Ventilation. Medical search

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)

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 total volume of gas inspired or expired per unit of time, usually measured in liters 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.

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.

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.

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 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.

Mechanical devices used to produce or assist pulmonary ventilation.

The exchange of OXYGEN and CARBON DIOXIDE between alveolar air and pulmonary capillary blood that occurs across the BLOOD-AIR BARRIER.

A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.

The ratio of alveolar ventilation to simultaneous alveolar capillary blood flow in any part of the lung. (Stedman, 25th ed)

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 clinical manifestation of abnormal increase in the amount of carbon dioxide in arterial blood.

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.

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.

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)

Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.

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 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 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.

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.

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)

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)

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 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.

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.

The number of times the HEART VENTRICLES contract per unit of time, usually per minute.

The artificial substitution of heart and lung action as indicated for HEART ARREST resulting from electric shock, DROWNING, respiratory arrest, or other causes. The two major components of cardiopulmonary resuscitation are artificial ventilation (RESPIRATION, ARTIFICIAL) and closed-chest CARDIAC MASSAGE.

Respiratory retention of carbon dioxide. It may be chronic or acute.

Drugs used to induce drowsiness or sleep or to reduce psychological excitement or anxiety.

Evaluation, planning, and use of a range of procedures and airway devices for the maintenance or restoration of a patient's ventilation.

The hospital unit in which patients with respiratory conditions requiring special attention receive intensive medical care and surveillance.

The contamination of indoor air.

Elements that constitute group 18 (formerly the zero group) of the periodic table. They are gases that generally do not react chemically.

Measurement of volume of air inhaled or exhaled by the lung.

An abnormal increase in the amount of oxygen in the tissues and organs.

Difficult or labored breathing.

Examination, therapy or surgery of the interior of the larynx performed with a specially designed endoscope.

Measurement of the volume of gas in the lungs, including that which is trapped in poorly communicating air spaces. It is of particular use in chronic obstructive pulmonary disease and emphysema. (Segen, Dictionary of Modern Medicine, 1992)

The posture of an individual lying face up.

Clinical manifestation consisting of a deficiency of carbon dioxide in arterial blood.

Rhythmic compression of the heart by pressure applied manually over the sternum (closed heart massage) or directly to the heart through an opening in the chest wall (open heart massage). It is done to reinstate and maintain circulation. (Dorland, 28th ed)

A vital statistic measuring or recording the rate of death from any cause in hospitalized populations.

An accumulation of air or gas in the PLEURAL CAVITY, which may occur spontaneously or as a result of trauma or a pathological process. The gas may also be introduced deliberately during PNEUMOTHORAX, ARTIFICIAL.

Infection of the lung often accompanied by inflammation.

Disorders affecting the organs of the thorax.

The removal of secretions, gas or fluid from hollow or tubular organs or cavities by means of a tube and a device that acts on negative pressure.

The architecture, functional design, and construction of hospitals.

Measure of the maximum amount of air that can be expelled in a given number of seconds during a FORCED VITAL CAPACITY determination . It is usually given as FEV followed by a subscript indicating the number of seconds over which the measurement is made, although it is sometimes given as a percentage of forced vital capacity.

A drug-induced depression of consciousness during which patients respond purposefully to verbal commands, either alone or accompanied by light tactile stimulation. No interventions are required to maintain a patent airway. (From: American Society of Anesthesiologists Practice Guidelines)

A condition caused by inhalation of MECONIUM into the LUNG of FETUS or NEWBORN, usually due to vigorous respiratory movements during difficult PARTURITION or respiratory system abnormalities. Meconium aspirate may block small airways leading to difficulties in PULMONARY GAS EXCHANGE and ASPIRATION PNEUMONIA.

A tubular organ of VOICE production. It is located in the anterior neck, superior to the TRACHEA and inferior to the tongue and HYOID BONE.

Surgery performed on the thoracic organs, most commonly the lungs and the heart.

Anesthesia caused by the breathing of anesthetic gases or vapors or by insufflating anesthetic gases or vapors into the respiratory tract.

Introduction of a tube into a hollow organ to restore or maintain patency if obstructed. It is differentiated from CATHETERIZATION in that the insertion of a catheter is usually performed for the introducing or withdrawing of fluids from the body.

Blocking of the PULMONARY ARTERY or one of its branches by an EMBOLUS.

The small thick cartilage that forms the lower and posterior parts of the laryngeal wall.

Continuous care and monitoring of newborn infants with life-threatening conditions, in any setting.

The maximum volume of air that can be inspired after reaching the end of a normal, quiet expiration. It is the sum of the TIDAL VOLUME and the INSPIRATORY RESERVE VOLUME. Common abbreviation is IC.

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.

The presence of bacteria, viruses, and fungi in the air. This term is not restricted to pathogenic organisms.

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.

Washing out of the lungs with saline or mucolytic agents for diagnostic or therapeutic purposes. It is very useful in the diagnosis of diffuse pulmonary infiltrates in immunosuppressed patients.

Application of a life support system that circulates the blood through an oxygenating system, which may consist of a pump, a membrane oxygenator, and a heat exchanger. Examples of its use are to assist victims of smoke inhalation injury, respiratory failure, and cardiac failure.

Recording of change in the size of a part as modified by the circulation in it.

A small cluster of chemoreceptive and supporting cells located near the bifurcation of the internal carotid artery. The carotid body, which is richly supplied with fenestrated capillaries, senses the pH, carbon dioxide, and oxygen concentrations in the blood and plays a crucial role in their homeostatic control.

The restoration to life or consciousness of one apparently dead. (Dorland, 27th ed)

PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.

Endoscopic examination, therapy or surgery of the bronchi.

A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.

Washing liquid obtained from irrigation of the lung, including the BRONCHI and the PULMONARY ALVEOLI. It is generally used to assess biochemical, inflammatory, or infection status of the lung.

Non-therapeutic positive end-expiratory pressure occurring frequently in patients with severe airway obstruction. It can appear with or without the administration of external positive end-expiratory pressure (POSITIVE-PRESSURE RESPIRATION). It presents an important load on the inspiratory muscles which are operating at a mechanical disadvantage due to hyperinflation. Auto-PEEP may cause profound hypotension that should be treated by intravascular volume expansion, increasing the time for expiration, and/or changing from assist mode to intermittent mandatory ventilation mode. (From Harrison's Principles of Internal Medicine, 12th ed, p1127)

Unstable isotopes of nitrogen that decay or disintegrate emitting radiation. N atoms with atomic weights 12, 13, 16, 17, and 18 are radioactive nitrogen isotopes.

The outer margins of the thorax containing SKIN, deep FASCIA; THORACIC VERTEBRAE; RIBS; STERNUM; and MUSCLES.

Devices that cause a liquid or solid to be converted into an aerosol (spray) or a vapor. It is used in drug administration by inhalation, humidification of ambient air, and in certain analytical instruments.

The determination of oxygen-hemoglobin saturation of blood either by withdrawing a sample and passing it through a classical photoelectric oximeter or by electrodes attached to some translucent part of the body like finger, earlobe, or skin fold. It includes non-invasive oxygen monitoring by pulse oximetry.

The motor nerve of the diaphragm. The phrenic nerve fibers originate in the cervical spinal column (mostly C4) and travel through the cervical plexus to the diaphragm.

A sudden intense and continuous aggravation of a state of asthma, marked by dyspnea to the point of exhaustion and collapse and not responding to the usual therapeutic efforts.

The cartilaginous and membranous tube descending from the larynx and branching into the right and left main bronchi.

The vapor state of matter; nonelastic fluids in which the molecules are in free movement and their mean positions far apart. Gases tend to expand indefinitely, to diffuse and mix readily with other gases, to have definite relations of volume, temperature, and pressure, and to condense or liquefy at low temperatures or under sufficient pressure. (Grant & Hackh's Chemical Dictionary, 5th ed)

Any of the ruminant mammals with curved horns in the genus Ovis, family Bovidae. They possess lachrymal grooves and interdigital glands, which are absent in GOATS.

The upper part of the trunk between the NECK and the ABDOMEN. It contains the chief organs of the circulatory and respiratory systems. (From Stedman, 25th ed)

Atomic species differing in mass number but having the same atomic number. (Grant & Hackh's Chemical Dictionary, 5th ed)

Studies comparing two or more treatments or interventions in which the subjects or patients, upon completion of the course of one treatment, are switched to another. In the case of two treatments, A and B, half the subjects are randomly allocated to receive these in the order A, B and half to receive them in the order B, A. A criticism of this design is that effects of the first treatment may carry over into the period when the second is given. (Last, A Dictionary of Epidemiology, 2d ed)

Developmental or acquired stricture or narrowing of the LARYNX. Symptoms of respiratory difficulty depend on the degree of laryngeal narrowing.

The volume of air contained in the lungs at the end of a maximal inspiration. It is the equivalent to each of the following sums: VITAL CAPACITY plus RESIDUAL VOLUME; INSPIRATORY CAPACITY plus FUNCTIONAL RESIDUAL CAPACITY; TIDAL VOLUME plus INSPIRATORY RESERVE VOLUME plus functional residual capacity; or tidal volume plus inspiratory reserve volume plus EXPIRATORY RESERVE VOLUME plus residual volume.

The mixture of gases present in the earth's atmosphere consisting of oxygen, nitrogen, carbon dioxide, and small amounts of other gases.

Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA).

The application of heat to raise the temperature of the environment, ambient or local, or the systems for accomplishing this effect. It is distinguished from HEAT, the physical property and principle of physics.

Three-dimensional representation to show anatomic structures. Models may be used in place of intact animals or organisms for teaching, practice, and study.

Hospital units providing continuing surveillance and care to acutely ill newborn infants.

Gases or volatile liquids that vary in the rate at which they induce anesthesia; potency; the degree of circulation, respiratory, or neuromuscular depression they produce; and analgesic effects. Inhalation anesthetics have advantages over intravenous agents in that the depth of anesthesia can be changed rapidly by altering the inhaled concentration. Because of their rapid elimination, any postoperative respiratory depression is of relatively short duration. (From AMA Drug Evaluations Annual, 1994, p173)

The technology of transmitting light over long distances through strands of glass or other transparent material.

A gamma-emitting radionuclide imaging agent used for the diagnosis of diseases in many tissues, particularly in cardiovascular and cerebral circulation.

Community health and NURSING SERVICES providing coordinated multiple services to the patient at the patient's homes. These home-care services are provided by a visiting nurse, home health agencies, HOSPITALS, or organized community groups using professional staff for care delivery. It differs from HOME NURSING which is provided by non-professionals.

The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)

Cessation of heart beat or MYOCARDIAL CONTRACTION. If it is treated within a few minutes, heart arrest can be reversed in most cases to normal cardiac rhythm and effective circulation.

Imaging methods that result in sharp images of objects located on a chosen plane and blurred images located above or below the plane.

A type of lung inflammation resulting from the aspiration of food, liquid, or gastric contents into the upper RESPIRATORY TRACT.

Air pollutants found in the work area. They are usually produced by the specific nature of the occupation.

Stable xenon atoms that have the same atomic number as the element xenon, but differ in atomic weight. Xe-124, 126, 128-131, 134, and 136 are stable xenon isotopes.

The position or attitude of the body.

Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.

Process of administering an anesthetic through injection directly into the bloodstream.

A central respiratory stimulant with a brief duration of action. (From Martindale, The Extra Pharmocopoeia, 30th ed, p1225)

An infant whose weight at birth is less than 1500 grams (3.3 lbs), regardless of gestational age.

A class of statistical methods applicable to a large set of probability distributions used to test for correlation, location, independence, etc. In most nonparametric statistical tests, the original scores or observations are replaced by another variable containing less information. An important class of nonparametric tests employs the ordinal properties of the data. Another class of tests uses information about whether an observation is above or below some fixed value such as the median, and a third class is based on the frequency of the occurrence of runs in the data. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed, p1284; Corsini, Concise Encyclopedia of Psychology, 1987, p764-5)

The age of the conceptus, beginning from the time of FERTILIZATION. In clinical obstetrics, the gestational age is often estimated as the time from the last day of the last MENSTRUATION which is about 2 weeks before OVULATION and fertilization.

That portion of the body that lies between the THORAX and the PELVIS.

A respiratory support system used to remove mucus and clear airway by oscillating pressure on the chest.

All-purpose surfactant, wetting agent, and solubilizer used in the drug, cosmetics, and food industries. It has also been used in laxatives and as cerumenolytics. It is usually administered as either the calcium, potassium, or sodium salt.

Modeling breathing-zone concentrations of airborne contaminants generated during compressed air spray painting. (1/417)

This paper presents a mathematical model to predict breathing-zone concentrations of airborne contaminants generated during compressed air spray painting in cross-flow ventilated booths. The model focuses on characterizing the generation and transport of overspray mist. It extends previous work on conventional spray guns to include exposures generated by HVLP guns. Dimensional analysis and scale model wind-tunnel studies are employed using non-volatile oils, instead of paint, to produce empirical equations for estimating exposure to total mass. Results indicate that a dimensionless breathing zone concentration is a nonlinear function of the ratio of momentum flux of air from the spray gun to the momentum flux of air passing through the projected area of the worker's body. The orientation of the spraying operation within the booth is also very significant. The exposure model requires an estimate of the contaminant generation rate, which is approximated by a simple impactor model. The results represent an initial step in the construction of more realistic models capable of predicting exposure as a mathematical function of the governing parameters. (+info)

Mathematical models for predicting indoor air quality from smoking activity. (2/417)

Much progress has been made over four decades in developing, testing, and evaluating the performance of mathematical models for predicting pollutant concentrations from smoking in indoor settings. Although largely overlooked by the regulatory community, these models provide regulators and risk assessors with practical tools for quantitatively estimating the exposure level that people receive indoors for a given level of smoking activity. This article reviews the development of the mass balance model and its application to predicting indoor pollutant concentrations from cigarette smoke and derives the time-averaged version of the model from the basic laws of conservation of mass. A simple table is provided of computed respirable particulate concentrations for any indoor location for which the active smoking count, volume, and concentration decay rate (deposition rate combined with air exchange rate) are known. Using the indoor ventilatory air exchange rate causes slightly higher indoor concentrations and therefore errs on the side of protecting health, since it excludes particle deposition effects, whereas using the observed particle decay rate gives a more accurate prediction of indoor concentrations. This table permits easy comparisons of indoor concentrations with air quality guidelines and indoor standards for different combinations of active smoking counts and air exchange rates. The published literature on mathematical models of environmental tobacco smoke also is reviewed and indicates that these models generally give good agreement between predicted concentrations and actual indoor measurements. (+info)

Effect of temperature on lung function and symptoms in chronic obstructive pulmonary disease. (3/417)

The present study investigated whether falls in environmental temperature increase morbidity from chronic obstructive pulmonary disease (COPD). Daily lung function and symptom data were collected over 12 months from 76 COPD patients living in East London and related to outdoor and bedroom temperature. Questionnaires were administered which asked primarily about the nature of night-time heating. A fall in outdoor or bedroom temperature was associated with increased frequency of exacerbation, and decline in lung function, irrespective of whether periods of exacerbation were excluded. Forced expiratory volume in one second (FEV1) and forced vital capacity (FVC) fell markedly by a median of 45 mL (95% percentile range: -113-229 mL) and 74 mL (-454-991 mL), respectively, between the warmest and coolest week of the study. The questionnaire revealed that 10% had bedrooms <13 degrees C for 25% of the year, possibly because only 21% heated their bedrooms and 48% kept their windows open in November. Temperature-related reduction in lung function, and increase in exacerbations may contribute to the high level of cold-related morbidity from chronic obstructive pulmonary disease. (+info)

A 15-week experimental exposure of pigs to airborne dust with added endotoxin in a continuous flow exposure chamber. (4/417)

The purpose of this study was to evaluate the effect of longterm exposure to airborne dust and endotoxin on the respiratory system of pigs. A continuous flow exposure chamber was built for the purpose of exposing pigs to selected airborne contaminants. Pigs (n = 6) were exposed to a combination of a very fine corn/soybean meal (40.6 mg/m3) with added lipopolysaccharide (LPS; 12.4 microg/m3) for 8 h/d over 5 d for 15 wk (75 d of exposure). Control pigs (n = 6) were housed in a room with minimal contamination of these airborne contaminants. Surprisingly, dust in the exposure chamber and the control room was highly contaminated with peptidoglycan. Changes in the lung were monitored by collecting bronchoalveolar lavage (BAL) fluid for cytology at 5 different time points throughout the exposure period. Blood samples were collected at the same time for hematology. A non-specific respiratory inflammatory response was found in exposed and control pigs, as suggested by the increased neutrophils in BAL fluid and the small inflammatory areas in the lung tissue. No macroscopic lung lesions were observed in control or exposed pigs. The findings in the control pigs imply that even low dust concentrations and possibly peptidoglycan contamination can induce cellular changes in the BAL fluid and that a true control pig does not exist. In addition, the exposed pigs developed a mild eosinophilia, indicating an allergic response to the airborne contaminants. (+info)

Buildings operations and ETS exposure. (5/417)

Mechanical systems are used in buildings to provide conditioned air, dissipate thermal loads, dilute contaminants, and maintain pressure differences. The characteristics of these systems and their operations h implications for the exposures of workers to environmental tobacco smoke (ETS) and for the control of these exposures. This review describes the general features of building ventilation systems and the efficacy of ventilation for controlling contaminant concentrations. Ventilation can reduce the concentration of ETS through dilution, but central heating, ventilating, and air conditioning (HVAC) can also move air throughout a building that has been contaminated by ETS. An understanding of HVAC systems is needed to develop models for exposures of workers to ETS. (+info)

Effects of aqueous extracts of PM(10) filters from the Utah valley on human airway epithelial cells. (6/417)

We hypothesized that the reduction in hospital respiratory admissions in the Utah Valley during closure of a local steel mill in 1986-1987 was attributable in part to decreased toxicity of ambient air particles. Sampling filters for particulate matter < 10 micrometer (PM(10)) were obtained from a Utah Valley monitoring station for the year before (year 1), during (year 2), and after (year 3) the steel mill closure. Aqueous extracts of the filters were analyzed for metal content and oxidant production and added to cultures of human respiratory epithelial (BEAS-2B) cells for 2 or 24 h. Year 2 dust contained the lowest concentrations of soluble iron, copper, and zinc and showed the least oxidant generation. Only dust from year 3 caused cytotoxicity (by microscopy and lactate dehydrogenase release) at 500 microgram/ml. Year 1 and year 3, but not year 2, dust induced expression of interleukin-6 and -8 in a dose-response fashion. The effects of ambient air particles on human respiratory epithelial cells vary significantly with time and metal concentrations. (+info)

Airborne infection in a fully air-conditioned hospital. II. Transport of gaseous and airborne particulate material along ventilated passageways. (7/417)

A mathematical model is described for the transport of gaseous or airborne particulate material between rooms along ventilated passageways. Experimental observations in three hospitals lead to a value of about 0.06 m.2/sec. for the effective diffusion constant in air without any systematic directional flow. The 'constant' appears to increase if there is any directional flow along the passage, reaching about 0.12 m. 2/sec. at a flow velocity of 0.04 m./sec. Together with previously published methods the present formulae make it possible to calculate the expected average amounts of gaseous or particulate material that will be transported from room to room in ventilated buildings in which the ventilation and exchange airflows can be calculated. The actual amounts transported in occupied buildings, however, vary greatly from time to time. (+info)

Office equipment and supplies: a modern occupational health concern? (8/417)

The Helsinki Office Environment Study, a population-based cross-sectional study was carried out in Finland in 1991 among 2,678 workers in 41 randomly selected office buildings. The aim was to evaluate the relations between work with office equipment and supplies and the occurrence of eye, nasopharyngeal, skin, and general symptoms (often denoted as sick building syndrome (SBS)), chronic respiratory symptoms, and respiratory infections. Work with self-copying paper was significantly related to weekly work-related eye, nasopharyngeal, and skin symptoms, headache and lethargy, as well as to the occurrence of wheezing, cough, mucus production, sinusitis, and acute bronchitis. Photocopying was related to nasal irritation, and video display terminal work to eye symptoms, headache, and lethargy. (+info)

Look up ventilation or ventilate in Wiktionary, the free dictionary. Ventilation may refer to: Ventilation (physiology), the ... the expulsion of heat and smoke from a fire building Ventilation (mining), flow of air to the underground workings of a mine of ... a machine designed to move breathable air into and out of the lungs Ventilation (architecture), the process of "changing" or ... This disambiguation page lists articles associated with the title Ventilation. If an internal link led you here, you may wish ...

https://en.wikipedia.org/wiki/Ventilation

... is best suited for taller spaces (higher than 3 meters [10 feet]). Standard mixing ventilation may be ... Hence, whether displacement ventilation could help with saving energy is still debated. In general, displacement ventilation is ... Displacement ventilation systems are appropriate in space where high ventilation is required, such as classrooms, conference ... Some studies have demonstrated that displacement ventilation may save energy as compared to standard mixing ventilation, ...

https://en.wikipedia.org/wiki/Displacement_ventilation

Ventilation (architecture) Stack effect Underground mine ventilation Courtyard Lightwell Skylight Atrium (architecture) Media ... Ventilation, Tunnels, Mine ventilation, All stub articles, Tunnel stubs). ... In architecture, an airshaft is a small, vertical space within a tall building which permits ventilation of the building's ... In subterranean civil engineering, ventilation shafts, also known as airshafts or vent shafts, are vertical passages used in ...

https://en.wikipedia.org/wiki/Ventilation_shaft

... , sometimes called prone positioning or proning, refers to mechanical ventilation with the patient lying face- ... The purpose of prone ventilation is to better facilitate lung mechanics to improve ventilation/perfusion ratio mismatches in ... in the prone ventilation group compared to the supine ventilation. This reduction in inflammation was attributed to a decrease ... The panel cited the few studies that showed morality benefit from prone ventilation in ARDS and that this was a low-cost ...

https://en.wikipedia.org/wiki/Prone_ventilation

It can provide a much higher air-exchange rate in comparison with single-sided ventilation. Stack ventilation: This ventilation ... Natural Ventilation Strategies Window Master Analysis of Ventilation Efficiency and Effective Ventilation Flow Rate for Wind- ... Although cross ventilation is generally more direct at its job than stack ventilation, its cons include its effects being ... The ventilation rate for single-sided ventilation can be accurately predicted by combining different models for mean flow, ...

https://en.wikipedia.org/wiki/Cross_ventilation

... natural ventilation, or mixed-mode ventilation (hybrid ventilation). Mechanical ventilation is the intentional fan driven flow ... Cross ventilation is a phenomenon of natural ventilation. Mixed-mode ventilation systems use both mechanical and natural ... Personalized ventilation provides a much higher ventilation effectiveness than conventional mixing ventilation systems by ... ventilation Mixing ventilation Displacement ventilation Dedicated subaerial air supply Demand-controlled ventilation (DCV, also ...

https://en.wikipedia.org/wiki/Ventilation_(architecture)

Eric Gingerich (2015). "What is Ventilation Shutdown (VSD/VSD+)?". Veterinarians Against Ventilation Shutdown. Retrieved ... Ventilation shutdown (VSD) is a means to kill livestock by suffocation and heat stroke in which airways to the building in ... The practice of ventilation shutdown has been called cruel by many animal welfare and animal right groups such as the Humane ... The addition of carbon dioxide or additional heat to the enclosure is known as ventilation shutdown plus (VSD+). The term ...

https://en.wikipedia.org/wiki/Ventilation_shutdown

Wind driven ventilation can be classified as cross ventilation and single-sided ventilation. Wind driven ventilation depends on ... There are two types of natural ventilation occurring in buildings: wind driven ventilation and buoyancy-driven ventilation. ... The natural ventilation flow rate for buoyancy-driven natural ventilation with vents at two different heights can be estimated ... While natural ventilation eliminates electrical energy consumed by fans, overall energy consumption of natural ventilation ...

https://en.wikipedia.org/wiki/Passive_ventilation

... , assisted ventilation or intermittent mandatory ventilation (IMV), is the medical term for using a ... If non-invasive ventilation or negative-pressure ventilation is used, then an airway adjunct is not needed. Pain medicine such ... These styles of ventilation had control breaths that patients could breath between. Mechanical ventilation is indicated when a ... This type of ventilation is primarily used in neonates and pediatric patients who are failing conventional ventilation. The ...

https://en.wikipedia.org/wiki/Mechanical_ventilation

... positive pressure ventilation, where air (or another gas mix) is pushed into the trachea, and negative pressure ventilation, ... Mechanical ventilation is a method to mechanically assist or replace spontaneous breathing. This may involve a machine called a ... Pulmonary ventilation (and hence external parts of respiration) is achieved through manual insufflation of the lungs either by ... Mechanical ventilation is termed "invasive" if it involves any instrument penetrating through the mouth (such as an ...

https://en.wikipedia.org/wiki/Artificial_ventilation

... is the branch of ventilation specialising in the treatment of air from kitchens. It addresses the problems ... An adequate kitchen ventilation system should: Remove cooking fumes at the source, i.e. as close as possible to the cooking ... Kitchen ventilation equipment includes an extractor hood or canopy, and a filtering system. The system's fan may be located in ... Inadequate ventilation can cause stress, contributing to unsafe working conditions and high staff turnover. Ensure that air ...

https://en.wikipedia.org/wiki/Kitchen_ventilation

Minute volume comprises the sum of alveolar ventilation and dead space ventilation. That is: V ˙ = V ˙ A + V ˙ D {\displaystyle ... represents dead space ventilation. Zuurbier, M., Hoek, G., van den Hazel, P., Brunekreef, B. (2009). "Minute ventilation of ... Minute ventilation (or respiratory minute volume or minute volume) is the volume of gas inhaled (inhaled minute volume) or ... Minute ventilation during moderate exercise may be between 40 and 60 litres per minute. Hyperventilation is the term for having ...

https://en.wikipedia.org/wiki/Minute_ventilation

In respiratory physiology, specific ventilation is defined as the ratio of the volume of gas entering a region of the lung (ΔV ... The distribution of specific ventilation within the lung can be inferred using Multiple Breath Washout (MBW) experiments or ... Continuous distributions of specific ventilation recovered from inert gas washout, Journal of Applied Physiology, 1978 vol. 44 ...

https://en.wikipedia.org/wiki/Specific_ventilation

... (CV) is a back-up system of alveolar ventilation that can bypass the normal route of airflow when ... Mitzner, W. (1 January 2006). "VENTILATION , Collateral". VENTILATION , Collateral. pp. 434-438. doi:10.1016/B0-12-370879-6/ ... Collateral ventilation also serves to modulate imbalances in ventilation and perfusion a feature of many diseases. The pathways ... Collateral ventilation is not present in horses who have a poor tolerance to airway obstruction but it is present in dogs who ...

https://en.wikipedia.org/wiki/Collateral_ventilation

Hydraulic ventilation is another method of ventilation that is very useful if vertical ventilation or positive pressure ... Ventilation Basics The When and Why of Ventilation Equipment Used in Ventilation (Articles with short description, Short ... Negative pressure ventilation is not used as much as positive pressure ventilation for the reason that positive pressure can ... "Negative Pressure Ventilation". Ventry Solutions. Retrieved 2020-11-05. "Throw Back to Basics: Hydraulic Ventilation". Fire ...

https://en.wikipedia.org/wiki/Ventilation_(firefighting)

Flow-through ventilation is the main ventilation circuit for the mine. Air enters the mine from surface via a shaft, ... The largest component of the operating cost for mine ventilation is electricity to power the ventilation fans, which may ... ventilation raise or adit. The air is distributed through the mine via internal ventilation raises and ramps, and flows are ... and the mining company may have to increase the ventilation flow, in particular where ventilation may be required to cool the ...

https://en.wikipedia.org/wiki/Underground_mine_ventilation

Mandatory minute ventilation is a mode which requires the operator to determine what the appropriate minute ventilation for the ... Adaptive Support Ventilation is a positive pressure mode of mechanical ventilation that is closed-loop controlled. In this mode ... Intermittent Mandatory Ventilation (IMV) refers to any mode of mechanical ventilation where a regular series of breaths are ... mandatory ventilation with and without pressure support ventilation in weaning patients with COPD from mechanical ventilation ...

https://en.wikipedia.org/wiki/Intermittent_mandatory_ventilation

... or V/Q defects are defects in the total lung ventilation/perfusion ratio (V/Q ratio). It is a ... Ventilation Scan is done first as it is easy to wash out tracer gas from lungs with the help of hyperventilation than clearing ... If ventilation is abnormal or low, increasing the tidal volume or the rate may result in the poorly ventilated area receiving ... Ventilation Scan: Takes 15 to 20 minutes. A radioactive tracer gas is inhaled and then this radioactive tracer gas is traced ( ...

https://en.wikipedia.org/wiki/Ventilation_perfusion_mismatch

... ventilation Volume controlled ventilation Controlled ventilation Volume targeted ventilation Continuous spontaneous ventilation ... Continuous mandatory ventilation (CMV) is a mode of mechanical ventilation in which breaths are delivered based on set ... "Controlled mechanical ventilation" is an outdated expansion for "CMV"; "continuous mandatory ventilation" is now accepted ... Names such as: volume control ventilation, and volume cycled ventilation in modern usage refer to the Assist Control mode. ...

https://en.wikipedia.org/wiki/Continuous_mandatory_ventilation

... is the relationship between ventilation and perfusion, represented by the ventilation-perfusion ... A pulmonary ventilation-perfusion scan (lung V/Q scan) can be used to diagnose the V/Q mismatch. A ventilation scan is used to ... Since ventilation exceeds perfusion, the V/Q ratio is increased at the apex of the lungs. When the ventilation-perfusion ratio ... Ventilation-perfusion coupling is the relationship between ventilation and perfusion processes, which take place in the ...

https://en.wikipedia.org/wiki/Ventilation-perfusion_coupling

"ERV". Understanding Ventilation: How to Design, Select, and Install Residential Ventilation Systems. June 4, 2009. December 9, ... Ventilation, Heating, ventilation, and air conditioning, Low-energy building, Energy recovery). ... To use proper ventilation; recovery is a cost-efficient, sustainable and quick way to reduce global energy consumption and give ... Nearly half of global energy is used in buildings, and half of heating/cooling cost is caused by ventilation when it is done by ...

https://en.wikipedia.org/wiki/Energy_recovery_ventilation

... refers to a hybrid approach to space conditioning that uses a combination of natural ventilation from ... It then integrates the use of air conditioning when and where it is necessary, with the use of natural ventilation whenever it ... v t e (Articles with short description, Short description matches Wikidata, Ventilation, All stub articles, Architecture stubs) ...

https://en.wikipedia.org/wiki/Mixed-mode_ventilation

... (IRV) is not necessarily a mode of mechanical ventilation though it may be referred to as such. IRV ... IRV can be performed during pressure-controlled ventilation (PC-IRV) or volume-controlled ventilation(VC-IRV). Neither is ... Comparison of airway pressure release ventilation and volume-controlled inverse ratio ventilation". Am J Respir Crit Care Med. ... 2000). "Prospective randomized trial comparing pressure-controlled ventilation and volume-controlled ventilation in ARDS. For ...

https://en.wikipedia.org/wiki/Inverse_ratio_ventilation

Common reference standards for ventilation: ISO ICS 91.140.30: Ventilation and air-conditioning systems ASHRAE 62.1 & 62.2: The ... and ventilation systems compared to buildings that use open-loop controls with constant ventilation rates. ... Demand controlled ventilation (DCV) is a feedback control method to maintain indoor air quality that automatically adjusts the ... As the sensor reads the increasing amount of carbon dioxide levels in a space, the ventilation increases to dilute the levels. ...

https://en.wikipedia.org/wiki/Demand_controlled_ventilation

... ventilation Pressure-controlled intermittent mandatory ventilation Mechanical ventilation Modes of mechanical ventilation ... Pressure-controlled ventilation may refer to: Pressure-controlled continuous mandatory ... Respiratory therapy This disambiguation page lists articles associated with the title Pressure-controlled ventilation. If an ...

https://en.wikipedia.org/wiki/Pressure-controlled_ventilation

... ventilation Volume controlled intermittent mandatory ventilation Mechanical ventilation Modes of mechanical ventilation ... Volume-controlled ventilation may refer to: Volume controlled continuous mandatory ... Respiratory therapy This disambiguation page lists articles associated with the title Volume-controlled ventilation. If an ...

https://en.wikipedia.org/wiki/Volume-controlled_ventilation

Transtracheal jet ventilation refers to a type of high-frequency ventilation, low tidal volume ventilation provided via a ... High-frequency ventilation is a type of mechanical ventilation which utilizes a respiratory rate greater than four times the ... High-frequency ventilation may be used alone, or in combination with conventional mechanical ventilation. In general, those ... It is a hybrid of conventional mechanical ventilation and high-frequency oscillatory ventilation. It has been used to salvage ...

https://en.wikipedia.org/wiki/High-frequency_ventilation

... (PSV), also known as pressure support, is a spontaneous mode of ventilation. The patient initiates ... MAQUET, "Modes of ventilation in SERVO-i, invasive and non-invasive", 2008 MAQUET Critical Care AB, Order No 66 14 692 MAQUET ... Goodyear-Bruch C, Long LR, Simon P, Clancy RL, Pierce JD (August 2005). "Pressure-support ventilation and diaphragm shortening ... Pierce JD, Wiggins SA, Plaskon C, Glass C (1993). "Pressure support ventilation: reducing the work of breathing during weaning ...

https://en.wikipedia.org/wiki/Pressure_support_ventilation

... which is not considered conventional ventilation and refers to high-frequency ventilation; a low tidal volume ventilation and ... Percutaneous transtracheal ventilation may be mistaken for transtracheal jet ventilation, ... Percutaneous transtracheal ventilation is the delivery of oxygen to the lungs through an over-the-needle catheter inserted ... Ihra G, Gockner G, Kashanipour A, Aloy A (2000). "High-frequency jet ventilation in European and North American institutions: ...

https://en.wikipedia.org/wiki/Percutaneous_transtracheal_ventilation

... is any mode of mechanical ventilation where every breath is spontaneous (i.e., patient ... Some modes of mechanical ventilation require spontaneous ventilation, some of these include: Bilevel positive airway pressure ( ... "Airway pressure release ventilation: an alternative mode of mechanical ventilation in acute respiratory distress syndrome". ... In extreme cases, mechanical ventilation is used when spontaneous breathing is inadequate or ceases entirely. ...

https://en.wikipedia.org/wiki/Continuous_spontaneous_ventilation

Ventilation. Ventilation is a term with different meanings to different people. For the purpose of this webpage, "ventilation" ... Ventilation Frequently Asked Questions. 1. Can COVID-19 be transmitted through HVAC (ventilation) systems?. Some SARS-CoV-2 ... Ventilation in Schools and Child Care Programsplus icon*Interactive School Ventilation Tool ... Ventilation Mitigation Strategies. When indoors, ventilation mitigation strategies can help reduce viral particle concentration ...

https://www.cdc.gov/coronavirus/2019-ncov/community/ventilation.html

The multifaceted approach developed at Vanderbilt University reduces days on ventilation and delirium in critically ill ...

http://www.medscape.com/viewarticle/777967

... 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/perfusion scan involves two nuclear scan tests to measure breathing (ventilation) and circulation ( ...

https://medlineplus.gov/ency/article/003828.htm

Prise en charge des cas graves et critiques de COVID-19 avec ventilation non invasive ou mécanique : données fondées sur les ... Management of severe / critical cases of COVID-19 with non-invasive or mechanical ventilation: based on information as at 1st ... Browsing 2. Regional Office for Africa by Subject "Noninvasive Ventilation". 0-9. A. B. C. D. E. F. G. H. I. J. K. L. M. N. O. ...

https://apps.who.int/iris/handle/10665/1637/browse?authority=Noninvasive+Ventilation&type=mesh

Natural ventilation for infection control in health care settings World Health Organization (‎World Health OrganizationWorld ... Utilisation de la ventilation naturelle pour lutter contre les infections en milieu de soins ... Roadmap to improve and ensure good indoor ventilation in the context of COVID-19 ...

https://extranet.who.int/iris/restricted/browse?locale-attribute=en&type=mesh&authority=Ventilation

... and Shaw tank-type ventilator of 1929 was one of the first negative-pressure machines widely used for mechanical ventilation. ... Airway pressure-release ventilation. Bilevel, or biphasic, ventilation is a relatively new mode of ventilation that has ... What is the proportional assist ventilation mode of mechanical ventilation?. What is the airway pressure-release ventilation ... Indications for Mechanical Ventilation. Many factors affect the decision to begin mechanical ventilation. Because no mode of ...

https://emedicine.medscape.com/article/304068-overview

Dont just imagine your dream kitchen. Make it a reality by visiting a Zephyr Authorized Dealer today ...

https://zephyronline.com/blog/awards/sparkaward_wave/

We want the heat from the cooking to be retained but we dont want the cooking grease to mess up the ventilation system." One U ... The kitchen in this modern cabin is so rustic that it doesnt have a ventilation hood over the stove. (Photo: Marcus Gleysteen ... This open-space kitchen is so open that it doesnt have a ventilation hood or extractor. (Photo: Colin Cadle Photography/Houzz) ... And on that note, I am going out for dinner to where they have proper ventilation, fire suppression and a big hot commercial ...

https://www.treehugger.com/hyperventilation-about-kitchen-ventilation-4868251

Ventilation[edit]. Main article: Ventilation (architecture). Ventilation is the process of changing or replacing air in any ... Demand controlled kitchen ventilation[edit]. Main article: Demand controlled ventilation. Demand controlled kitchen ventilation ... Ventilation energy recovery[edit]. Energy recovery systems sometimes utilize heat recovery ventilation or energy recovery ... Natural ventilation is the ventilation of a building with outside air without using fans or other mechanical systems. It can be ...

https://en.wikipedia.org/wiki/Heating%2C_ventilation%2C_and_air_conditioning

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Centers RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.. ...

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Lyu S, Li J, Yang L, Du X, Liu X, Chuan L, et al. The utilization of aerosol therapy in mechanical ventilation patients: a ... of 611 ICUs from 70 countries reported using aerosol therapy during mechanical ventilation, including noninvasive ventilation, ... Budesonide ameliorates lung injury induced by large volume ventilation. BMC Pulm Med. 2016;16:90. DOIPubMedGoogle Scholar ... Aerosol therapy during mechanical ventilation: an international survey. Intensive Care Med. 2013;39:1048-56. DOIPubMedGoogle ...

https://wwwnc.cdc.gov/eid/article/28/12/22-0347_article

Ventilation can make schools and offices safe from covid-19 - but how?. ...

https://www.newscientist.com/article-topic/ventilation/

... thermoIMAGER infrared cameras, which detect the facade temperature from the ... The thermal imaging camera is connected to the heating or ventilation system, which controls the temperature based on the ...

https://www.micro-epsilon.com/applications/branch/building_automation/Auto-Temperatur-und-Lueftungsregelung/?sLang=en

Yet another ventilation concern! Help please! Greetings! Ive been absent from this site for years, took a long break from ... Yet another ventilation concern! Help please! Safety ... Yet another ventilation concern! Help please! User Name. ...

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Youth Snowboarding AirEvac Ventilation Helmet. Smith Optics 2019 Holt Jr. Air-Evac Ventilation and Self-Adjusting Lifestyle Fit ...

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Browse Panasonic Industrial Ventilation Fans

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The Ventilation Rate Procedure in the standard is based on outdoor air ventilation rates requirements, not on the maintenance ... What does the term demand controlled ventilation (DCV) mean?. Very simply, it is any method used to control ventilation ... The attempted use of the tracer-gas or mass balance method to evaluate ventilation effectiveness, but used for ventilation ... Comfort criteria with respect to human bioeffluents are likely to be satisfied if the ventilation rate results in indoor CO2 ...

https://automatedbuildings.com/news/may01/articles/ebtron/ebt.htm

Draeger Medical Launches New Emergency and Transport Ventilation System. Dec 13, 2006 , Critical Care , ... The product also offers a combination of volume and pressure-controlled and pressure support ventilation across the entire ... Oxylog 3000 provides the flexibility of both comprehensive invasive or non-invasive ventilation support, including the ability ...

https://rtmagazine.com/disorders-diseases/critical-care/draeger-medical-launches-new-emergency-and-transport-ventilation-system/

assisted ventilation Clinical Research Trial Listings on CenterWatch ... mechanical ventilation. To date, the use of proportional assisted. ventilation. methods such as Proportional Assisted. ... ventilation. is one of the most complex and compromised phases of the ventilatory management during mechanical ventilation ... Assessment of Neural Pressure Support Assisted Ventilation and Non-invasive Estimation of Transpulmonary Pressure in ...

https://www.centerwatch.com/clinical-trials/listings/search/?q=assisted+ventilation&page=2

... Ventilation systems are crucial. Their purpose is to avoid explosions by removing flammable gases ... Properly installed ventilation systems greatly reduce the chance of a life-threatening explosion. ...

https://www.boat-ed.com/florida/studyGuide/How-Ventilation-Systems-Work/10101002_30246/

... but many operators will decide that a ventilation upgrade is necessary as well. NIOSH has several stone mine ventilation ... The new MSHA diesel rules have stone mine operators looking hard at possible upgrades to their ventilation systems. There are ... require a lot of ventilation air. The focus of this oil shale work was on the use of jet fans for face area ventilation, and on ... but many operators will decide that a ventilation upgrade is necessary as well. NIOSH has several stone mine ventilation ...

https://www.cdc.gov/niosh/nioshtic-2/20023014.html

Stantecs Christine Spreitzer discusses how you can work with engineers to design the best ventilation system for your ... Explore the best ventilation system design for your situation. Ok, so youre ready to install some ventilation. You can just ... What ventilation is currently in place?. All these factors need to come together for engineers-like my colleagues and I-to ... When it comes to welding, ventilation and exhaust is the most effective way to mitigate hazards caused by exposure. We want to ...

https://www.stantec.com/en/ideas/spotlight/market/dod/breathe-easier-mitigating-welding-hazards-with-ventilation-and-exhaust

DirectPlastics.com now stock Ventilation Eaves Protection Systems. Order online for low prices and fast UK delivery. ...

https://www.directplastics.com/upvc-fascia-boards/white-fascia-boards/eaves-protection-systems

It will provide a wealth of insights from experiences of Quality Ventilation both nationally and internationally. ... Day 2: Quality of Ventilation Systems. 9.30am - 12.00pm. *EPBD issues in relation to IAQ and ventilation and article 19a ... Inspection of ventilation systems outside Europe: Max Sherman, LBNL. *The context in Ireland - changes to Irish regulations and ... Ventilation inspection schemes in France: Adeline Melois, CEREMA. *Ductwork airtightness - why should we care and how to ...

https://www.seai.ie/events/seai-energy-show/industry-expert-talks/quality-ventilation-confe/

... Am J Respir Crit Care Med. 1995 Oct;152(4 Pt 1):1248 ... After 8 to 25 min, none of the patients were able to sustain spontaneous breathing and mechanical ventilation was required to ... 2) Subsequently, during mechanical ventilation, by manipulating the variables of the ventilator we simulated the pattern of ... We conclude that during discontinuation from mechanical ventilation (MV) almost all patients breathe against a high inspiratory ...

https://pubmed.ncbi.nlm.nih.gov/7551378/?dopt=Abstract

Why Ventilation Matters. Proper ventilation necessitates that fresh air is able to find its way in the attic space, while ... Proper ventilation is a simple but effective way to protect your investment and your wallet, and there are ventilation options ... Balanced Ventilation. Balanced ventilation is achieved when intake and exhaust allow for same amount of airflow, because the ... In order for attic ventilation to work effectively, however, the ventilation system must have balanced intake and exhaust. ...

https://www.certainteed.com/residential-roofing/how-proper-attic-ventilation-benefits-your-roof-and-your-wallet/

Non-solar ventilation provides an economical way to passively create high air flow in your boat ...

https://www.marinco.com/en/products/Ventilation

GB2404436B - Ventilation - Google Patents. Ventilation Info. Publication number. GB2404436B. GB2404436B GB0316492A GB0316492A ... 238000009423 ventilation Methods 0.000 title 1 Classifications. * * F-MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; ... ventilation. Prior art date. 2003-07-15. Legal status (The legal status is an assumption and is not a legal conclusion. Google ... GB0316492A 2003-07-15 2003-07-15 Ventilation Expired - Fee Related GB2404436B (en) Priority Applications (1). Application ...

https://patents.google.com/patent/GB2404436

A rescue team had to make a hole in the ceiling in order to access the duct which the dog had somehow entered and become stuck in.

https://news.sky.com/video/dog-rescued-from-ventilation-pipe-in-virginia-11533048

Since mid-2020 when it was disclosed that COVID-19 is airborne, the guidance has been to increase ventilation inside public spaces. (cassbeth.com)

Furthermore, it solves the troubles of the conventional natural or mechanical ventilation systems. (aivc.org)
Hybrid ventilation systems combine the superior properties of natural and mechanical ventilation systems to reduce energy consumption. (aivc.org)
For buildings, particularly the older ones on Campus, that don't have mechanical ventilation systems they benefit from having a valid part of building ventilation called infiltration. (gla.ac.uk)
Reconair maintain all types of mechanical ventilation systems from large scale industrial systems and specialised operating theatre systems for hospitals to commercial and retails systems. (reconair.ie)

The Ministry of Education has provided school boards with funding to optimize and improve ventilation and filtration in schools. (alcdsb.on.ca)
This resource outlines ways you can improve ventilation in your school or childcare program. (schoolnutrition.org)
The SNP Government's £25 million fund to improve ventilation in business premises and reduce the risk of COVID-19 transmission across North Ayrshire and Scotland opens today (Tuesday 23 November) at 15:00. (kennethgibson.org)
An expert advice group chaired by Professor Tim Sharpe from the University of Strathclyde recommended that businesses should be supported to improve ventilation. (kennethgibson.org)
Open their windows to improve ventilation. (who.int)

Properly installed ventilation systems greatly reduce the chance of a life-threatening explosion. (boat-ed.com)

Preparatory work for the construction of the Richelieu mechanical ventilation station (MVS), which began in August 2022, will end the week of October 10, 2022. (stm.info)
Portland, OR, Sept. 30, 2022 (GLOBE NEWSWIRE) -- According to the report published by Allied Market Research, the global industrial ventilation equipment market garnered $9.0 billion in 2021, and is estimated to generate $18.2 billion by 2031, manifesting a CAGR of 7.3% from 2022 to 2031. (yahoo.com)

A mechanical ventilation station is an infrastructure that is equipped with two fans designed to extract hot air from the métro network through inlets fitted with air vents. (stm.info)
Constructions of the roof, floor, external walling, windows and vents of the base case shell were based on good practice recommendations, as were the specifications for ventilation, thermal and lighting conditions in the simulations. (gsa.ac.uk)

Razer presented the "Razer Zephyr," an active ventilation mask with a cyberpunk design, at the online event "Razer Con 2021. (guru3d.com)
In addition to having a ventilation fan that allows for easy breathing and an RGB illumination feature, it is a mask that matches to the product version of "Project Hazel" that will be released at "CES 2021. (guru3d.com)
Based on region, Asia-Pacific held the largest share in 2021, contributing to nearly half of the total industrial ventilation equipment market. (yahoo.com)
Based on ventilation type, the dilution ventilation segment held the highest share in 2021, accounting for more than three-fifths of the global industrial ventilation equipment market, and is expected to continue its leadership status during the forecast period. (yahoo.com)
Based on system type, the air supply system segment accounted for the highest share in 2021, contributing to around three-fourths of the global industrial ventilation equipment market, and is expected to maintain its lead in terms of revenue during the forecast period. (yahoo.com)
Based on end use industry, the building products segment accounted for the highest share in 2021, holding more than one-fourth of the global industrial ventilation equipment market, and is expected to continue its leadership status during the forecast period. (yahoo.com)
First Minister Nicola Sturgeon announced the £25m Ventilation Fund in September 2021. (kennethgibson.org)
The item "OEM Volvo Crankcase Ventilation Separator 21373547 22877306 + GASKET 20532891" is in sale since Tuesday, April 27, 2021. (enginecomponents.biz)

Opening channels below the shell it can be fine-tuned to give you the exact amount of ventilation you need for maximized comfort. (bolle.com)
Without the correct amount of ventilation, a cooling appliance cannot run or cool inside properly, longer running times will result and therefore higher energy costs will be incurred. (aeg.ie)
Well, it's just as frustrating for your home to be blocked off from fresh air when you don't have the proper amount of ventilation. (tricityappliance.com)

Sustainable Energy Authority of Ireland (SEAI) together with the Air Infiltration and Ventilation Centre (AIVC) are organising a conference entitled " Quality ventilation is the key to achieving low energy healthy buildings " to be held on 27-28 March 2019 in Dublin, Ireland. (seai.ie)
Another important change is the recognition that unbalanced ventilation affects natural infiltration differently than balanced ventilation does. (homeenergy.org)
This work investigates the impact of space planning, interior porosity and variable occupancy on the energy use in offices that is attributable to ventilation/infiltration and air movement. (gsa.ac.uk)

Ventilation system upgrades or improvements can increase the delivery of clean air and dilute potential contaminants. (cdc.gov)
After writing the post " Worrying about kitchen fans is exhausting ," where I talked about how important kitchen exhaust was, I got a comment from a reader who said that recirculating fans were OK if they were combined with a proper ventilation system. (treehugger.com)
We want the heat from the cooking to be retained but we don't want the cooking grease to mess up the ventilation system. (treehugger.com)
One U.K. guide to ventilation for houses designed to Passive House standards says, "In kitchens recirculating cooker hoods are recommended to be separated from the MVHR (mechanical ventilation and heat recovery) system. (treehugger.com)
The thermal imaging camera is connected to the heating or ventilation system, which controls the temperature based on the temperature data and regulates the temperature in those areas where there is a deviation from the target. (micro-epsilon.com)
Smith Optics 2019 Holt Jr. Air-Evac Ventilation and Self-Adjusting Lifestyle Fit System. (shopping.com)
In order for attic ventilation to work effectively, however, the ventilation system must have balanced intake and exhaust. (certainteed.com)
På Munters nöjer vi oss inte bara med utveckling och tillverkning av komponenter, vi levererar det system eller en skräddarsydda lösning, som passar kundens behov av ventilation bäst. (munters.com)
This heat surplus result in a need for cooling during most of the year, typically also during the winter, and often the needed cooling is provided by a mechanical ventilation system with integrated mechanical cooling. (aivc.org)
This study proposes the hybrid ventilation system and its design methods for high-rise buildings. (aivc.org)
The proposed hybrid ventilation system uses natural driving power for ventilation based on air flow in the whole building and indoor and outdoor pressure distributions. (aivc.org)
This paper presents theories and a process for duct design for natural ventilation which forms the basis of a hybrid ventilation system in high-rise buildings. (aivc.org)
On the other hand, the PassivHaus compact system integrates ventilation (HRV/ERV) with heating, supplemented with a small heat pump or solar. (bcit.ca)
Some of our buildings have a building management system where we can check the effectiveness of the ventilation systems through CO2 sensors. (gla.ac.uk)
And what can make them happier than an intelligent, digital residential ventilation system? (ebmpapst.com)
The FDA has notified health care professionals about a Class I recall of Maquet's FLOW-i Anesthesia System, due to complaints of a dislodged part preventing ventilation. (pharmacytimes.com)
Hospitals use the system to administer anesthesia while providing ventilation to a variety of patients ranging from neonates to older adults who have limited or no ability to breathe. (pharmacytimes.com)
Our adjustable ventilation system is easy to use and enables you to control the amount of air coming in your helmet. (bolle.com)
The research provides detailed segmentation of the global industrial ventilation equipment market based on Ventilation Type, System Type, End User Industry, and region. (yahoo.com)
Using the MR810 Humidifier, an F&P humidification chamber and the Evatherm™ Breathing Circuit, the F&P 810 System provides humidification for noninvasive ventilation in the home. (fphcare.com)
As air balancers, we are in a unique position to help businesses minimize the spread of the virus through the existing ventilation system. (csemag.com)
We are encouraging building owners to get their ventilation system tested by a certified air balancing company. (csemag.com)
If an unbalanced dwelling-unit ventilation (DUV) system is used, its airflow rate must be higher than would be the case if a balanced ventilation system were used. (homeenergy.org)
Balanced pressure / heat exchanger ventilation systems extract warm damp air from living spaces and pass it through a heat-exchanger to heat up dry air which the system brings in from outside. (consumer.org.nz)
Video image captures showing effect of heater-cooler unit orientation on smoke dispersal in a cardiac surgery room and transmission of Mycobacterium chimaera during cardiac surgery despite an ultraclean air ventilation system. (cdc.gov)
The SuperNO 2 VA™ nasal PAP ventilation device is available in medium and large sizes and is offered as a standalone mask with a head strap and as a system, kitted with a hyperinflation bag. (vyaire.com)
The three major components of an HVAC system are heating, ventilation, and air conditioning. (interioridea.net)
Whether you're in need of a single exhaust fan or want to add a whole-home ventilation system to your house, the experts at Tri-City Heating and Cooling are here to help. (tricityappliance.com)

[ 1 ] The Drinker and Shaw tank-type ventilator of 1929 was one of the first negative-pressure machines widely used for mechanical ventilation. (medscape.com)
Volume-cycled ventilation is the most common form of ventilator cycling used in adult medicine because it provides a consistent breath-to-breath tidal volume. (medscape.com)
2) Subsequently, during mechanical ventilation, by manipulating the variables of the ventilator we simulated the pattern of spontaneous breathing the patients had just before the re-institution of mechanical ventilation. (nih.gov)
Esprit is designed to enable better patient-ventilator synchrony during volume-controlled ventilation, even in patients demanding higher flow rates than are set on the ventilator. (rtmagazine.com)
These new methods in ventilation monitoring help clinicians monitor tracheal pressure regardless of the ventilator setting and calculate FRC without interruption of ventilation therapy. (rtmagazine.com)
The SERVO-i ventilator is intended for treatment and monitoring of all patients-neonatal, pediatric, and adults-who require mechanical ventilation. (rtmagazine.com)
Of the study population , 157 patients were successfully weaned from prolonged mechanical ventilation and discharged, 186 patients passed away in the hospital , and 60 patients remained ventilator -dependent. (bvsalud.org)

The residential ventilation requirements address three primary areas: dwelling-unit ventilation, demand-controlled exhaust ventilation, and contaminant source control. (homeenergy.org)

This study describes a high-frequency oscillatory ventilation (HFOV) protocol for term and near-term infants with acute respiratory failure (ARF) and reports results of its prospective application. (unboundmedicine.com)
High-frequency oscillatory ventilation (HFOV) remains an option for the management of critically ill children when conventional mechanical ventilation fails. (bvsalud.org)

Heated respiratory humidification can increase patient comfort and tolerance to noninvasive ventilation in the home. (fphcare.com)
Noninvasive ventilation (NIV) is the delivery of respiratory pressure support via a mask and may be used to treat respiratory failure, such as chronic obstructive pulmonary disease (COPD). (fphcare.com)
Official ERS/ATS clinical practice guidelines: noninvasive ventilation for acute respiratory failure. (fphcare.com)
Branson, R. D. & Gentile, M. A. Is humidification always necessary during noninvasive ventilation in the hospital? (fphcare.com)

It is a device designed to maintain life support for patients in severe respiratory failure who require intubation and invasive mechanical ventilation. (who.int)
We collected data on their age, sex , causes of acute respiratory failure leading to prolonged mechanical ventilation , comorbidities, receipt of a tracheostomy or not, weaning status, discharge conditions, and long-term outcomes. (bvsalud.org)

Ventilating or ventilation (the "V" in HVAC) is the process of exchanging or replacing air in any space to provide high indoor air quality which involves temperature control, oxygen replenishment, and removal of moisture, odors, smoke, heat, dust, airborne bacteria, carbon dioxide, and other gases. (wikipedia.org)
By using Carbon Dioxide (CO2) sensor sampling we can get an indication on the current air quality within a room and an indication of the efficiency of the room's ventilation in use. (gla.ac.uk)
They tested this hypothesis by comparing the volume of carbon dioxide removed per breath with nasal versus combined oral-nasal mask ventilation in nonparalyzed, apneic, adult subjects during induction of general anesthesia. (vyaire.com)

Since the onset of the COVID-19 pandemic, ALCDSB has completed extensive work to improve and optimize ventilation and air filtration in our schools. (alcdsb.on.ca)

The product also offers a combination of volume and pressure-controlled and pressure support ventilation across the entire breathing cycle. (rtmagazine.com)
The subjects were kept in supine Fowler's position t, ventilating for 10 minutes in the assist-controlled (A/C) ventilation mode the synchronized intermittent mandatory ventilation (SIMV) mode, pressure support ventilation (PSV) 18 and 10, and with nebulization through a T-piece. (bvsalud.org)

Glucocorticoid aerosol is a common inhalation therapy in patients receiving invasive mechanical ventilation. (cdc.gov)
Invasive and non-invasive mechanical ventilation. (fphcare.com)
The study revealed that successfully weaned from invasive mechanical ventilation and the receipt of a tracheostomy were influential factors in the five-year survival rate of patients requiring prolonged mechanical ventilation . (bvsalud.org)
Nevertheless, two key factors that can improve their long-term survival are successfully weaned from invasive mechanical ventilation and receipt of a tracheostomy . (bvsalud.org)

Filtration through central heating, ventilation and air conditioning (HVAC) systems and/or in-room air cleaners (portable or permanently mounted). (cdc.gov)
Heating, ventilation, and air conditioning ( HVAC ) [1] is the use of various technologies to control the temperature , humidity , and purity of the air in an enclosed space. (wikipedia.org)
Refrigeration " is sometimes added to the field's abbreviation as HVAC&R or HVACR , or "ventilation" is dropped, as in HACR (as in the designation of HACR-rated circuit breakers ). (wikipedia.org)
HVAC systems can provide ventilation, and maintain pressure relationships between spaces. (wikipedia.org)
This work includes more frequent inspection and servicing of our existing ventilation systems to ensure that they are in good working order and optimizing air quality through existing or new Heating Ventilation and Air Conditioning (HVAC) systems and the use of High Efficiency Particulate Air (HEPA) filtration units. (alcdsb.on.ca)
HVAC or heating and ventilation air conditioning is an important process used to regulate temperature, humidity, and air purity within a building. (interioridea.net)
A typical HVAC apparatus features two types of ventilation. (interioridea.net)
The V in HVAC, or ventilation, is the process of replacing or exchanging air within a space. (allthingsheatingcooling.com)

The three major functions of heating, ventilation, and air conditioning are interrelated, especially with the need to provide thermal comfort and acceptable indoor air quality within reasonable installation, operation, and maintenance costs. (wikipedia.org)
On the one hand, the principle of decoupling heating/cooling from ventilation (HRV/ERV) is gaining ground. (bcit.ca)
The research includes ventilation, crop production on ebb-and-flood floors, floor heating, and more. (agratech.com)
Heating and ventilation air professionals have many years of experience in this field, and have an excellent knowledge of the different technologies used. (interioridea.net)
Supply and exhaust ventilation, heating and air conditioning networks in industrial, commercial and domestic premises. (ventilation-system.com)

This refers to the recognition that rooms are not perfectly sealed and there will always be air flows through these spaces which helps with ventilation and air changes. (gla.ac.uk)
We also know that we need to check CO2 in inadequate spaces to confirm that the restrictions and means to create natural ventilation are also working. (gla.ac.uk)
These ventilation requirements apply to spaces intended for human occupancy within single-family houses and multifamily structures, where the occupants are considered permanent rather than transient. (homeenergy.org)
An enclosed kitchen is "a kitchen whose permanent openings to interior adjacent spaces do not exceed a total of 60 square feet" ( Ventilation and Acceptable Indoor Air Quality in Residential Buildings , p. 3). (homeenergy.org)
The tobacco industry has promoted the installation and use of expensive ventilation systems and equipment, in an attempt to accommodate smokers and non-smokers in the same indoor enclosed spaces. (who.int)

With the development of safe endotracheal tubes with high-volume, low-pressure cuffs, positive-pressure ventilation replaced the iron lung. (medscape.com)
Positive-pressure ventilation means that airway pressure is applied at the patient's airway through an endotracheal or tracheostomy tube. (medscape.com)
Delivers positive airway pressure to stent open the upper airway, allowing for the preoperative delivery of positive pressure ventilation and oxygen for patients with a decreased level of consciousness. (vyaire.com)

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)
A pulmonary ventilation/perfusion scan is actually 2 tests. (medlineplus.gov)
A ventilation and perfusion scan is most often done to detect an acute pulmonary embolus (blood clot in the lungs). (medlineplus.gov)
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)
Other tests may be needed to confirm or rule out the findings of a pulmonary ventilation and perfusion scan. (medlineplus.gov)
Moreover, there is no single functional predictor of progression in CF, but aside from risk factors, such as onset of chronic P. aeruginosa infection and genotype, pulmonary hyperinflation, airway obstruction, and ventilation inhomogeneities are important pathophysiologic processes that should be evaluated concomitantly as determinants of lung progression in CF. (nih.gov)
Highly selective independent segmental ventilation can be considered a suitable option for the pulmonary intersegmental plane identification, which could be universally used for lung segmentectomy. (researchsquare.com)
The independent pulmonary segments were subsequently inflated without ventilation of remaining pulmonary lobe. (researchsquare.com)

There are existing methods to reduce diesel engine emissions (MSHA, 2001)(Head, 2001b), but many operators will decide that a ventilation upgrade is necessary as well. (cdc.gov)
After COVID-19 infection cases begin to decline, industrial ventilation equipment manufacturers must focus on protecting their staff, operations, and supply networks to respond to urgent emergencies and establish new methods of working. (yahoo.com)
By using proper ventilation methods, such as exhaust fans, you can improve your indoor air quality and ensure your home is comfortable and healthy year-round. (tricityappliance.com)

Par conséquent, l'entretien et le nettoyage régulier de vos réseaux de ventilation sont essentiels pour assainir l'air, prévenir les bactéries et les acariens et lutter contre l'humidité. (ase-serem.fr)

With the advance of anaesthesiologic technique, lung ventilation reaches a segmental level. (researchsquare.com)

Protective indoor ventilation practices can reduce the airborne viral concentrations and the overall viral exposure to occupants. (cdc.gov)

If your crawlspace is always overly damp, or if you see mildew on the walls or structure, you may need better ventilation. (dummies.com)
For the purposes of better ventilation? (gov.scot)
I understand that better ventilation is needed but this is ludicrous. (gov.scot)

However, do people know what increasing ventilation means and have they taken steps to properly increase ventilation. (cassbeth.com)
I also want to increase ventilation I will leave out the charcoal filter as suggested here. (hotbincomposting.com)

Our project involves building a new, quieter and more efficient ventilation station. (stm.info)
Secretion clearance is fundamental to limiting airway occlusion and promoting efficient ventilation and gas exchange. (fphcare.com)

Branson RD. Humidification of respired gases during mechanical ventilation: mechanical considerations. (fphcare.com)

Ventilation removes unpleasant smells and excessive moisture, introduces outside air, keeps interior building air circulating, and prevents stagnation of the interior air. (wikipedia.org)
Structural ventilation controls heat levels in the attic, moderates dampness in the crawlspace and basement, and keeps moisture out of uninsulated walls. (dummies.com)
To keep heat and moisture from roasting and rotting your home over time, having adequate ventilation in the attic and the crawlspace (and the basement, if it's unfinished) is important. (dummies.com)
If moisture is left in certain areas of your home without ventilation, mildew and mold can develop and create bigger problems for both your home and health. (tricityappliance.com)
Besides moisture, proper ventilation can remove smoke, cooking odors, and other unwanted air particles from your home. (tricityappliance.com)

Oxylog 3000 provides the flexibility of both comprehensive invasive or non-invasive ventilation support, including the ability to provide automatic back-up support for spontaneously breathing patients in the event of apneas. (rtmagazine.com)
After 8 to 25 min, none of the patients were able to sustain spontaneous breathing and mechanical ventilation was required to resume. (nih.gov)
We conclude that during discontinuation from mechanical ventilation (MV) almost all patients breathe against a high inspiratory load and their inspiratory muscles perform work that may lead to fatigue. (nih.gov)
SAN DIEGO -- Critically ill patients who underwent tracheal intubation had higher oxygen saturations and a lower incidence of severe hypoxemia with bag-mask ventilation, according to results of the PreVent trial. (medpagetoday.com)
For the Preventing Hypoxemia with Manual Ventilation During Endotracheal Intubation trial, Casey and colleagues collected data from seven U.S. ICUs, in which patients were randomized 1:1 to bag-mask ventilation or no ventilation in permuted blocks of 2, 4, and 6, stratified by trial site. (medpagetoday.com)
Meanwhile the control group (202 patients) did not undergo bag-mask ventilation during this interval, unless an attempted laryngoscopy failed, it was needed to treat hypoxemia (oxygen saturation ≤ 90%), or the patient's safety was at risk. (medpagetoday.com)
Patients were excluded if they were pregnant or incarcerated, had urgent need for tracheal intubation, or if a clinician determined ventilation between induction and laryngoscopy was required or contraindicated, the authors reported. (medpagetoday.com)
The iVent201 provides transportable ventilation via its standard 2-hour internal battery to pediatric and adult patients both invasively and noninvasively from the emergency department to the ICU (including MRI). (rtmagazine.com)
For ventilation, all the patients were excluded from tracheal and bronchial variation preoperatively. (researchsquare.com)
Comparison of oxygenation and ventilation in patients undergoing colonoscopy during anesthesia using the SuperNO2VA™ nasal PAP ventilation device vs. routine care: A prospective randomized trial. (vyaire.com)
The aim of this study is to compare ventilation and oxygenation in obese patients under general anesthesia during colonoscopy using continuous positive airway pressure (CPAP) via a novel nasal mask (SuperNO2 VA™ nasal PAP ventilation device) vs. routine care. (vyaire.com)
The Survival Outcomes of Patients Requiring Prolonged Mechanical Ventilation. (bvsalud.org)
Patients who require prolonged mechanical ventilation typically experience poor long-term survival outcomes. (bvsalud.org)
This study aims to determine the factors that affect the five-year survival rate of patients who require prolonged mechanical ventilation , with the goal of improving their survival outcomes. (bvsalud.org)
The current retrospective, single-center study included all patients who required prolonged mechanical ventilation over a period of six years. (bvsalud.org)
The study examined the long-term outcomes of 403 patients who required prolonged mechanical ventilation until December 2018. (bvsalud.org)
For all 403 patients receiving prolonged mechanical ventilation , the one-year and five-year survival rates were 24.3% and 14.6%, respectively. (bvsalud.org)
For the 157 discharged prolonged mechanical ventilation patients , the one-year and five-year survival rates were 50.3% and 32.6%, respectively. (bvsalud.org)
Patients requiring prolonged mechanical ventilation may experience poor survival outcomes. (bvsalud.org)

Implementing multiple building-level mitigation strategies at the same time is consistent with CDC's layered approach and will increase overall effectiveness of ventilation interventions. (cdc.gov)
Because ASHRAE initially used odor control and comfort as the minimum criteria for ventilation effectiveness, many have assumed that the use of CO 2 measurement is supported by the Standard. (automatedbuildings.com)

Classico provides high ventilation and durable construction to meet the needs of professional-style cooking appliances. (yaleappliance.com)

Balanced ventilation is achieved when intake and exhaust allow for same amount of airflow, because the natural forces of air pressure create a push-pull effect around your roof. (certainteed.com)
How does ventilation and airflow work in the NetShelter CX? (apc.com)
A minimum of 200cm 2 of ventilation must be provided at both the top and the bottom of the cabinetry to allow correct airflow. (aeg.ie)

IMSEAR at SEARO: Mechanical ventilation in pediatric practice. (who.int)
Tripathi VN, Misra S. Mechanical ventilation in pediatric practice. (who.int)

This open-space kitchen is so open that it doesn't have a ventilation hood or extractor. (treehugger.com)
The kitchen in this modern cabin is so rustic that it doesn't have a ventilation hood over the stove. (treehugger.com)
Passive houses and other modern, energy-efficient houses are tested to ensure that they don't leak and that ventilation is controlled, but running an exhaust fan really messes up the math, pumping all of that air out, so they try and get by with a recirculating hood that probably doesn't do the job. (treehugger.com)
Often inspiration strikes when you least expect it, and that was certainly the case with the personal ventilation hood. (edu.au)
Professor Monty assembled a team of mechanical engineering specialists who worked through the night to develop a prototype ventilation hood within 48 hours of their first conversation. (edu.au)
A fully mobile device, the personal ventilation hood (now licensed as the McMonty by medihood) is a transparent, plastic cover fitted over a hospital bed and the upper body of a patient. (edu.au)

The Mass Balance equation in the Appendix of ASHRAE Standard 62 is NOT an endorsement of CO 2 measurements as a direct control for ventilation rates. (automatedbuildings.com)
We used our 25 years of air balancing experience and ASHRAE guidelines to develop an air ventilation plan. (csemag.com)
The energy commission first adopted residential mechanical ventilation requirements based on ASHRAE Standard 62.2 with the 2008 California Energy Code and has adopted versions of ASHRAE 62.2 in each subsequent code cycle. (homeenergy.org)
New dwellings and additions to existing dwellings greater than 1,000 square feet must comply with the mechanical ventilation details published in the California Energy Commission Adopted Version of ANSI/ASHRAE Standard 62.2-2016, Ventilation and Acceptable Indoor Air Quality in Residential Buildings, and in 2019 Building Energy Efficiency Standards for Residential and Nonresidential Buildings . (homeenergy.org)
I will refer to the ventilation requirements of these two documents as ASHRAE 62.2-2016CA. (homeenergy.org)

Randomized controlled trials are needed to identify benefits of HFOV versus conventional modes of mechanical ventilation. (unboundmedicine.com)
Pressure-support versus proportional-assist ventilation. (medtronic.com)

In the crawlspace, cross-ventilation is used. (dummies.com)

Worse still, a lack of ventilation may lead to premature failures and of course appliance faults due to incorrect installation, including a lack of or insufficient ventilation, may not be covered by a warranty. (aeg.ie)

Included more information on up-front, maintenance, and energy cost considerations for ventilation strategies. (cdc.gov)

HFOV was effective at improving both oxygenation , with a median (interquartile range (IQR)) decrease in oxygenation index of 6.34 (5.0 - 9.5), and ventilation with a the median decrease in PaCO2 of 67.6 (46.2 - 105.7) mmHg after 24 hours. (bvsalud.org)

In an accompanying editorial , Patricia Kritek, MD, and Andrew Luks, MD, both of the University of Washington in Seattle, said the trial results "may not settle the question of the safety of bag-mask ventilation during rapid-sequence intubation," but they do provide "reassurance" that manual ventilation will not likely lead to clinically significant harm. (medpagetoday.com)
The sampling will continue to give reassurance that ventilation is adequate. (gla.ac.uk)

Hybrid ventilation (HV), as a combination of automated natural ventilation (NV) and balanced mechanical ventilation (MV), provides opportunities to use the advantages of both ventilation systems during the seasons in order to reduce energy demand and at the same time obtain comfortable indoor climate. (aivc.org)
If not, some restriction in occupancy to use the space or further mitigations using opening windows or doors to create natural ventilation to the end users will be required. (gla.ac.uk)
At one time, it was possible to achieve natural ventilation in our homes by simply opening a window. (lennox.com)
Our simple, safe, and smart design provides more natural ventilation that may help improve patient comfort. (medtronic.com)
Currently, Short's colleague, Mike Brugger, is in southernSpain, working with engineers there to use the CFD models on their unique structural designs to predict natural ventilation rates. (agratech.com)
Like OSU, researchers at Rutgersand collaborators have developed a computer simulation model for natural ventilation in open-roof greenhouses to help predict ventilation performance. (agratech.com)

Local authorities are fully aware that they should undertake any remedial work in line with Scottish Government guidance on ventilation and expert input. (gov.scot)

Without adequate ventilation, air quality is stagnant and toxins circulate throughout the home. (interioridea.net)

Survival analysis was used to determine the association between HIV infection/exposure with mortality, and linear regression was used to examine the association with length of stay and duration of mechanical ventilation. (who.int)
HIV infection was associated with prolonged length of mechanical ventilation and ICU stay but not increased mortality. (who.int)

Get answers to Frequently Asked Questions below about ventilation and safe building practices during and after the COVID-19 pandemic. (cdc.gov)
Ventilation can make schools and offices safe from covid-19 - but how? (newscientist.com)
The outbreak of the COVID-19 pandemic had a negative impact on the growth of the global industrial ventilation equipment market, owing to implementation of global lockdown which resulted to temporary closure of production of many products in the industrial ventilation equipment market. (yahoo.com)
We are conducting this COVID-19 ventilation survey as part of our research efforts. (cassbeth.com)
COVID-19: We are committed to creating more than safe air with our ventilation products. (mymaxxair.com)

These configurations offer flexibility as it allows the SuperNO 2 VA™ nasal PAP ventilation device to be used with either an anesthesia machine or with only an oxygen flow meter. (vyaire.com)
The authors hypothesized that nasal mask ventilation may be more effective than combined oral-nasal mask ventilation during induction of general anesthesia. (vyaire.com)
The authors suggest that nasal mask ventilation, rather than full facemask ventilation, be considered during induction of anesthesia. (vyaire.com)

Ventilation stations built for the original métro network extract around 160,000 cubic feet of air per minute, while the new ventilation systems extract around 240,000 cubic feet per minute. (stm.info)

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)
The mask used during the ventilation scan may make you feel nervous about being in a small space (claustrophobia). (medlineplus.gov)
Operator-reported aspiration during intubation was more likely in the control arm than in the bag-mask ventilation group (4% vs 2.5%, P =0.41), they reported at the Society of Critical Care Medicine (SCCM) annual meeting and simultaneously in the New England Journal of Medicine . (medpagetoday.com)

Not only can proper attic ventilation keep your energy costs down, it will help your roof last as long as possible. (certainteed.com)
Proper ventilation necessitates that fresh air is able to find its way in the attic space, while allowing stale air to get out. (certainteed.com)
With proper ventilation, however, this warm air find its way up and out of the home rather than staying trapped. (certainteed.com)
Proper interior ventilation is vital to your family's health and comfort. (dummies.com)
Why is ventilation important for proper indoor air quality? (lennox.com)

It will inform approach on ventilation as a key component of delivering both new buildings and deep retrofit low energy buildings. (seai.ie)
Hybrid ventilation - the ventilation concept in the future school buildings? (aivc.org)
What about the ventilation levels in corridors and changes in levels throughout buildings? (gla.ac.uk)
Growth in population in developing economies such as China, India, and the U.S., increase in industrial constructions, rise in concern regarding air quality such as low indoor air quality, surge in construction of green buildings, and strengthened government regulations regarding carbon emission drive the global industrial ventilation equipment market. (yahoo.com)
Ventilation and Acceptable Indoor Air Quality in Residential Buildings", p. 2). (homeenergy.org)

Improved ventilation, including filtration, is just one of the many safety measures that have been identified to help reduce the spread of the virus. (alcdsb.on.ca)
Please note that this Ministry funding includes spending from dedicated ventilation programs (including stand-alone HEPA filtration unit funding), federal-provincial funding, provincial renewal funding and supplemental funding from other board sources. (alcdsb.on.ca)

Simultaneously recorded videos in the upper 2 frames show the first scenario, in which the main ventilation exhaust was directed away from the operating field. (cdc.gov)

Anatomy18

Organisms5

Diseases53

Chemicals and Drugs24

Analytical, Diagnostic and Therapeutic Techniques and Equipment106

Psychiatry and Psychology3

Phenomena and Processes51

Disciplines and Occupations2

Anthropology, Education, Sociology and Social Phenomena1

Technology, Industry, Agriculture5

Information Science3

Named Groups3

Health Care31

Modeling breathing-zone concentrations of airborne contaminants generated during compressed air spray painting. (1/417)

Mathematical models for predicting indoor air quality from smoking activity. (2/417)

Effect of temperature on lung function and symptoms in chronic obstructive pulmonary disease. (3/417)

A 15-week experimental exposure of pigs to airborne dust with added endotoxin in a continuous flow exposure chamber. (4/417)

Buildings operations and ETS exposure. (5/417)

Effects of aqueous extracts of PM(10) filters from the Utah valley on human airway epithelial cells. (6/417)

Airborne infection in a fully air-conditioned hospital. II. Transport of gaseous and airborne particulate material along ventilated passageways. (7/417)

Office equipment and supplies: a modern occupational health concern? (8/417)

Ventilation

Respiration, Artificial

Pulmonary Ventilation

High-Frequency Ventilation

Intermittent Positive-Pressure Ventilation

Tidal Volume

Positive-Pressure Respiration

High-Frequency Jet Ventilation

Noninvasive Ventilation

Ventilator Weaning

Respiration

Respiratory Mechanics

Ventilators, Mechanical

Pulmonary Gas Exchange

Carbon Dioxide

Ventilation-Perfusion Ratio

Intubation, Intratracheal

Hypercapnia

Respiratory Distress Syndrome, Adult

Ventilator-Induced Lung Injury

Oxygen

Work of Breathing

Blood Gas Analysis

Partial Pressure

Lung

Lung Compliance

Tracheostomy

One-Lung Ventilation

Air Pressure

Helium

Intensive Care Units

Laryngeal Masks

Ventilators, Negative-Pressure

Respiratory Distress Syndrome, Newborn

Masks

Maximal Voluntary Ventilation

Respiratory Function Tests

Lung Volume Measurements

Intensive Care

Respiratory Dead Space

Anoxia

Tracheotomy

Airway Resistance

Respiratory Rate

Apnea

Lung Injury

Hypoventilation

Diaphragm

Prone Position

Intermittent Positive-Pressure Breathing

Oxygen Inhalation Therapy

Respiratory Physiological Phenomena

Krypton Radioisotopes

Acute Lung Injury

Pulmonary Circulation

Respiratory Muscles

Hyperventilation

Krypton

Pulmonary Atelectasis

Barotrauma

Airway Obstruction

Critical Illness

Airway Extubation

Functional Residual Capacity

Lung Diseases, Obstructive

Chemoreceptor Cells

Infant, Newborn

Inhalation

Anesthesia, General

Time Factors

Air Conditioning

Oxygen Consumption

Pulmonary Edema

Lung Diseases

Interactive Ventilatory Support

Critical Care

Neuromuscular Diseases

Prospective Studies

Air Movements

Middle Ear Ventilation