lungs. ... A pulmonary ventilation/perfusion scan involves two nuclear scan tests to measure breathing ( ... V/Q scan; Ventilation/perfusion scan; Lung ventilation/perfusion scan; Pulmonary embolism - V/Q scan; PE- V/Q scan; Blood clot ... A pulmonary ventilation and perfusion scan may be a lower-risk alternative to pulmonary angiography for evaluating disorders of ...
Pulmonary ventilation definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Look ... pulmonary ventilation n. The total volume of gas per minute inspired or expired. ...
Pulmonary lavage in patients treated with mechanical ventilation.. Weinstein HJ, Bone RC, Ruth WE. ... especially in patients treated with mechanical ventilation. Therefore, pulmonary lavage with 237 +/- 6 ml of physiologic saline ...
Breath sounds and distribution of pulmonary ventilation.. Leblanc P, Macklem PT, Ross WR. ...
... ventilation) and circulation (perfusion) in all areas of the lungs. ... A pulmonary ventilation/perfusion scan involves two nuclear scan tests to measure breathing ( ... V/Q scan; Ventilation/perfusion scan; Lung ventilation/perfusion scan. How the Test is Performed. A pulmonary ventilation/ ... A pulmonary ventilation and perfusion scan may be a lower-risk alternative to pulmonary angiography for evaluating disorders of ...
and the specific ventilation (s.V = 1/. ) can be determined at each individual volume element of the slice. The spatial ... A series of ventilation maps is shown in Figure 130. For each slice, the time constants have a log-normal distribution, which ... In the present work the effects of the tidal volume (VT) of inspiration on the ventilation distributions were studied in much ... This will allow the first measurement of the size of the functional unit of lung ventilation. Future studies are expected to ...
... suspension obtained from human serum albumen and labelled with 99m Technetium for use in scintigraphic imaging of pulmonary ... Ventilation scintigraphy and inhalation scintigraphy are two known scintigraphic methods for measuring regional pulmonary ... 5. In a process for scintigraphic imaging of pulmonary ventilation through inhalation of an aerosol of a carrier substance ... Process and device for aerosol generation for pulmonary ventilation scintigraphy. US 5139016 A ...
A new personal monitoring system for simultaneously measuring airborne dust concentrations and pulmonary ventilation was ... Real time pulmonary ventilation volumes were computed from average heart rates every 30 seconds using a formula that included ... Pulmonary ventilation volumes measured by the monitor were compared with those measured by an independent method. The overall ... A new personal monitoring system for simultaneously measuring airborne dust concentrations and pulmonary ventilation was ...
The Pulmonary Neuromuscular and Assisted Ventilation Program provides specialized care for patients with respiratory muscle ... Home / Medical Services / Pulmonary & Critical Care Medicine / Pulmonary Neuromuscular and Assisted Ventilation ... The Pulmonary Neuromuscular and Assisted Ventilation Program provides specialized care for patients with respiratory muscle ... Non-invasive ventilation: Also known as BiPap, nocturnal non-invasive ventilation can help support weak respiratory muscles and ...
One-lung Ventilation: Expression of Pulmonary Inflammatory Mediators. The safety and scientific validity of this study is the ... One-lung ventilation measurement in the re-ventilated lung after short-period pulmonary collapse [ Time Frame: Sep 07 ]. ... Lung: One-lung Ventilation: Expression of Pulmonary Inflammatory Mediators After Deflation and Re-expansion of the Lung During ... One-lung ventilation; organ protection; volatile anesthetics. One-lung ventilation has become a common procedure for ...
Lung Protective Ventilation in Pulmonary Thromboendarterectomy (PTE) Patients. The safety and scientific validity of this study ... Efficacy of a Low-Tidal Volume Ventilation Strategy to Prevent Reperfusion Lung Injury after Pulmonary Thromboendarterectomy. ... Chronic thromboembolic pulmonary hypertension (CTEPH) is caused by unresolved thromboemboli in the pulmonary arteries, which ... Hypertension, Pulmonary. Lung Injury. Acute Lung Injury. Respiratory Distress Syndrome, Adult. Vascular Diseases. ...
Pulmonary Perfusion and Ventilation Scan / VQ Scan appointments are guaranteed and free! ... Find best Nuclear Medicine Specialists for Pulmonary Perfusion and Ventilation Scan / VQ Scan near you & make an appointment ... Doctors for Pulmonary Perfusion and Ventilation Scan / VQ Scan Near You. who accept. enter your insurance to view in-network ...
Rescue high frequency oscillatory ventilation versus conventional ventilation for pulmonary dysfunction in preterm infants. ... Elective high frequency oscillatory ventilation versus conventional ventilation for acute pulmonary dysfunction in preterm ... Pulmonary interstitial emphysema treated by high-frequency oscillatory ventilation. Crit Care Med. 1986 Nov. 14(11):926-30. [ ... Localized persistent pulmonary interstitial emphysema in a preterm infant in the absence of mechanical ventilation. Pediatr ...
Comments on ventilation/perfusion scan in pulmonary embolism. Difficulty in the diagnosis of pulmonary embolism; Findings of a ... Value of the Ventilation/Perfusion Scan in Acute Pulmonary Embolism. // JAMA: Journal of the American Medical Association;5/23/ ... Ventilation/Perfusion Scan in Pulmonary Embolism. Bone, Roger C. // JAMA: Journal of the American Medical Association;5/23/90, ... Difficulty in diagnosing pulmonary embolism; Advantage of ventilation-perfusion lung scans; Ultrasound examinations of the legs ...
... can successfully be treated with noninvasive pressure support ventilation (NIPSV) in a clinical setting. Whether prehospital ... Prehospital noninvasive pressure support ventilation for acute cardiogenic pulmonary edema Eur J Emerg Med. 2007 Oct;14(5):276- ... Severe acute cardiogenic pulmonary edema (ACPE) can successfully be treated with noninvasive pressure support ventilation ( ... Twenty-three patients suffering from severe cardiac pulmonary edema with severe dyspnea, an oxygen saturation of less than 90% ...
... diagnosing and managing chronic obstructive pulmonary disease (COPD) in adults ... Chronic obstructive pulmonary disease Chronic obstructive pulmonary disease in adults. Quality standard [QS10]. Published date ... NICEs guideline on chronic obstructive pulmonary disease]. Non‑invasive ventilation should be given once it is recognised that ... Non‑invasive ventilation. Non‑invasive ventilation is a method of providing ventilatory support that does not require an ...
PROLONGED MECHANICAL VENTILATION OF PRETERM LAMBS LEADS TO SMOOTH MUSCLE EXTENSION AND ELASTIN ACCUMULATION ALONG PULMONARY ... Chronic lung injury from prolonged mechanical ventilation after premature birth is characterized in part by pulmonary edema and ... PROLONGED MECHANICAL VENTILATION OF PRETERM LAMBS LEADS TO SMOOTH MUSCLE EXTENSION AND ELASTIN ACCUMULATION ALONG PULMONARY ... We tested this hypothesis by determining smooth muscle extension and elastin accumulation along pulmonary arteries (PAs) and ...
Thalamonal-seduxen anesthesia with artificial pulmonary ventilation in ophthalmic surgery on children]. Download Prime PubMed ... Thalamonal-seduxen Anesthesia With Artificial Pulmonary Ventilation in Ophthalmic Surgery On Children]. Anesteziol Reanimatol. ... Thalamonal-seduxen Anesthesia With Artificial Pulmonary Ventilation in Ophthalmic Surgery On Children]." Anesteziologiia I ... Thalamonal-seduxen anesthesia with artificial pulmonary ventilation in ophthalmic surgery on children]. Anesteziol Reanimatol. ...
Aspects of Metabolism and Pulmonary Ventilation.. Ann Intern Med. 1968;68:273. doi: 10.7326/0003-4819-68-1-273_1 ... Five of the 11 reviews in this collection may hold interest for physicians concerned with pulmonary disease or metabolism. The ...
What is the role of noninvasive ventilation in cystic fibrosis? Current Opinion in Pulmonary Medicine20(6):618-622, November ... Mouthpiece ventilation has not been studied in CF patients.. Oxygen entrainment. Most commonly, O2 is entrained into the NIV ... Noninvasive ventilation in cystic fibrosis patients with acute or chronic respiratory failure. Eur Respir J 2002; 19:310-313.. ... What is the role of noninvasive ventilation in cystic fibrosis?. Bright-Thomas, Rowland J.a,b; Johnson, Susan C.a ...
Cost effectiveness of ward based non-invasive ventilation for acute exacerbations of chronic obstructive pulmonary disease: ... Cost effectiveness of ward based non-invasive ventilation for acute exacerbations of chronic obstructive pulmonary disease: ... Cost effectiveness of ward based non-invasive ventilation for acute exacerbations of chronic obstructive pulmonary disease: ... Cost effectiveness of ward based non-invasive ventilation for acute exacerbations of chronic obstructive pulmonary disease: ...
... positive pressure ventilation to treat respiratory failure resulting from exacerbations of chronic obstructive pulmonary ... Objectives: To determine the effectiveness of non-invasive positive pressure ventilation (NPPV) in the management of ... positive pressure ventilation to treat respiratory failure resulting from exacerbations of chronic obstructive pulmonary ... positive pressure ventilation to treat respiratory failure resulting from exacerbations of chronic obstructive pulmonary ...
Optimization of dual-energy xenon-computed tomography for quantitative assessment of regional pulmonary ventilation.. [Matthew ... offers visualization of the airways and quantitation of regional pulmonary ventilation using a single breath of inhaled xenon ... In this study, we sought to optimize scanning protocols for DECT xenon gas ventilation imaging of the airways and lung ... were scanned in syringes and balloon test-objects to optimize the delivered gas mixture for assessment of regional ventilation ...
A 66-year-old male with past medical history of restrictive lung disease, obstructive sleep apnea and pulmonary hypertension, ... Eventually, inhaled Nitric Oxide was initiated post operative day 3 due to increasing pulmonary arterial pressures. A bedside ... Better oxygen saturations lead to increases in blood pressure by decreasing the effects of hypoxic pulmonary vasoconstriction ... APRV gradually and temporally improved the oxygen saturation and decreased the pulmonary arterial pressures with subsequent ...
Evaluation of the Change on Pulmonary Blood Flow and Cardiac Function Induced by Capnothorax During One Lung Ventilation. The ... pulmonary blood flow = PVA(cross sectional area of LUPV) x VTI(velocity time integral) x HR , Fractional area change = [(LVAd- ... The purpose of this study is to evaluate the effects of capnothorax on the pulmonary blood flow and cardiac function during the ... The purpose of this study is to evaluate the effects of capnothorax on the pulmonary blood flow and cardiac function during the ...
Comparison of Two Oxygen Setting During Non-invasive Mechanical Ventilation of Chronic Obstructive Pulmonary Disease (OXYSET). ... Pulmonary arterial pressure [ Time Frame: 24 hours, 48 hours, 72hours ]. First 24 hours of non-invasive mechanical ventilation ... Chronic Obstructive Pulmonary Disease With Acute Exacerbation, Unspecified Device: Non-invasive mechanical ventilation - ... Comparison of Two Oxygen Setting During Non-invasive Mechanical Ventilation of Chronic Obstructive Pulmonary Disease: A ...
Registry of Stable Hypercapnic Chronic Obstructive Pulmonary Disease Treated With Non-Invasive Ventilation ... Registry of Stable Hypercapnic Chronic Obstructive Pulmonary Disease Treated With Non-Invasive Ventilation Brief description of ... There is robust scientific evidence that non-invasive ventilation (NIV) therapy is an effective option for most COPD patients ... The prevalence of chronic respiratory disease, including chronic obstructive pulmonary disease (COPD), is increasing in ...
Ventilation-perfusion scintigraphy provided useful information for diagnosing pulmonary embolism Michael K. Gould, MD, MS ... Acute pulmonary embolism: sensitivity and specificity of ventilation-perfusion scintigraphy in PIOPED II study. Radiology. 2008 ... Ventilation-perfusion scintigraphy provided useful information for diagnosing pulmonary embolism. Ann Intern Med. 2008;149:JC1- ... Wells Rule and d-Dimer Testing to Rule Out Pulmonary Embolism: A Systematic Review and Individual-Patient Data Meta-analysis ...
  • This test has largely been replaced by CT pulmonary angiography for diagnosing pulmonary embolism. (medlineplus.gov)
  • Pulmonary embolism. (medlineplus.gov)
  • Value of the Ventilation/Perfusion Scan in Acute Pulmonary Embolism. (ebscohost.com)
  • Presents a study that assessed the diagnostic usefulness of the Ventilation/Perfusion lung scans in acute pulmonary embolism. (ebscohost.com)
  • Clinical analysis of the likelihood of pulmonary embolism. (ebscohost.com)
  • Step-by-step identification of pulmonary embolism. (ebscohost.com)
  • Discusses the diagnosis of pulmonary embolism (PE). (ebscohost.com)
  • Focuses on the diagnosis of pulmonary embolism. (ebscohost.com)
  • Use of a clinical model for safe management of patients with suspected pulmonary embolism. (ebscohost.com)
  • The low specificity of ventilation-perfusion lung scanning complicates the management of patients with suspected pulmonary embolism. (ebscohost.com)
  • To determine the safety of a clinical model for patients with suspected pulmonary embolism. (ebscohost.com)
  • Controversies in Pulmonary Embolism and Deep Venous Thrombosis. (ebscohost.com)
  • Comments on the diagnosis of venous thrombolic (DVT) disease, and pulmonary embolism in particular. (ebscohost.com)
  • Radioactive isotopes of xenon are used in ventilation/perfusion lung scans to diagnose pulmonary embolism. (ebscohost.com)
  • Acute pulmonary embolism: sensitivity and specificity of ventilation-perfusion scintigraphy in PIOPED II study. (annals.org)
  • The Consult Guys - Excluding the Diagnosis of Pulmonary Embolism: Is There a Magic Ball? (annals.org)
  • Clinical conundrum: concomitant high-risk pulmonary embolism and acute ischemic stroke. (annals.org)
  • Ventilation/Perfusion SPECT for Diagnosis of Pulmonary Embolism and Other Diseases. (lu.se)
  • V/P(SPECT) has the potential to become a first hand tool for diagnosis of pulmonary embolism based on standardized technology and new holistic interpretation criteria. (lu.se)
  • articleno = {682949}, author = {Bajc, Marika and Jonson, Björn}, issn = {2090-1712}, language = {eng}, number = {Dec 19}, series = {International Journal of Molecular Imaging}, title = {Ventilation/Perfusion SPECT for Diagnosis of Pulmonary Embolism and Other Diseases. (lu.se)
  • SNMMI has released appropriate use criteria (AUC) for ventilation/perfusion (V/Q) imaging in pulmonary embolism (PE). (snmmi.org)
  • The aim was to compare ventilation/perfusion SPECT lung scintigraphy (V/Q-SPECT) and computed tomography pulmonary angiography (CTPA) in patients with suspicion of pulmonary embolism (PE). (elsevier.es)
  • Chest x-ray and CT scans are essential to exclude some differential diagnosis (aspiration pneumonitis, pulmonary embolism, cardiogenic edema) such as electrocardiogram and echocardiogram to exclude a cardiogenic etiology. (alliedacademies.org)
  • exp Tomography, Spiral Computed OR exp Tomography, X-Ray Computed OR "CT".mp) AND (exp Ventilation-Perfusion Ratio OR "VQ".mp OR "V-Q".mp OR Ventilation Perfusion.mp OR Ventilation-Perfusion.mp OR perfusion.mp) AND (exp pulmonary embolism OR pulmonary embol$.mp OR "PE".mp OR Pulmonary infarct$.mp OR exp thromboembolism$ OR thromboembolism$.mp) LIMIT to human AND English. (bmj.com)
  • Diagnosis of pulmonary embolism: ventilation perfusion scintig. (mysciencework.com)
  • Diagnosis of pulmonary embolism: ventilation perfusion scintigraphy versus helical computed tomography pulmonary angiography. (mysciencework.com)
  • The present study compared the accuracy of ventilation perfusion scintigraphy (VQS) and CT pulmonary angiography (CTPA) for the diagnosis of pulmonary embolism. (mysciencework.com)
  • This was a prospective observational study of 112 patients with suspected pulmonary embolism (PE) who could be studied with both investigations within 24 h. (mysciencework.com)
  • Diagnostic pathways in acute pulmonary embolism: recommendations of the PIOPED II investigators. (semanticscholar.org)
  • Incidence of chronic thromboembolic pulmonary hypertension after a first episode of pulmonary embolism. (semanticscholar.org)
  • Multidetector computed tomography for acute pulmonary embolism. (semanticscholar.org)
  • Ventilation-perfusion scanning and helical CT in suspected pulmonary embolism: meta-analysis of diagnostic performance. (semanticscholar.org)
  • Freeman, LM , Glaser, JE & Haramati, LB 2012, ' Planar ventilation-perfusion imaging for pulmonary embolism: The case for "outcomes" medicine ', Seminars in nuclear medicine , vol. 42, no. 1, pp. 3-10. (elsevier.com)
  • Postoperative pulmonary complications were associated with increased postoperative mortality as well as longer postoperative mechanical ventilation, ICU stay, and hospital stay ( Table 3 ). (medscape.com)
  • Pulmonary lavage in patients treated with mechanical ventilation. (nih.gov)
  • Conventional therapy is often insufficient for removal of these plugs and secretions, especially in patients treated with mechanical ventilation. (nih.gov)
  • An adequate recruitment of the different lung compartments is an important factor in anaesthesia and intensive care, where mechanical ventilation is used. (esrf.eu)
  • The landmark publication of the ARDSNET study demonstrated that a low tidal volume strategy of mechanical ventilation, decreased morbidity and mortality in patients who had acute respiratory distress syndrome (ARDS). (clinicaltrials.gov)
  • Diffuse persistent pulmonary interstitial emphysema secondary to mechanical ventilation in bronchiolitis. (medscape.com)
  • Localized persistent pulmonary interstitial emphysema in a preterm infant in the absence of mechanical ventilation. (medscape.com)
  • 7.25, have been used as a threshold for considering provision of invasive mechanical ventilation. (nice.org.uk)
  • Risk of CO2 retention during mechanical ventilation remains controversial. (clinicaltrials.gov)
  • Thus recent study suggested limited risk of CO2 retention with controlled oxygen supplementation during mechanical ventilation. (clinicaltrials.gov)
  • Breathing machines providing what is known as conventional mechanical ventilation (CMV), which is currently used to support these babies, potentially contribute to longer-term lung injury known as chronic lung disease (CLD). (cochrane.org)
  • Despite widespread improvements in care, including increased utilization of antenatal steroids, use of surfactant replacement therapy , and advances in conventional mechanical ventilation (CMV), chronic lung disease (CLD) occurs in 42% of surviving preterm infants born at less than 28 weeks gestational age (GA). High frequency ventilation (HFV) aims to optimize lung expansion while minimizing tidal volume (Vt) to decrease lung injury. (cochrane.org)
  • BACKGROUNDː: One-lung ventilation (OLV) may result in lung injury due to increased mechanical stress and tidal recruitment. (bioportfolio.com)
  • The primary hypothesis of this study is reduction in need of mechanical ventilation in the first 72 hours of life (excluding the transient tracheal intubation performed for surfactant ad. (bioportfolio.com)
  • Techniques for effecting the transition of the respiratory-failure patient from mechanical ventilation to spontaneous ventilation, while meeting the criteria that tidal volume be above a given threshold (greater than 5 ml/kg), respiratory frequency be below a given count (less than 30 breaths/min), and oxygen partial pressure be above a given threshold (PaO2 greater than 50mm Hg). (bioportfolio.com)
  • Mechanical ventilation delivered to match the patient's efforts in breathing as detected by the interactive ventilation device. (bioportfolio.com)
  • Randomized controlled trials have shown that the use of noninvasive ventilation (NIV) reduces the need for endotracheal intubation and invasive mechanical ventilation and reduces complication rates and mortality in selected groups of patients. (nih.gov)
  • Non-invasive mechanical ventilation in acute respiratory failure due to chronic obstructive pulmonary disease: correlates for success. (bmj.com)
  • BACKGROUND--Non-invasive mechanical ventilation is increasingly used in the treatment of acute respiratory failure in patients with chronic obstructive pulmonary disease (COPD). (bmj.com)
  • METHODS--Fifty nine episodes of acute respiratory failure in 47 patients with COPD treated with non-invasive mechanical ventilation were analysed, considering each one as successful (78%) or unsuccessful (22%) according to survival and to the need for endotracheal intubation. (bmj.com)
  • Success with non-invasive mechanical ventilation was associated with less severely abnormal baseline clinical and functional parameters, and with less severe levels of acidosis assessed during an initial trial of non-invasive mechanical ventilation. (bmj.com)
  • CONCLUSIONS--The severity of the episode of acute respiratory failure as assessed by clinical and functional compromise, and the level of acidosis and hypercapnia during an initial trial of non-invasive mechanical ventilation, have an influence on the likelihood for success with non-invasive mechanical ventilation and may prove to be useful in deciding whether to continue with this treatment. (bmj.com)
  • Non-invasive mechanical ventilation in acute respiratory failure. (bmj.com)
  • Intubation and mechanical ventilation are only occasionally needed. (alliedacademies.org)
  • To determine whether continuous positive airway pressure (CPAP) reduces the need for mechanical ventilation in patients with respiratory failure caused by severe cardiogenic pulmonary edema. (acpjc.org)
  • Continuous positive airway pressure with O 2 in patients with respiratory failure caused by severe cardiogenic pulmonary edema reduced the need for mechanical ventilation compared with O 2 alone. (acpjc.org)
  • Amyotrophic Lateral Sclerosis: Impact of Pulmonary Follow-Up and Mechanical Ventilation on Survival. (archbronconeumol.org)
  • Retrospective analysis of 114 consecutive patients admitted to a general hospital, evaluating demographic data, type of presentation, clinical management, treatment with mechanical ventilation and survival. (archbronconeumol.org)
  • Previous studies have examined whether the use of a ventilator at home, termed home mechanical ventilation, could help improve people's breathing and reduce the need for readmission to hospital, but these studied have not been able to demonstrate a benefit. (isrctn.com)
  • This study is a UK-wide study to investigate if home mechanical ventilation in addition to home oxygen therapy is better than home oxygen therapy on its own. (isrctn.com)
  • Participants are randomly allocated to receive home oxygen therapy with or without home mechanical ventilation. (isrctn.com)
  • They are followed up for 12 months to see if patients who received home mechanical ventilation have fewer hospital admissions. (isrctn.com)
  • Recently, much evidence suggests NIPPV in form of CPAP or BiPAP as a treatment option for Chronic Obstructive Pulmonary Disease (COPD) to improve blood gas abnormality and to reduce mortality rate, as well as to decrease the requirement of invasive mechanical ventilation and hospitalization. (eurekaselect.com)
  • It is treated through pulmonary surfactant replacement therapy and mechanical ventilator treatment until the infant's lungs are old enough to secrete enough surfactant to survive on their own. (lumenlearning.com)
  • Home Mechanical Ventilation for End-Stage Chronic Obstructive Pulmonary Disease (For All)? (georgetown.edu)
  • Purpose: The aim of this study was to assess the effect of partial liquid ventilation (PLV) and conventional mechanical ventilation (CMV) in the pattern of distribution of lung injury in a rabbit model of acute lung injury. (elsevier.com)
  • After 4 hours of mechanical ventilation, the lungs were removed and tissue injury was assessed by light microscopy using a scoring system. (elsevier.com)
  • The included studies used different interfaces for NPPV (nasal or face mask), different types of ventilation (most used pressure cycled, others used volume cycled) and different ventilators (conventional mechanical or small portable). (york.ac.uk)
  • Some studies offered conventional mechanical ventilation to all patients who failed the initial allocated treatment, while others offered this only to selected patients. (york.ac.uk)
  • Here you'll read about the different forms of mechanical ventilation, how it is different from spontaneous breathing and what modes of ventilation exist. (lecturio.com)
  • Analysis of respiratory mechanics during mechanical ventilation (MV) is able to estimate resistive, elastic and inertial components of the working pressure of the respiratory system. (biomedcentral.com)
  • Assessment of pulmonary mechanics in mechanical ventilation - Descarga este documento en PDF. (duhnnae.com)
  • 4. The system according to claim 1, wherein adjusting one or more weaning related parameters in said ventilation device includes reducing or stopping the mechanical ventilation if the IPI value is at or above a predetermined value or continuing or increasing the support of the mechanical ventilation if the IPI value is below the predetermined value. (patentsencyclopedia.com)
  • Because of the potential complications associated with mechanical ventilation, noninvasive ventilation is considered an attractive alternative in some settings. (patientcareonline.com)
  • People with an acute exacerbation of chronic obstructive pulmonary disease (COPD) and persistent acidotic hypercapnic ventilatory failure that is not improving after 1 hour of optimal medical therapy have non‑invasive ventilation. (nice.org.uk)
  • Non‑invasive ventilation is used to treat persistent hypercapnic ventilatory failure and acidosis during an exacerbation of COPD, when a person's arterial blood gases (especially the pH and carbon dioxide levels) are not responding (or worsening) despite optimal medical management. (nice.org.uk)
  • Evidence of local arrangements to ensure that people with an acute exacerbation of COPD and persistent acidotic hypercapnic ventilatory failure that is not improving after 1 hour of optimal medical treatment have non‑invasive ventilation. (nice.org.uk)
  • Proportion of people with an exacerbation of COPD and persistent acidotic hypercapnic ventilatory failure that is not improving after 1 hour of optimal medical treatment who have non‑invasive ventilation. (nice.org.uk)
  • People with COPD who have 'ventilatory failure' during a sudden flare up of their symptoms (called an acute exacerbation) are given an emergency treatment called non‑invasive ventilation if they do not improve after 1 hour of treatment with medicine and oxygen. (nice.org.uk)
  • Hypoxaemic patients with exacerbations of chronic obstructive pulmonary disease (COPD) are at some risk of carbon dioxide (CO2) retention during oxygen therapy. (clinicaltrials.gov)
  • The prevalence of chronic respiratory disease, including chronic obstructive pulmonary disease (COPD), is increasing in industrialized countries. (centerwatch.com)
  • There is robust scientific evidence that non-invasive ventilation (NIV) therapy is an effective option for most COPD patients hospitalized with acute hypercapnic respiratory failure secondary to an acute disease exacerbation. (centerwatch.com)
  • The effects of providing ventilatory assistance to patients with severe chronic obstructive pulmonary disease (COPD) during a high intensity outpatient cycle exercise programme were examined. (bmj.com)
  • Exercise limitation is a major symptom of patients with severe chronic obstructive pulmonary disease (COPD). (bmj.com)
  • Pulmonary rehabilitation programmes have been shown to improve exercise tolerance and quality of life in patients with COPD. (bmj.com)
  • 12 Proportional assist ventilation (PAV), a mode of ventilation that matches ventilator output to patient effort, 13 is more tolerable for patients with COPD 14 and is as effective at prolonging exercise as conventional IPS. (bmj.com)
  • To evaluate longitudinally the routine implementation of NIV and its effect on patients admitted to the intensive care unit (ICU) with acute exacerbation of chronic obstructive pulmonary disease (COPD) or severe cardiogenic pulmonary edema (CPE). (nih.gov)
  • Smoking-related lung diseases including chronic obstructive pulmonary disease (COPD) and lung cancer are projected to have claimed the lives of more than 30,000 Canadians in 2010. (uwo.ca)
  • Our results show that 3 He MRI measurements of ventilation have high short-term reproducibility in both healthy volunteers and subjects with COPD. (uwo.ca)
  • Introduction: Patients with severe chronic obstructive pulmonary disease (COPD) experience breathlessness leading to exercise limitation and impacting on Quality of Life (QOL). (bl.uk)
  • 2011). Therefore there was a need to investigate the feasibility of allowing patients with severe unstable COPD to exercise using Non-invasive ventilation (NIV) over time. (bl.uk)
  • Pulmonary rehabilitation programs (PRPs) could influence short-term outcomes in patients with COPD undergoing lung resection. (medworm.com)
  • A 70 year old known COPD patient presents to your emergency department with pleuritic chest pain and dyspnoea suggestive of pulmonary embolus. (bmj.com)
  • 1 published in your journal last August, analyzing the evolution of the use of non-invasive ventilation (NIV) in chronic obstructive pulmonary disease (COPD) in the region of Murcia between 1997 and 2010. (archbronconeumol.org)
  • Background: Chronic obstructive pulmonary disease (COPD) is a major cause of chronic morbidity and mortality throughout the world. (avhandlingar.se)
  • To investigate outcome according to mode of ventilation.Material and methods: Detailed data, including HRQL during recovery, from COPD patients admitted to ICUs that participated in the Swedish intensive care registry were analysed. (avhandlingar.se)
  • Chronic obstructive pulmonary disease (COPD) is the name for a collection of lung diseases usually caused by smoking. (isrctn.com)
  • The trial is designed to test the hypothesis that the use of home non-invasive ventilation (NIV) in persistently hypercapnic chronic obstructive pulmonary disease (COPD) patients following an acute hypercapnic exacerbation of COPD reduces hospital admissions and improves survival. (isrctn.com)
  • The aim of this observational study was to compare the clinical and laboratory parameters patients with chronic obstructive pulmonary disease (COPD) complicated by ARF admitted in the intensive care unit (ICU). (cureus.com)
  • Chronic obstructive pulmonary disease (COPD) is a major public health concern. (cureus.com)
  • Introduction Domiciliary non-invasive positive-pressure ventilation (NIPPV) is increasingly employed to provide respiratory support in chronic respiratory failure (CRF) due to COPD. (bmj.com)
  • Chronic obstructive pulmonary disease (COPD) is a common lung disease. (leehealth.org)
  • The benefit of non-invasive ventilation [NIV] in stable chronic obstructive pulmonary disease [COPD] remains controversial. (eurekaselect.com)
  • Kirby M, Svenningsen S, Kanhere N, Owrangi A, Wheatley A, Coxson HO, Santyr GE, Paterson NA, McCormack DG, Parraga G. Pulmonary ventilation visualized using hyperpolarized helium-3 and xenon-129 magnetic resonance imaging: differences in COPD and relationship to emphysema. (sickkids.ca)
  • To assess the effects of noninvasive positive-pressure ventilation (NPPV) in patients with acute exacerbations of chronic obstructive pulmonary disease (COPD). (york.ac.uk)
  • The aim of this study was to examine variables for early prediction of successful weaning in chronic obstructive pulmonary disease (COPD) patients during pressure support ventilation weaning. (qxmd.com)
  • Thirteen COPD patients were prospectively studied to compare the respiratory pattern (inspiratory time, expiratory time, total breath cycle duration, tidal volume, respiratory rate, minute ventilation), the respiratory drive (airway occlusion pressure at 0.1 sec, tidal volume/inspiratory time), and blood gases after 30 mins of pressure support weaning. (qxmd.com)
  • This study confirms that conventional weaning criteria are often inadequate in predicting successful weaning of COPD patients, while airway occlusion pressure at 0.1 sec during the first phase of pressure support ventilation weaning can represent a good weaning predictor. (qxmd.com)
  • Severe acute cardiogenic pulmonary edema (ACPE) can successfully be treated with noninvasive pressure support ventilation (NIPSV) in a clinical setting. (nih.gov)
  • Treatment of severe cardiogenic pulmonary edema with continuous positive airway pressure delivered by face mask. (acpjc.org)
  • Acute respiratory failure (ARF) due to cardiogenic pulmonary oedema (CPO) is typical indication for NIV. (biomedcentral.com)
  • There is no difference between NPPV and CPAP (continuous positive airway pressure), the latter being the first treatment option in acute cardiogenic pulmonary edema, but NPPV is recommended if there is any evidence of hypercapnia or if the patient remains in distress despite treatment with CPAP [ 21 ] Both NPPV and CPAP are also commonly used in exacerbations of obesity hypoventilation syndrome [ 22 ]. (biomedcentral.com)
  • How useful is it in patients with acute cardiogenic pulmonary edema? (patientcareonline.com)
  • inclusion criteria included randomized trials in which acute cardiogenic pulmonary edema was diagnosed in patients older than 18 years. (patientcareonline.com)
  • The researchers concluded that noninvasive ventilation in conjunction with standard medical therapy leads to better outcomes than does standard therapy alone in ED patients with acute cardiogenic pulmonary edema. (patientcareonline.com)
  • Conditions classified under alveolar lung disease include pulmonary edema (cardiogenic or non-cardiogenic), pneumonia (bacterial or viral), bronchoalveolar carcinoma, pulmonary hemorrhage, alveolar proteinosis and amyloidosis, and alveolar microlithiasis. (wikipedia.org)
  • Causes of acute alveolar lung disease include pulmonary edema (cardiogenic or neurogenic), pneumonia (bacterial or viral), systemic lupus erythematosus, bleeding in the lungs (e.g. (wikipedia.org)
  • A pulmonary ventilation and perfusion scan may be a lower-risk alternative to pulmonary angiography for evaluating disorders of the lung blood supply. (medlineplus.gov)
  • Effect of chronic obstructive pulmonary disease on the performance of D-dimer testing, ventilation/perfusion scintigraphy, spiral computed tomographic angiography, and conventional angiography. (bmj.com)
  • Ventilation-perfusion (V/Q) scintigraphy has a high sensitivity to detect embolic disease but its value has been challenged with the emergence of multidetector CT pulmonary angiography (CTPA). (semanticscholar.org)
  • Systemic collateral supply in patients with chronic thromboembolic and primary pulmonary hypertension: assessment with multi-detector row helical CT angiography. (semanticscholar.org)
  • Available data suggest that planar V/Q, SPECT V/Q, and computed tomographic pulmonary angiography (CTPA) have similar false-negative rates and thus have a similar impact on outcomes. (elsevier.com)
  • As part of your diagnostic strategy, you wonder if V-Q scintigraphy has better diagnostic utility than CT for pulmonary embolus. (bmj.com)
  • Ventilation-perfusion scintigraphy is more sensitive than multidetector CTPA in detecting chronic thromboembolic pulmonary disease as a treatable cause of pulmonary hypertension. (semanticscholar.org)
  • It has begun to find use in ventilation-perfusion (V/Q) scintigraphy. (elsevier.com)
  • In the present work the effects of the tidal volume (VT) of inspiration on the ventilation distributions were studied in much greater detail than in previous studies. (esrf.eu)
  • To assess the efficacy of a low tidal volume ventilation strategy in patients undergoing PTE, 134 patients will be randomized at the time of surgery to either low tidal volumes (6ml/kg of ideal body weight), or standard tidal volumes (10ml/kg of ideal body weight). (clinicaltrials.gov)
  • Variable ventilation can stabilize lung mechanics by avoiding the monotonic tidal volume and protect lung parenchyma as tidal recruitment is encompassed within the tidal volume variability. (bioportfolio.com)
  • Low tidal volume (= tidal volume ≤ 6 mL/kg, predicted body weight) ventilation using volume control benefits patients with acute respiratory distress syndrome. (bioportfolio.com)
  • This improves lung filling and directly increases minute ventilation by increasing functional residual capacity and tidal volume. (ebmedicine.net)
  • the rate of pulmonary ventilation is defined as the tidal volume multiplied by the number of breaths taken per minute. (writework.com)
  • After 30 mins of pressure support ventilation weaning (pressure support level 20 cm H2O), we measured respiratory pattern (airway pressure and airflow tracing), airway occlusion pressure at 0.1 sec (occluding the inspiratory line during expiration with a rubber balloon), tidal volume/inspiratory time, maximal inspiratory pressure, and blood gases. (qxmd.com)
  • Problems in using only ventilation/perfusion scans for definitive diagnosis of pulmonary embolic. (ebscohost.com)
  • Interpretation should also take into account all ventilation and perfusion patterns allowing diagnosis of other cardiopulmonary diseases than PE. (lu.se)
  • We use pulmonary interventional procedures for the diagnosis of pulmonary diseases either for benign or malignant lesions. (jcancer.org)
  • Pulmonary medicine - What is the diagnosis? (mixtmedia.nl)
  • A pulmonary ventilation/perfusion scan involves two nuclear scan tests to measure breathing (ventilation) and circulation (perfusion) in all areas of the lungs. (medlineplus.gov)
  • The ventilation scan is used to see how well air moves and blood flows through the lungs. (medlineplus.gov)
  • A ventilation and perfusion scan is most often done to detect a pulmonary embolus (blood clot in the lungs). (medlineplus.gov)
  • Non‑invasive ventilation involves wearing a mask connected to a machine that pumps oxygen into the lungs. (nice.org.uk)
  • Ventilation" refers to the volume of air that the lungs exchange each minute and defines an important variable of an individual's pulmonary physiology. (pathwaymedicine.org)
  • A pulmonary embolus is a blockage of an artery in the lungs. (leehealth.org)
  • Pulmonary ventilation/perfusion scans are the most commonly used nuclear scanning tests when measuring breathing and circulation in the lungs. (northshore.org)
  • air moves into lungs when pressure inside lungs is less than atmospheric pressure, air moves out of lungs when pressure inside lungs is greater than atmospheric pressure Pulmonary ventilation, commonly known as 'breathing' is the process of moving air into and out of the lungs. (mixtmedia.nl)
  • Pulmonary ventilation is the act of breathing, which can be described as the movement of air into and out of the lungs. (mixtmedia.nl)
  • In these lessons, we explore topics such as how we get air into our lungs, the role of airway resistance in ventilation, the transport of oxygen and carbon dioxide between the lungs and tissues, and the regulation of breathing. (coursera.org)
  • Depending on the type of alveolar lung disease, the listener may hear "crackles" that indicate an excess of fluid in the lungs or an absence of lung sounds in certain regions which may indicate poor ventilation due to consolidation of pus or fibrosis. (wikipedia.org)
  • For pulmonary edema, medical treatment in addition to measures to maintain ventilation include diuretics to remove excess fluid from the lungs. (wikipedia.org)
  • This review assessed noninvasive positive-pressure ventilation (NPPV) for acute exacerbations of chronic obstructive pulmonary disease. (york.ac.uk)
  • Individual nonmutually exclusive components of postoperative pulmonary complications included pneumonia (121 cases, 23.6% of postoperative pulmonary complications), prolonged ventilation longer than 24 h, (302, 58.9% of postoperative pulmonary complications), reintubation (115, 22.4% of postoperative pulmonary complications), and PaO 2 /F IO 2 below 100 mmHg (164, 32.0% of postoperative pulmonary complications). (medscape.com)
  • Adherence to varying thresholds and independent associations with postoperative pulmonary complications are provided in Supplemental Digital Content 1A through 1C ( http://links.lww.com/ALN/C26 ). (medscape.com)
  • Crude incidence of postoperative pulmonary complications among cases using an overall lung-protective ventilation strategy was 6.6%, compared with 13.9% among cases without an overall lung-protective ventilation strategy ( Table 2 ). (medscape.com)
  • Assisted ventilation and its complications. (medscape.com)
  • Alveolar recruitment maneuver had been reported of improving arterial oxygenation and pulmonary mechanics and reduce the pulmonary complications. (bioportfolio.com)
  • The ventilation of the patient under general anesthesia is an old problem and extensively studied, especially in visceral surgery, higher risk of postoperative complications. (bioportfolio.com)
  • The minute ventilation/carbon dioxide output (VE/VCO2) slope has proven to be a predictor of surgical complications and mortality. (medworm.com)
  • The method of sedation and ventilation is very important in order to avoid or handle with success complications. (jcancer.org)
  • Postoperative pulmonary complications (PPCs) are the most common perioperative complications following surgical site infection (SSI). (biomedcentral.com)
  • Despite the positive outcomes of the use of noninvasive positive pressure ventilation (NPPV) in patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD), NPPV fails in approximately 15% of patients with AECOPD, possibly because the inspiratory pressure delivered by conventional low-intensity NPPV is insufficient to improve ventilatory status for these patients. (biomedcentral.com)
  • CPAP and BiPAP are the most common forms of noninvasive positive pressure ventilation (NIPPV). (eurekaselect.com)
  • Patients with Acute Hypercapnic Respiratory Failure (AHRF) who are unresponsive to appropriate medical treatment, are often treated with Noninvasive Positive Pressure Ventilation (NPPV). (biomedcentral.com)
  • Their meta-analysis included a comparison of continuous positive airway pressure, noninvasive positive pressure ventilation, and standard medical therapy. (patientcareonline.com)
  • Similarly, carbon dioxide is delivered to the alveolus in the mixed venous blood and diffuses into the alveolus in the pulmonary capillary. (mhmedical.com)
  • The carbon dioxide is removed from the alveolus by alveolar ventilation. (mhmedical.com)
  • As will be discussed in Chapter 6 , at resting cardiac outputs the diffusion of both oxygen and carbon dioxide is normally limited by pulmonary perfusion. (mhmedical.com)
  • To compare the benefits and side effects of HFJV versus HFOV for mortality and morbidity in preterm infants born at less than 37 weeks GA with pulmonary dysfunction in both elective and rescue modes. (cochrane.org)
  • Perhaps immunocompromised patients, who represent a growing segment of ICU admissions, could then avoid the excess morbidity and mortality (largely from nosocomial infections) associated with intubation and ventilation. (acpjc.org)
  • The authors conclude that the introduction of this treatment has led to more patients receiving assisted ventilation, but that no improvement has been seen in terms of overall mortality or mean hospital stay. (archbronconeumol.org)
  • NIV has short- and long-term benefits compared to invasive ventilation, without increasing mortality risk in case of failure. (avhandlingar.se)
  • The outcome was assessed in terms of duration of ventilation, hospital and ICU stay and overall mortality. (cureus.com)
  • stated in a review article, that in patients with acute heart failure treated with nonvasive ventilation, many studies show some degree of benefit in regards to relief of respiratory distress, lower intubation rates or decreased mortality. (biomedcentral.com)
  • Acute acidotic hypercapnic respiratory failure results from an inability of the respiratory system to provide sufficient alveolar ventilation to maintain a normal arterial PCO2 and blood pH level. (nice.org.uk)
  • The purpose of the study was to determine whether ventilation technique and bronchial diameter have an effect on broncho-arterial ratios. (uzh.ch)
  • For each ventilation technique, broncho-arterial ratios were grouped into those obtained from small or large bronchi using the median diameter of the bronchi as the cutoff value. (uzh.ch)
  • Body position directly affects ventilation and perfusion matching and arterial oxygen levels. (mixtmedia.nl)
  • Ten patients were randomised to exercise with ventilatory assistance using proportional assist ventilation (PAV) and nine (two women) to exercise unaided. (bmj.com)
  • Independent pulmonary ventilation was introduced in the 1930s and allows the utilization of different ventilatory strategies for each lung to improve gas exchange, respiratory mechanics or both in patients with heterogeneous lung diseases. (biomedcentral.com)
  • High-intensity NPPV, a novel form that delivers high inspiratory pressure, is believed to more efficiently augment alveolar ventilation than low-intensity NPPV, and it has been shown to improve ventilatory status more than low-intensity NPPV in stable AECOPD patients. (biomedcentral.com)
  • Numerous previous studies [ 13 - 19 ] have indicated that NPPV corrects ventilatory status, reduces the need for invasive ventilation, and improves prognosis more than conventional oxygen therapy. (biomedcentral.com)
  • In contrast, the ventilatory volume that renews the gas exchange areas contributes to the so called Alveolar Ventilation rate and displays some regional variation within the upright lung as described in Pulmonary Ventilation Distribution . (pathwaymedicine.org)
  • Ventilatory support is recognized as an essential component to treat pulmonary edema and acute respiratory distress syndrome. (wikipedia.org)
  • Non-invasive ventilation is the first step for patient's who require ventilatory support. (wikipedia.org)
  • Presented here is a case of agenesis of the left pulmonary artery which presented following a subendocardial infarction which raised the suspicion for pulmonary embolus. (ebscohost.com)
  • A short cut review was carried out to establish whether VQ scanning has better utility than CT in investigating possible pulmonary embolus in patients with chronic respiratory disease. (bmj.com)
  • Initial investigations do not exclude pulmonary embolus. (bmj.com)
  • In 2013 to 2014, over 400 publications on noninvasive ventilation demonstrate its increasing clinical application, however only seven reference CF. Recent technological advances and potential benefits to CF patients are considered. (lww.com)
  • Clinical trials of either pulmonary perfusion or ventilation during cardiopulmonary bypass (CBP) are equivocal. (frontiersin.org)
  • Simultaneous pulmonary perfusion and ventilation during CBP were not associated with improved clinical outcomes. (frontiersin.org)
  • Superimposed high-frequency jet ventilation (SHFJV) is supposed to be safe and effective in clinical practice. (jcancer.org)
  • Clinical and laboratory parameters were evaluated at baseline and at 24 hours of ventilation. (cureus.com)
  • Identifying chronic thromboembolic pulmonary disease as a cause of PH has major clinical implications as these patients could be potentially offered a surgical cure. (semanticscholar.org)
  • Pulmonary endarterectomy: part I. Pathophysiology, clinical manifestations, and diagnostic evaluation of chronic thromboembolic pulmonary hypertension. (semanticscholar.org)
  • We detail outcomes of clinical examination, pulmonary function testing, quality of life assessment and radiographic appearance on CT Thorax at follow-up at 6 months. (lenus.ie)
  • Further clinical assessment and pulmonary function testing were performed at median 19months (range 18-21 months) post-discharge. (lenus.ie)
  • In this article, we shall look at the physiology of ventilation - the process of inspiration and expiration and rest, during forced breathing and their clinical correlations. (teachmephysiology.com)
  • 2. This review provides an overview of the relationship between ventilation/perfusion ratios and gas exchange in the lung, emphasising basic concepts and relating them to clinical scenarios. (mixtmedia.nl)
  • Pulmonary function testing (PFT) is a complete evaluation of the respiratory system including patient history, physical examinations, and tests of pulmonary function. (mixtmedia.nl)
  • Twenty-three patients suffering from severe cardiac pulmonary edema with severe dyspnea, an oxygen saturation of less than 90% and basal rales were included in this controlled prospective randomized trial. (nih.gov)
  • Muscularization of PAs and elastin accumulation in PAs and PVs may contribute to the histologic and extravascular lung water content evidence of pulmonary edema, and the sustained PVR by increasing the filtration pressure and resistance along the pulmonary microcirculation. (nature.com)
  • Negative-pressure pulmonary edema treated with nasal high flow ventilation. (alliedacademies.org)
  • Gutierrez B, Nallatamby A, Pichon N. Negative-pressure pulmonary edema treated with nasal high flow ventilation. (alliedacademies.org)
  • The authors describe an unusual treatment with nasal high flow ventilation for a negativepressure pulmonary edema occurred during intense inspiratory effort with upper airway obstruction after shrouding. (alliedacademies.org)
  • High-flow nasal cannula oxygen therapy, Negative-pressure pulmonary edema, Acute respiratory failure. (alliedacademies.org)
  • Negative-pressure pulmonary edema (NPPE) is a rare lifethreatening form of sudden onset, noncardiogenic pulmonary edema that can occur after the relief of an upper airway obstruction and in otherwise healthy young persons who are capable of producing large markedly negative intrathoracic pressure. (alliedacademies.org)
  • Chest radiograph revealed bilateral alveolar infiltrate consistent with pulmonary edema ( Figure 1 ). (alliedacademies.org)
  • Negative-pressure pulmonary edema (NPPE) is a welldescribed cause of acute respiratory failure and a form of sudden onset noncardiogenic pulmonary edema [ 1 , 2 ]. (alliedacademies.org)
  • Resolution of the pulmonary edema is usually rapid, in part because alveolar fluid clearance mechanisms are intact [ 1 ]. (alliedacademies.org)
  • The addition of positive end-expiratory pressure (PEEP) or continuous positive airway pressure improve pulmonary edema resolution [ 6 , 8 ]. (alliedacademies.org)
  • With this study, Bersten and colleagues add evidence for the emerging role of CPAP in the treatment of acute pulmonary edema. (acpjc.org)
  • This study shows that early implementation of CPAP can decrease both the need for intubation as well as length of stay in the intensive care unit (ICU) for a patient who develops acute pulmonary edema. (acpjc.org)
  • Future studies should examine whether nasal CPAP affords the same benefit as mask CPAP in the treatment of acute pulmonary edema. (acpjc.org)
  • Pulmonary edema and pulmonary fibrosis cause hypoxemia by which mechanism. (mixtmedia.nl)
  • Some more commonly seen instances of alveolar lung disease include pulmonary edema and pneumonia. (wikipedia.org)
  • Difficulty breathing, a cardinal symptom of left ventricular failure, may manifest with progressively increasing severity as the following: Difficulty breathing with physical activity (exertional dyspnea) Difficulty breathing while lying flat (orthopnea) Episodes of waking up from sleep gasping for air (paroxysmal nocturnal dyspnea) Acute pulmonary edema Other cardiac symptoms of heart failure include chest pain/pressure and palpitations. (wikipedia.org)
  • A pulmonary ventilation/perfusion scan is actually 2 tests. (medlineplus.gov)
  • During the ventilation scan, you breathe in radioactive gas through a mask while you are sitting or lying on a table under the scanner arm. (medlineplus.gov)
  • A chest x-ray is usually done before or after a ventilation and perfusion scan. (medlineplus.gov)
  • The mask used during the ventilation scan may make you feel nervous about being in a small space (claustrophobia). (medlineplus.gov)
  • The provider should take a ventilation and perfusion scan and then evaluate it with a chest x-ray. (medlineplus.gov)
  • Other tests may be needed to confirm or rule out the findings of a pulmonary ventilation and perfusion scan. (medlineplus.gov)
  • Lung scan, perfusion and ventilation (V/Q scan) - diagnostic. (medlineplus.gov)
  • A pulmonary ventilation/perfusion scan is actually two tests. (sutterhealth.org)
  • Despite a ventilation perfusion long scan which showed. (ebscohost.com)
  • N-terminal natriuretic peptide and ventilation-perfusion lung scan in sickle cell disease and thalassemia patients with pulmonary hypertension. (semanticscholar.org)
  • There are two parts to a VQ scan: ventilation and perfusion. (northshore.org)
  • For the pulmonary ventilation portion of the scan, the patient will breathe through a mask for approximately five minutes. (northshore.org)
  • Potential limitations of oxygen-enhanced lung MRI are the relatively low signal enhancement corresponding to a T 1 reduction of about 10 %, and the complex contrast mechanism with contributions due to ventilation, perfusion, and oxygen-diffusion properties of the lung. (springer.com)
  • Nunez-Ramiro A, Aguar M, Cernada M, Parra-Llorca A, Vento M. Oxygen needs during resuscitation and surfactant to achieve stabilisation were independent risks factors for pulmonary interstitial emphysema in preterm infants. (medscape.com)
  • balance oxygen) were scanned in syringes and balloon test-objects to optimize the delivered gas mixture for assessment of regional ventilation while allowing for the development of improved 3-material decomposition calibration parameters. (sigmaaldrich.com)
  • HFNC, with low PEEP maintained by high-flow oxygen is an alternative to standard oxygen or noninvasive ventilation usually used to treat NPPE. (alliedacademies.org)
  • Glucose is obtained by digestion of food and oxygen is taken from the air during a process called breathing or ventilation. (writework.com)
  • Oxygen is delivered to the alveolus by alveolar ventilation, is removed from the alveolus as it diffuses into the pulmonary capillary blood, and is carried away by blood flow. (mhmedical.com)
  • PROtective Ventilation with a low versus high Inspiratory Oxygen fraction trial (PROVIO) is a single-center, prospective, randomized controlled trial planning to recruit 252 patients undergoing abdominal surgery lasting for at least 2 h. (biomedcentral.com)
  • The PROVIO trial assesses the effect of low versus high FiO 2 added to a lung-protective ventilation strategy on PPCs for abdominal surgery patients and the results should provide practical approaches to intraoperative oxygen management. (biomedcentral.com)
  • deliver gases to/from cells, Mitochondria need the oxygen to metabolize fuels, - Ventilation. (mixtmedia.nl)
  • 3. The system according to claim 1, wherein the one or more weaning related parameters comprise: ventilation volume, ventilation pressure, supplemental oxygen, positive end expiratory pressure (PEEP) or any combination thereof. (patentsencyclopedia.com)
  • The two focuses of management for alveolar disease is supportive care to maintain oxygenation and ventilation to ensure that adequate oxygen is being delivered to blood, and to treat the underlying insult to the alveoli. (wikipedia.org)
  • Proper respiration during pulmonary (or other interventional) procedures is a key factor. (jcancer.org)
  • The surface tension of alveolar fluid is regulated by pulmonary surfactant, allowing efficient respiration. (lumenlearning.com)
  • The primary endpoint is NPPV failure rate, defined as the need for endotracheal intubation and invasive ventilation. (biomedcentral.com)
  • Infants younger than 1 year old with acute respiratory failure caused by severe bronchiolitis underwent neuromuscular blockade, tracheal intubation and volume controlled MV. Shortly after intubation studies of pulmonary mechanics were performed using inspiratory and expiratory breath hold. (biomedcentral.com)
  • Finally, intubation with ventilator support can be used with positive pressure to improve ventilation and oxygenation. (wikipedia.org)
  • Noninvasive ventilation (NIV) relies on the creation of consistent positive airway pressure that results in increased laminar flow, stenting open airways and eliminating dead space. (ebmedicine.net)
  • Type II avleolar epithelial cells secrete pulmonary surfactant to lower the surface tension of water, which helps prevent airway collapse. (lumenlearning.com)
  • To evaluate the utilization of independent pulmonary ventilation with protective lung strategies and recruitment maneuvers in patients with acute unilateral lung diseases caused by pneumonia and chest trauma. (biomedcentral.com)
  • Optimization of dual-energy xenon-computed tomography for quantitative assessment of regional pulmonary ventilation. (sigmaaldrich.com)
  • Dual-energy x-ray computed tomography (DECT) offers visualization of the airways and quantitation of regional pulmonary ventilation using a single breath of inhaled xenon gas. (sigmaaldrich.com)
  • To determine the effectiveness of non-invasive positive pressure ventilation (NPPV) in the management of respiratory failure secondary to acute exacerbation of chronic obstructive pulmonary disease. (bmj.com)
  • NPPV should be the first line intervention in addition to usual medical care to manage respiratory failure secondary to an acute exacerbation of chronic obstructive pulmonary disease in all suitable patients. (bmj.com)
  • Acute exacerbation of chronic obstructive pulmonary disease (AECOPD) is frequently encountered as a medical emergency. (cureus.com)
  • Chronic thromboembolic pulmonary hypertension (CTEPH) is caused by unresolved thromboemboli in the pulmonary arteries, which lead to pulmonary hypertension and, left untreated, right heart failure. (clinicaltrials.gov)
  • Chronic Thromboembolic Pulmonary Hypertension. (semanticscholar.org)
  • Assessment of operability in chronic thromboembolic pulmonary hypertension. (semanticscholar.org)
  • Chronic thromboembolic pulmonary hypertension--not so rare after all. (semanticscholar.org)
  • The direct visual assessment of the lung parenchyma and imaging of lung ventilation using proton MRI is considerably more difficult than MRI of most other organs due to the very low signal intensity of the lung parenchyma. (springer.com)
  • This will allow the first measurement of the size of the functional unit of lung ventilation. (esrf.eu)
  • One-lung ventilation has become a common procedure for thoracoscopic surgery. (clinicaltrials.gov)
  • The iatrogenic capnothorax with one-lung ventilation during VATET may cause hemodynamic instability due to the compression of intrathoracic structures. (clinicaltrials.gov)
  • During One-lung ventilation, the use of lower tidal volumes (VT) is helpful to avoid over-distension, provide sufficient oxygenation, but can result in increased atelectasis. (bioportfolio.com)
  • Five of the 11 reviews in this collection may hold interest for physicians concerned with pulmonary disease or metabolism. (annals.org)
  • We conclude that the effects on respiratory function and pulmonary radiological appearance are similar to those observed following conventional treatment of Acute Respiratory Distress Syndrome [ARDS]. (lenus.ie)
  • [ 57 ] However, McCallion et al found no significant difference in the rate of PIE either in a pooled analysis within subgroups or the overall pooled analysis of trials comparing volume-targeted versus pressure-limited ventilation in the neonate. (medscape.com)
  • So, pulmonary function tests, these are again going to be used in helping diagnose patient with obstructive versus restrictive lung disease and also to monitor their disease progression. (coursera.org)
  • Reinflation of the alveoli following exhalation is made easier by pulmonary surfactant. (lumenlearning.com)
  • Gas exchange between the alveoli and the pulmonary capillary blood occurs by diffusion, as will be discussed in the next chapter. (mhmedical.com)
  • These concentration differences must be maintained by ventilation of the alveoli and perfusion of the pulmonary capillaries. (mhmedical.com)
  • would be 1.0, but there would be no gas exchange because there could be no gas diffusion between the ventilated alveoli and the perfused pulmonary capillaries. (mhmedical.com)
  • 15. Edited by J.M.B. Alveolar ventilation refers to the amount of gas that reaches the alveoli during a breath. (mixtmedia.nl)
  • These days, most patients can be supported with non-invasive ventilation. (ucsd.edu)
  • Developments in both ventilator and interface design may enhance the efficacy of ventilation in CF patients but require careful individualized assessment and regular review. (lww.com)
  • Imaging Assessment of Partial Liquid Ventilation in Bronchopulmonary Dysplasia. (bioportfolio.com)
  • Department of Pulmonary Rehabilitation, Centro Medico di Montescano, Italy. (bmj.com)
  • Pulmonary rehabilitation (PR) may improve QOL, but those with the severest disease are frequently hospitalised and cannot readily access PR. (bl.uk)
  • Our primary objective was to evaluate the impact of non-invasive, external, thoraco-abdominal ventilation on pulmonary blood flow (PBF) and cardiac output (CO) as measured by cardiovascular magnetic resonance (CMR) imaging in adult Fontan subjects. (bmj.com)
  • For instance, suppose that all 5 L/min of the cardiac output went to the left lung and all 5 L/min of alveolar ventilation went to the right lung. (mhmedical.com)
  • There has been a major inclination towards utilization of non-invasive positive pressure ventilation (NIPPV) and sparing invasive positive pressure ventilation (IPPV) for life-threatening respiratory distress and/or in patients where NIPPV failure is observed. (cureus.com)
  • NIPPV patients had a significantly shorter duration of ventilation, ICU stay, and hospital stay. (cureus.com)
  • Initial therapy of acute decompensated heart failure usually includes some combination of a vasodilator such as nitroglycerin, a loop diuretic such as furosemide, and non-invasive positive pressure ventilation (NIPPV). (wikipedia.org)
  • Agenesis of the Left Pulmonary Artery As A Cause of Hemoptysis. (ebscohost.com)
  • Agenesis of a pulmonary artery is an unusual cause of hemoptysis. (ebscohost.com)
  • UNLABELLED Pulmonary hypertension (PH) is a progressive disease with a poor prognosis. (semanticscholar.org)
  • ACR Appropriateness Criteria® Suspected Pulmonary Hypertension. (semanticscholar.org)
  • Pulmonary Physiology, 8e Levitzky MG. Levitzky M.G. Ed. Michael G. Levitzky. (mhmedical.com)
  • Our next article considers the physiology of ventilation. (teachmephysiology.com)
  • Gray's synthesis of the seemingly divergent facts regarding the physiology of pulmonary ventilation is a strong case for the essentially cooperative nature of "independent" physiological regulatory systems. (jamanetwork.com)
  • Maintained inspiratory activity during proportional assist ventilation in surfactant-depleted cats early after surfactant instillation : phrenic nerve and pulmonary stretch receptor activity. (diva-portal.org)
  • BACKGROUND: Inspiratory activity is a prerequisite for successful application of patient triggered ventilation such as proportional assist ventilation (PAV). (diva-portal.org)
  • Flexible bronchoscopy with or without radial endobronchial ultrasound, convex-probe endobronchial ultrasound and electromagnetic navigation are procedures performed in centers with experience in diagnostic pulmonary medicine. (jcancer.org)
  • The purpose of this study is to evaluate the effects of capnothorax on the pulmonary blood flow and cardiac function during the VATET by using the transesophageal echocardiography. (clinicaltrials.gov)