Maximal Expiratory Flow-Volume Curves: Curves depicting MAXIMAL EXPIRATORY FLOW RATE, in liters/second, versus lung inflation, in liters or percentage of lung capacity, during a FORCED VITAL CAPACITY determination. Common abbreviation is MEFV.Maximal Expiratory Flow Rate: The airflow rate measured during the first liter expired after the first 200 ml have been exhausted during a FORCED VITAL CAPACITY determination. Common abbreviations are MEFR, FEF 200-1200, and FEF 0.2-1.2.Lung Volume Measurements: Measurement of the amount of air that the lungs may contain at various points in the respiratory cycle.Forced Expiratory Flow Rates: The rate of airflow measured during a FORCED VITAL CAPACITY determination.Peak Expiratory Flow Rate: Measurement of the maximum rate of airflow attained during a FORCED VITAL CAPACITY determination. Common abbreviations are PEFR and PFR.Respiratory Function Tests: Measurement of the various processes involved in the act of respiration: inspiration, expiration, oxygen and carbon dioxide exchange, lung volume and compliance, etc.Residual Volume: The volume of air remaining in the LUNGS at the end of a maximal expiration. Common abbreviation is RV.Vital Capacity: The volume of air that is exhaled by a maximal expiration following a maximal inspiration.Forced Expiratory Volume: 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.Airway Obstruction: Any hindrance to the passage of air into and out of the lungs.Total Lung Capacity: 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.Lung: Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.Airway Resistance: 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.Spirometry: Measurement of volume of air inhaled or exhaled by the lung.Pulmonary Ventilation: The total volume of gas inspired or expired per unit of time, usually measured in liters per minute.United States Occupational Safety and Health Administration: An office in the Department of Labor responsible for developing and establishing occupational safety and health standards.National Institute for Occupational Safety and Health (U.S.): An institute of the CENTERS FOR DISEASE CONTROL AND PREVENTION which is responsible for assuring safe and healthful working conditions and for developing standards of safety and health. Research activities are carried out pertinent to these goals.United States Department of Veterans Affairs: A cabinet department in the Executive Branch of the United States Government concerned with overall planning, promoting, and administering programs pertaining to VETERANS. It was established March 15, 1989 as a Cabinet-level position.Veterans Health: The concept covering the physical and mental conditions of VETERANS.Hospitals, Veterans: Hospitals providing medical care to veterans of wars.Occupational Health: The promotion and maintenance of physical and mental health in the work environment.Veterans: Former members of the armed services.Inflammation: A pathological process characterized by injury or destruction of tissues caused by a variety of cytologic and chemical reactions. It is usually manifested by typical signs of pain, heat, redness, swelling, and loss of function.Muscle, Smooth: Unstriated and unstriped muscle, one of the muscles of the internal organs, blood vessels, hair follicles, etc. Contractile elements are elongated, usually spindle-shaped cells with centrally located nuclei. Smooth muscle fibers are bound together into sheets or bundles by reticular fibers and frequently elastic nets are also abundant. (From Stedman, 25th ed)Airway Remodeling: The structural changes in the number, mass, size and/or composition of the airway tissues.Muscle, Smooth, Vascular: The nonstriated involuntary muscle tissue of blood vessels.Body Height: The distance from the sole to the crown of the head with body standing on a flat surface and fully extended.Thorax: 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)Myotonic Dystrophy: Neuromuscular disorder characterized by PROGRESSIVE MUSCULAR ATROPHY; MYOTONIA, and various multisystem atrophies. Mild INTELLECTUAL DISABILITY may also occur. Abnormal TRINUCLEOTIDE REPEAT EXPANSION in the 3' UNTRANSLATED REGIONS of DMPK PROTEIN gene is associated with Myotonic Dystrophy 1. DNA REPEAT EXPANSION of zinc finger protein-9 gene intron is associated with Myotonic Dystrophy 2.Muscle Weakness: A vague complaint of debility, fatigue, or exhaustion attributable to weakness of various muscles. The weakness can be characterized as subacute or chronic, often progressive, and is a manifestation of many muscle and neuromuscular diseases. (From Wyngaarden et al., Cecil Textbook of Medicine, 19th ed, p2251)Corneal Dystrophies, Hereditary: Bilateral hereditary disorders of the cornea, usually autosomal dominant, which may be present at birth but more frequently develop during adolescence and progress slowly throughout life. Central macular dystrophy is transmitted as an autosomal recessive defect.Muscular Dystrophies: A heterogeneous group of inherited MYOPATHIES, characterized by wasting and weakness of the SKELETAL MUSCLE. They are categorized by the sites of MUSCLE WEAKNESS; AGE OF ONSET; and INHERITANCE PATTERNS.Myotonic Disorders: Diseases characterized by MYOTONIA, which may be inherited or acquired. Myotonia may be restricted to certain muscles (e.g., intrinsic hand muscles) or occur as a generalized condition.Muscular Dystrophy, Duchenne: An X-linked recessive muscle disease caused by an inability to synthesize DYSTROPHIN, which is involved with maintaining the integrity of the sarcolemma. Muscle fibers undergo a process that features degeneration and regeneration. Clinical manifestations include proximal weakness in the first few years of life, pseudohypertrophy, cardiomyopathy (see MYOCARDIAL DISEASES), and an increased incidence of impaired mentation. Becker muscular dystrophy is a closely related condition featuring a later onset of disease (usually adolescence) and a slowly progressive course. (Adams et al., Principles of Neurology, 6th ed, p1415)Bronchitis: Inflammation of the large airways in the lung including any part of the BRONCHI, from the PRIMARY BRONCHI to the TERTIARY BRONCHI.Pulmonary Disease, Chronic Obstructive: A disease of chronic diffuse irreversible airflow obstruction. Subcategories of COPD include CHRONIC BRONCHITIS and PULMONARY EMPHYSEMA.Lung Diseases, Obstructive: Any disorder marked by obstruction of conducting airways of the lung. AIRWAY OBSTRUCTION may be acute, chronic, intermittent, or persistent.Pulmonary Emphysema: Enlargement of air spaces distal to the TERMINAL BRONCHIOLES where gas-exchange normally takes place. This is usually due to destruction of the alveolar wall. Pulmonary emphysema can be classified by the location and distribution of the lesions.Sleep Apnea Syndromes: Disorders characterized by multiple cessations of respirations during sleep that induce partial arousals and interfere with the maintenance of sleep. Sleep apnea syndromes are divided into central (see SLEEP APNEA, CENTRAL), obstructive (see SLEEP APNEA, OBSTRUCTIVE), and mixed central-obstructive types.Polysomnography: Simultaneous and continuous monitoring of several parameters during sleep to study normal and abnormal sleep. The study includes monitoring of brain waves, to assess sleep stages, and other physiological variables such as breathing, eye movements, and blood oxygen levels which exhibit a disrupted pattern with sleep disturbances.Sleep Apnea, Obstructive: A disorder characterized by recurrent apneas during sleep despite persistent respiratory efforts. It is due to upper airway obstruction. The respiratory pauses may induce HYPERCAPNIA or HYPOXIA. Cardiac arrhythmias and elevation of systemic and pulmonary arterial pressures may occur. Frequent partial arousals occur throughout sleep, resulting in relative SLEEP DEPRIVATION and daytime tiredness. Associated conditions include OBESITY; ACROMEGALY; MYXEDEMA; micrognathia; MYOTONIC DYSTROPHY; adenotonsilar dystrophy; and NEUROMUSCULAR DISEASES. (From Adams et al., Principles of Neurology, 6th ed, p395)Snoring: Rough, noisy breathing during sleep, due to vibration of the uvula and soft palate.Sleep: A readily reversible suspension of sensorimotor interaction with the environment, usually associated with recumbency and immobility.Breath Tests: Any tests done on exhaled air.Monitoring, Ambulatory: The use of electronic equipment to observe or record physiologic processes while the patient undergoes normal daily activities.Infant Formula: Liquid formulations for the nutrition of infants that can substitute for BREAST MILK.Infant Food: Food processed and manufactured for the nutritional health of children in their first year of life.Dietary Proteins: Proteins obtained from foods. They are the main source of the ESSENTIAL AMINO ACIDS.Infant, Newborn: An infant during the first month after birth.Caseins: A mixture of related phosphoproteins occurring in milk and cheese. The group is characterized as one of the most nutritive milk proteins, containing all of the common amino acids and rich in the essential ones.Infant Nutritional Physiological Phenomena: Nutritional physiology of children from birth to 2 years of age.Milk, Human
MMEF or MEF stands for maximal (mid-)expiratory flow and is the peak of expiratory flow as taken from the flow-volume curve and ... FVC is the most basic maneuver in spirometry tests. Forced expiratory volume in 1 second (FEV1). FEV1 is the volume of ... Forced expiratory flow (FEF). Forced expiratory flow (FEF) is the flow (or speed) of air coming out of the lung during ... Expiratory reserve volume: the maximal volume of air that can be exhaled from the end-expiratory position. ...
List of MeSH codes (E01)
... maximal expiratory flow rate MeSH E01.370.386.700.660.225.505 --- maximal expiratory flow-volume curves MeSH E01.370.386.700. ... intradermal tests MeSH E01.370.750.300.400 --- kveim test MeSH E01.370.750.300.750 --- skin test end-point titration MeSH ... peak expiratory flow rate MeSH E01.370.386.700.660.230 --- forced expiratory volume MeSH E01.370.386.700.660.500 --- maximal ... expiratory reserve volume MeSH E01.370.386.700.485.750.275.650 --- residual volume MeSH E01.370.386.700.485.750.900 --- vital ...
Peak expiratory flow
Knudson, RJ (1983). "Changes in the normal maximal expiratory flow-volume curve with growth and aging". Am Rev Respir Dis. 127 ... Due to the wide range of 'normal' values and the high degree of variability, peak flow is not the recommended test to identify ... The peak expiratory flow (PEF), also called peak expiratory flow rate (PEFR) is a person's maximum speed of expiration, as ... It is important to use the same peak flow meter every time. To interpret the significance of peak expiratory flow measurements ...
The highest forced expiratory flow measured with a peak flow meter. MVV. Maximal voluntary ventilation: volume of air expired ... respiratory minute volume. FEV1/FVC ratio. Lung function tests. spirometry. body plethysmography. peak flow meter. nitrogen ... Forced expiratory flow related to some portion of the FVC curve; modifiers refer to amount of FVC already exhaled. ... Expiratory reserve volume: the maximal volume of air that can be exhaled from the end-expiratory position. ...
... a volume-time curve, showing volume (litres) along the Y-axis and time (seconds) along the X-axis a flow-volume loop, which ... forced expiratory flow 25-75% (FEF 25-75) and maximal voluntary ventilation (MVV), also known as Maximum breathing capacity. ... Sometimes, the test will be preceded by a period of quiet breathing in and out from the sensor (tidal volume), or the rapid ... FVC is the most basic maneuver in spirometry tests. FEV1 is the volume of air that can forcibly be blown out in one second, ...
Standards Improvement Project-Phase IV; Proposed Rule | Occupational Safety and Health Administration
Knudson, R. J., Slatin, R. C., Lebowitz, M. D. and Burrows, B. (1976). The maximal expiratory flow-volume curve. Normal ... time curves or tracings during testing. The flow-volume curve emphasizes early expiration and allows the technician to detect ... In contrast, most current flow-type and volume-type spirometers use computer-generated displays of expiration curves projected ... Appendix D(I)(g) also requires the spirometer to display flow versus volume or volume versus time tracings. The proposed ...
Changes in the normal maximal expiratory flow-volume curve with growth and aging
Other flow-volume measurements were derived from the single test with the best sum FEV, plus FVC. These data were used to ... Changes in the normal maximal expiratory flow-volume curve with growth and aging Am Rev Respir Dis. 1983 Jun;127(6):725-34. doi ... For forced vital capacity (FVC) and forced expiratory volume in one second (FEV1), the single best value for each subject was ... For each subject, the first satisfactory set of flow-volume data obtained during the first 3 consecutive surveys was selected ...
Spirometry tests: Continuing professional development - Personnel Today
18 Knudson RJ, Slatin RC, Lebowitz MD, Burrows B. The maximal expiratory flow volume curve. Normal standards, variability, and ... Exactly the same information is available from the flow volume curve. But the FEV1 and expiratory time cannot be directly ... Expressing expiratory airflow. The expiratory volume/time curve gives the simplest and most informative picture of the ... Tests which last for a duration of more than six seconds and have a plateau on the volume/time curve at the end of the blow ...
Effect of a nasal dilatator on nasal patency during normal and forced nasal breathing. - PubMed - NCBI
Nasal resistance was measured with a whole body plethysmograph; maximal expiratory and inspiratory flow-volume curves were ... paired t-test) than values obtained without the nasal dilatator; mean improvement was 0.26 L (sd = 0.36). No significant ... by measuring nasal airway resistance during normal breathing and nasal forced expiratory and inspiratory flows and volumes with ... improvement in peak inspiratory flow (PIF) was found, as was the case for the other flows and volumes. It is concluded that the ...
Pulmonary Function Tests Flashcards by Lindsey Herrera | Brainscape
Study Pulmonary Function Tests flashcards from Lindsey Herrera ... In a flow volume loop, a ______will have a flattened curve in ... On a flow volume loop curve, ______ will show limited inspiration with normal expiratory flow. ... In a flow volume loop in the case of ______, the maximal airflow is reduced because the total volume of gas in the lung is ... In a flow volume loop in the case of restrictive diseases, the maximal airflow is _______ because the total volume of gas in ...
Johnstown Pulmonary Services, Top-Rated Johnstown Pulmonologists, Expert Respiratory Care Johnstown Pennsylvania
... flow rates against lung volumes; the link between flow rates to lung volume produces a typical Flow-volume curve. The Flow- ... Flow-Volume Loop: Common practice of charting expiratory (breathing out) ... Lung Volume. Pulmonary Function Lab. Conemaugh Memorial Medical Centers Pulmonary Function Lab provides comprehensive testing ... Maximal Respiratory Pressures: Measures the force of air coming from the lungs with a device in the mouth. Assesses and ...
NIOSHTIC-2 Publications Search - 00020485 - Some factors affecting the relationship of maximal expiratory flow to lung volume...
The flow-volume (FV) loop was introduced by Hyatt and associates in 1958. Its potential as a means of assessing lung function ... The FV curve was found to be reasonably effective in distinguishing normal subjects from those with lung disease, but did not ... Respiratory-function-tests; Airway-resistance; Biomedical-measurement; Asthma; Respiratory-system-disorders. CODEN ... Some factors affecting the relationship of maximal expiratory flow to lung volume in health and disease.. ...
Spirometric reference values from a Mediterranean population. - PubMed - NCBI
Maximal expiratory flow-volume (MEFV) curves were measured in 1044 healthy nonsmoking volunteers living in the Barcelona area, ... as part of a larger interhospital project to obtain reference values of pulmonary function tests. Forced vital capacity (FVC), ... forced maximal mid-expiratory flow (FEF25-75%), peak expiratory flow rate (PEF) and maximal expiratory flow at 50 and 75% of ... one-second forced expiratory volume (FEV1), FEV1/FVC, %, ... Maximal Expiratory Flow Rate. *Maximal Midexpiratory Flow Rate ...
DEF rate | definition of DEF rate by Medical dictionary
maximal expiratory flow rate (MEFR) maximal expiratory flow.. maximal midexpiratory flow rate (MMFR) maximal midexpiratory flow ... the slope of the line connecting the points 200 ml and 1200 ml on the forced expiratory volume curve. See also pulmonary ... A nonspecific laboratory test used as a marker of inflammation. In this test the speed at which erythrocytes settle out of ... forced expiratory flow rate forced expiratory flow.. general fertility rate the most widely used measure of fertility; the ...
NIOSHTIC-2 Search Results - Full View
... subjects with abnormal maximal expiratory flow volume curves was significantly greater than those with normal air flow curves, ... Pulmonary function testing that included simple spirometry and expiratory flow measurements was performed. The chest X-rays ... Twenty four subjects with normal spirometry had abnormal air flow curves. Pulmonary function was improved in 27 of 44 subjects ... The prevalence of radiographic small opacities was not correlated with the pulmonary function test data or the pulmonary ...
NIOSHTIC-2 Search Results - Full View
Predictions of maximal expiratory flow volume curves and static pressure volume curves for excised dog or normal human lungs at ... The testing and validation of a mathematical model of the mechanical properties of the lungs used in studying the maximal ... Predictions of maximal expiratory flow volume curves and other lung mechanics data for man based on breathing mixtures of ... An Analysis of Maximal Expiratory Flow-Volume Curves Based on an Analytical Model of Lung Mechanics. ...
Performing maximal expiratory flow volume curve experiments in excised human lungs, Berend et al. 7 also showed that flow at ... When physiological measurements reflecting small airway abnormalities such as the nitrogen-washout test, volume of isoflow, ... They also found that the closing volume and mid-expiratory flow correlated significantly with a measure of airway luminal size ... change in maximal expiratory flow at the 50% vital capacity between air and helium (ΔVmax50), and other functional parameters ...
Cystic Fibrosis - ONA
Visit us often for drug therapy testing results, patient care information and more. Download our FREE app today. ... Maximal expiratory flow-volume curves are sometimes helpful in distinguishing between contributions to airway obstruction by CF ... A sweat test using the Quantitative Pilocarpine Iontophoreseis Sweat Test Method is the first test to be performed in the ... In infants, tests are limited to those that do not depend on the patients cooperation. One method, the raised volume rapid ...
Maximal expiratory flow-volume curves are sometimes helpful in distinguishing between contributions to airway obstruction by CF ... A sweat test using the Quantitative Pilocarpine Iontophoreseis Sweat Test Method is the first test to be performed in the ... In infants, tests are limited to those that do not depend on the patients cooperation. One method, the raised volume rapid ... Pulmonary function testing (PFTs) includes spirometry, measurement of lung volumes, and assessment of gas exchange. Age- ...
Maternal intake of sugar during pregnancy and childhood respiratory and atopic outcomes | European Respiratory Society
The best of three reproducible flow-volume curves was used to measure forced expiratory volume in 1 s (FEV1), forced vital ... and maximal mid-expiratory flow (forced expiratory flow at 25-75% of FVC (FEF25-75)), which were further transformed to age-, ... as many children did not fulfil forced expiratory time ,6 s end-of-test criteria, a minimal volume change over the final 1 s ... criteria for standardisation and reproducibility of flow-volume measurement , with the exception of ATS recommendations for ...
Effects of inhaled salbutamol in exercising non-asthmatic athletes | Thorax
... to plot maximal expiratory flow-volume curves which were used to measure forced vital capacity (FVC) and forced expiratory ... Psychomotor performance was assessed using four tests: the choice reaction time, the simple reaction test, the tapping test, ... Mean (SD) forced expiratory volume in 1 second (FEV1) during the three sessions before treatment, 10 minutes after treatment, ... During the constant load exercise tests the subjects exercised at 85% of their maximal aerobic power determined during the ...
Feasibility of measuring lung function in preschool children | Thorax
Changes in normal maximal expiratory flow-volume curve with growth and aging. Am Rev Respir Dis1983;127:725-34. ... and sex affect the acceptability of spirometric tests. We focused on forced expiratory flow-volume curves which would be useful ... At least three technically acceptable attempts of maximal forced expiratory flow-volume curves were recorded. However, children ... 82.6% (214/259) were successful in generating technically acceptable flow-volume curves during the first testing session, 95% ...
JMIR - Evaluating a Web-Based Coaching Program Using Electronic Health Records for Patients With Chronic Obstructive Pulmonary...
... deep breath to generate the maximal expiratory flow volume (MEFV) curve; this was repeated three times . ... Six-Minute Walking Test. The 6-minute walking test (6MWT) has demonstrated validity and reliability to assess changes in ... midexpiratory flow; MMEF: maximal midexpiratory flow; PEF: peak expiratory flow. ... a FEV1%: The percent of forced expiratory volume in 1 second in prediction; FEV1/FVC: forced expiratory volume in 1 second / ...
Respiratory responses to one year of daily use of a cosmetic hair spray | Springer for Research & Development
Black, L. F., Offord, K., Hyatt, R. E.: Variability in the maximal expiratory flow volume curve in asymptomatic smokers and in ... Buist, A. S., Ross, B. B.: Predicted values for closing volumes using a modified single breath nitrogen test. Am. Rev. Respir. ... Cochrane, G. M., Prieto, F., Clark, T. J. H.: Intrasubject variability of maximal expiratory flow volume curve. Thorax32, 171- ... Knudson, R. J., Slatin, R. C., Lebowitz, M., Burrows, B.: The maximal expiratory flow-volume curve. Normal standards, ...
Postural Spirometry Changes in Ambulatory Myotonic Dystrophy Patients - Full Text View - ClinicalTrials.gov
The flow/volume curve and lung volumes were respectively assessed by an open-circuit spirometry and plethysmography. ... Maximal Inspiratory Pressure (MIP) and Maximal Expiratory Pressure (MEP) were both measured in the seated position using a ... Pulmonary Function Testing, both from the University Hospital of Nancy. Pulmonary tests were ordered for clinical indications ... All pulmonary function tests met or exceeds applicable standards of the European Respiratory Society / American Thoracic ...
Evaluation of Spirometry for Medical Clearance in Occupations Requiring Respirator Usage
... to qualify for respirator use based on questionnaire alone but failed respirator clearance after pulmonary function testing, it ... Knudson, R.J., Lebowitz, M.D., Holberg, C.J. and Burrows, B. (1983) Changes in the Normal Maximal Expiratory Flow-Volume Curve ... Raven, P.B., Davis, T.O., Safer, C.L. and Linnebur, A.C. (1977) Maximal Stress Test Performance While Wearing a Self-Contained ... Knudson, R.J., Slatin, R.C., Lebowitz, M.D. and Burrows, B. (1976) The Maximal Expiratory Flow-Volume Curve. Normal standards, ...
Ailments causing Bronchial obstruction- Especially, Chronic Obstructive Pulmonary Diseases (COPD) | HubPages
... and a low maximum mid-expiratory flow. Slowing of forced expiration is also evident on flow-volume curves. The vital capacity ( ... Spirometric testing reveals characteristic obstruction to expiratory air flow with slowing of forced expiration as manifested ... This degree of abnormality should persist despite prolonged, maximal therapy before a diagnosis of COPD is considered confirmed ... The most common test used in helping to diagnose the condition is called spirometry. This test estimates lung volumes by ...
Evaluation of functional capacity, body composicion and pulmonary function after bariatric surgery
Knudson, R.J., Lebowitz, M.D., Holberg, C.J. and Burrows, B. (1983) Changes in the normal maximal expiratory flow-volume curve ... Evalutation Tests. Six Minute Walk Test (6MWT)-This test, with the aim of evaluating functional capacity, was performed by a ... Forced expiratory volume in one second; VC: Vital capacity; IC: Inspiratory capacity; ERV: Expiratory reserve volume; IRV: ... Six minute walk test (6MWT)-This test, with the object of evaluating physical capacity, was explored by the absolute values of ...
Most recent papers with the keyword Breath test | Read by QxMD
OBJECTIVE: To evaluate tidal breathing (TB) flow-volume and flow-time curves for identification of expiratory airway ... Parameters derived from TB curves were compared to maximal expiratory flow at functional residual capacity ([Formula: see text] ... Home sleep apnea testing (HSAT) using portable monitors (PMs) is an alternative testing method offering better comfort and ... Use of tidal breathing curves for evaluating expiratory airway obstruction in infants. ...
Most recent papers with the keyword Infant formula | Read by QxMD
OBJECTIVE: To evaluate tidal breathing (TB) flow-volume and flow-time curves for identification of expiratory airway ... Parameters derived from TB curves were compared to maximal expiratory flow at functional residual capacity ([Formula: see text] ... Objective: To test the hypothesis that weaning to an extensively hydrolyzed formula decreases the cumulative incidence of type ... Use of tidal breathing curves for evaluating expiratory airway obstruction in infants. ...
Pulmonary | Harrisburg Friends Meeting
... forced expiratory flow, midexpiratory phase; forced expiratory time; flow/volume curve; and date and time of the test. It can ... Its has a flow range of ± 16 L/s and a maximal volume of 10 L, a flow accuracy of 5% or 200 mL/s, and a volume accuracy of 3% ... The test curve with the highest sum of the FVC and FEV1 was considered the best curve, and the largest FVC and FEV1 ... the subjected started exhalation with maximal effort and continued until end-of-test criteria were met. Forced expiratory ...
ATS WORKSHOP ON LUNG VOLUME MEASUREMENTS OFFICIAL STATEMENT OF THE EUROPEAN RESPIRATORY SOCIETY - PDF
Pulmonary Function: Tests. Spirometry and Maximal Expiratory and Inspiratory Flow Volume Curves Pulmonary Function Tests PFT ... Flow Volume Loops PULMONARY FUNCTION TESTS A Workshop on Simple Spirometry & Flow Volume Loops YOU SHOULD READ THE FOLLOWING ... Ann Hum Biol 1979; 6: Solymar L, Aronsson P-H, Bake B, Bjure J. Nitrogen single-breath test, flow-volume curves and spirometry ... Am Rev Respir Dis 1980; 122: Wall MA, Misley MC, Dickerson D. Partial expiratory flow-volume curves in young children. Am Rev ...
SSA - POMS: DI 34123.005 - Respiratory Listings from 10/07/93 to 05/23/02 - 02/27/2013
The testing device must accurately measure both time and volume, the latter to within 1 percent of a 3 L calibrating volume. If ... The spirogram is satisfactory for measurement of the FVC if maximal expiratory effort continues for at least 6 seconds, or if ... The volume calibrations should agree to within 1 percent of a 3 L calibrating volume. The proximity of the flow sensor to the ... there is a plateau in the volume-time curve with no detectable change in expired volume (VE) during the last 2 seconds of ...
MEFVPeakTidalResidualVoluntary ventilationManeuversVentilationPressuresExhalationManeuverAirflowAlveolarVariabilityMeasurementForced vital caPlethysmographyPulmonary FunctioInspirationFunctionalObstructiveAsthmaLung Volumes and CapacitiesEquationsMeasuresRestrictiveAcutePressure-volume curveAirway closureVentilatoryBronchialFunction TestsVitalLiters per secondBaselineDyspneaViscoelasticityMethodsChestDiagnosisOxygen uptakeIndicationsAirwaysRespiratory SystemAbnormalPeripheral airway
- Maximal expiratory flow-volume (MEFV) curves were measured in 1044 healthy nonsmoking volunteers living in the Barcelona area, as part of a larger interhospital project to obtain reference values of pulmonary function tests. (nih.gov)
- Lung and forced expiratory volumes, derivatives of MEFV curves, closing volume information and the phase III slope, determined every 3 months, furnished 20 serial indices. (springer.com)
- Responses were assessed by measuring partial and complete forced expiratory flow-volume curves (PEFV and MEFV, respectively). (nih.gov)
- A modification of the maneuver for the maximal expiratory flow volume (MEFV) curve was described recently to improve the rate of achieving the acceptability criteria of the American Thoracic Society. (termsreign.tk)
- On finding a potential compound for the treatment of respiratory disease, researchers examined the effect of invigorating Kidney (Viscum coloratum 15g, Psoralea corylifolia 15g, Eucommia ulmoides 15g, Lycium chinense 9g, Tussilago farfara 15g, Artemisia capillaris 9g, and Pogostemon cablin 9g as daily dosage) on asthma by measuring maximal expiratory flow-volume curve (MEFV) in the convalescent stage. (ladometer.com)
- According to the tested analysis after treament of the decoction only exerted effects on different parameters associated with the improvement of MEFV in some extent, but also reversed the airway obstruction of asthmatics in the convalescent stage. (ladometer.com)
- No significant improvement in peak inspiratory flow (PIF) was found, as was the case for the other flows and volumes. (nih.gov)
- Likewise, inspiratory muscle training improved quality of life scores, ventilatory oscillations during exercise, peak oxygen uptake, circulatory power, slope of oxygen uptake in the recovery period, and the distance in the six-minute walk test. (onlinejacc.org)
- The peak expiratory flow (PEF) is the peak flow occurring during exhalation. (merckmanuals.com)
- After the starting point the curve rapidly mounts to a peak (the peak expiratory flow). (wikipedia.org)
- Magnesium treatment led to significant increases in the maximal load reached (+8 w) and the respiratory exchange ratio (0.06) at peak exercise. (scielo.br)
- The IV administration of Mg during episodes of acute exacerbation of COPD in patients treated with albuterol leads to improvements in the peak flow (12). (scielo.br)
- These parameters are Forced Vital Capacity (FVC), Forced Expiratory Volume at timed intervals of 0.5, 1.0, 2.0, and 3.0 seconds (FEV 1/2-3 ), Forced Expiratory Flow 25-75% (FEF 25-45 %), Forced Inspiratory Flow 25-75% (FIF 25-75 %) and Peak Expiratory Flow Rate (PEFR). (justia.com)
- PEFR can be measured with spirometers or with simpler mechanical or electronic peak flow meters, discussed below. (justia.com)
- The peak expiratory flow (PEF), also called peak expiratory flow rate (PEFR) is a person's maximum speed of expiration, as measured with a peak flow meter, a small, hand-held device used to monitor a person's ability to breathe out air. (wikipedia.org)
- Peak flow readings are higher when patients are well, and lower when the airways are constricted. (wikipedia.org)
- Due to the wide range of 'normal' values and the high degree of variability, peak flow is not the recommended test to identify asthma. (wikipedia.org)
- A small portion of people with asthma may benefit from regular peak flow monitoring. (wikipedia.org)
- When peak flow is being monitored regularly, the results may be recorded on a peak flow chart. (wikipedia.org)
- It is important to use the same peak flow meter every time. (wikipedia.org)
- To interpret the significance of peak expiratory flow measurements, a comparison is made to reference (normal, predicted) values based on measurements taken from the general population. (wikipedia.org)
- More recently, medical calculators have been developed to calculate predicted values for peak expiratory flow. (wikipedia.org)
- There are a number of non-equivalent scales used in the interpretation of peak expiratory flow. (wikipedia.org)
- These formulas have also been trended over time in both rural and metropolitan areas both as air quality studies and as studies on asthma due to the Peak Flow measurement's accuracy as a predictor of mortality and poor prognosis. (wikipedia.org)
- The highest of three readings is used as the recorded value of the Peak Expiratory Flow Rate. (wikipedia.org)
- It may be plotted out on graph paper charts together with a record of symptoms or using peak flow charting software. (wikipedia.org)
- The measurement of peak expiratory flow was pioneered by Martin Wright, who produced the first meter specifically designed to measure this index of lung function. (wikipedia.org)
- Since the original design of instrument was introduced in the late 1950s, and the subsequent development of a more portable, lower cost version (the "Mini-Wright" peak flow meter), other designs and copies have become available across the world. (wikipedia.org)
- 1989. New regression equations for predicting peak expiratory flow in adults. (wikipedia.org)
- Peak expiratory flow meter scale changes: implications for patients and health professionals" (PDF). (wikipedia.org)
- Predicted peak expiratory flow in normal adults using Wright-scale Godfrey S, Kamburoff PL, Naim JL (1970). (wikipedia.org)
- In the RUAO group, nCPAP significantly improved stridor and dyspnoea scores, decreased the ratio of FEF 50 /FIF 50 from 2.05±0.25 to 1.42±0.16, and increased peak inspiratory flow (PIF) as well as forced inspiratory vital capacity by 26±8% and 9±4%, respectively. (elsevier.com)
- Peak flow (PEF) and maximal flows at 75%, 50% and 25% of remaining forced vital capacity (MEF75, MEF50 and MEF25) were derived from both recordings. (biomedcentral.com)
- Peak Expiratory Flow Rate" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (harvard.edu)
- This graph shows the total number of publications written about "Peak Expiratory Flow Rate" by people in Harvard Catalyst Profiles by year, and whether "Peak Expiratory Flow Rate" was a major or minor topic of these publication. (harvard.edu)
- Below are the most recent publications written about "Peak Expiratory Flow Rate" by people in Profiles. (harvard.edu)
- To evaluate tidal breathing (TB) flow-volume and flow-time curves for identification of expiratory airway obstruction in infants. (readbyqxmd.com)
- when tidal volume is precisely measured, as in gas exchange calculation, the symbol TV or V T is used. (wikipedia.org)
- 1 3-6 10 Ballard et al showed that desaturation episodes during sleep in patients with CF are associated with hypoventilation caused by a reduction in tidal volume and minute ventilation. (bmj.com)
- Reduced ventilation during REM sleep in adults with CF has also been described by Tepper et al , who propose that this could account for most of the sleep hypoxaemia in CF. 5 A decrease in the contribution of the rib cage to tidal volume breathing leads to a decrease in lung volume and to episodes of desaturation. (bmj.com)
- The variables assessed were tidal volume, breathing time and thoracoabdominal movement. (scielo.br)
- Tidal volume, pulmonary ventilation and mean inspiratory flow significantly increased in the sitting position, with no difference between the groups. (scielo.br)
- The sitting position increased tidal volume without altering breathing times. (scielo.br)
- In the present clinical trial, the investigators intend to test the hypothesis that HFO-TGI may result in improved respiratory physiology and clinical course compared to low tidal volume conventional mechanical ventilation in patients with severe ARDS. (clinicaltrials.gov)
- Tidal FL was assessed with the negative expiratory pressure (NEP) technique. (soheb.com)
- What is the normal Tidal Volume? (brainscape.com)
- EIT is useful to assess the impact of OLA on regional tidal volume distribution. (asahq.org)
- Tracings of airway pressure, esophageal pressure, flow, transpulmonary pressure, and tidal volume during each pressure-controlled mode of ventilation. (springermedizin.de)
- the tidal volume is the volume of air that is inhaled or exhaled in only a single such breath. (wikipedia.org)
- Lung function is physiologically divided into and to provide comprehensive treatment guide- four volumes: expiratory reserve volume, inspira- lines aimed at decreasing COPD-related morbid- tory reserve volume, residual volume, and tidal volume. (pdfmedarticles.com)
- Sometimes, the test will be preceded by a period of quiet breathing in and out from the sensor (tidal volume), or the rapid breath in (forced inspiratory part) will come before the forced exhalation. (academic.ru)
- Maximal Inspiratory Pressure (MIP) and Maximal Expiratory Pressure (MEP) were both measured in the seated position using a standard flanged mouthpiece.MIP was measured from Residual Volume (RV) and MEP was measured from Total Lung Capacity (TLC), both in a standard manner. (clinicaltrials.gov)
- Parameters derived from TB curves were compared to maximal expiratory flow at functional residual capacity ([Formula: see text]maxFRC) measured by rapid thoracoabdominal compression technique. (readbyqxmd.com)
- Changes in residual volume during induced bronchoconstriction in healthy and asthmatic subjects. (paperplane.me)
- Normal lung volumes ) are measured by determining functional residual capacity (FRC). (merckmanuals.com)
- Magnesium infusion was associated with significant reductions in the functional residual capacity (-0.41 l) and residual volume (-0.47 l), the mean arterial blood pressure (-5.6 mmHg) and the cardiac double product (734.8 mmHg.bpm) at rest. (scielo.br)
- Hypercapnia is 15% more common in men, and is related to the decrease in expiratory flows and increased residual volume. (omicsonline.org)
- To ensure clinical stability, patients completed the Asthma Control Questionnaire and a modified Borg dyspnea scale that was repeated at the end of the expiratory maneuvers. (harrisburgfriends.org)
- Patients were asked to perform four sets of expiratory maneuvers, one set for each device. (harrisburgfriends.org)
- Forced expiratory maneuvers may aggravate some medical conditions. (wikipedia.org)
- Figure 1 11 lung changes volume during forced breathing shows the different volumes and capacities of maneuvers. (pdfmedarticles.com)
- In the first pattern functional impairment, which is proportional to the degree of obesity is increasing diffusion of carbon monoxide (DLCO) and DLCO/alveolar ventilation (KCO) relationship, with reduced expiratory reserve volume (ERV). (omicsonline.org)
- Pulmonary Function and Flow-Volume Loop Patterns in 5 Contents Ventilation curve pattern Pressure-time diagram 6 Flow-time diagram 10 Volume-time diagram 12 Interpretation of curve patterns 14. (outstandingwriting.com)
- The pressure-volume curve of the respiratory system is a tool to monitor and set mechanical ventilation in acute lung injury. (biomedcentral.com)
- Method: Prospective study in 2 years of anthropometric and functional parameters breathing in MO, determining age, body mass index (BMI), waist, hip, wai/hip index, blood gas values, flow-volume curve, plethysmography, diffusion of CO and maximum inspiratory (MIP) and expiratory (PEM) pressures. (omicsonline.org)
- There are differences between men and women in the presence of hypercapnia and maximal respiratory pressures, without influencing the type of obesity messured with the wai/hip index. (omicsonline.org)
- f) The instrument or user of the instrument must have means of correcting volumes to a body temperature saturated with water vapor (BTPS) under conditions of varying ambient spirometer temperatures and barometric pressures. (wa.gov)
- Also, calculation of mean Pdi and ti/ttot is complicated by the difficulty in determining the baseline value of Pdi in such patients (84) (see Maximal Static Inspiratory and Expiratory Pressures in Section 2 of this Statement). (fitness-vip.com)
- PEFR is the maximal flow (or speed) achieved during the maximally forced exhalation initiated at full inhalation, measured in liters per minute. (justia.com)
- The relaxation curve of the chest wall is passed through the elastic recoil pressure of the chest at end exhalation, and the distance between the beginning of the pressure-volume loop (arrow) and the relaxation curve represents intrinsic PEEP. (fitness-vip.com)
- Airflow and lung volume measurements can be used to differentiate obstructive from restrictive pulmonary disorders, to characterize severity, and to measure responses to therapy. (merckmanuals.com)
- Most currently used devices measure only airflow and integrate time to estimate the expired volume. (merckmanuals.com)
- FEF 25-75 % is the average rate of expiratory airflow from the 25% volume point to the 75% volume point of the expiratory effort, usually expressed in liters per second. (justia.com)
- e) Instruments incorporating measurements of airflow to determine volume must conform to the same volume accuracy stated in (a) of this subsection when presented with flow rates from at least 0 to 12 liters per second. (wa.gov)
- flow-volume loop a graph of the rate of airflow as a function of lung volume during a complete respiratory cycle consisting of a forced inspiration followed by a forced expiration. (outstandingwriting.com)
- 2. To correlate the pulmonary functions (DLCO and lung volumes) with severity of airflow limitation in diabetics (NIDDM) with COPD or asthma. (grin.com)
- Measures of expiratory airflow are preserved and airway resistance is normal and the forced expiratory volume in 1 second (FEV 1 )/forced vital capacity (FVC) ratio is increased. (medscape.com)
- Functional reserve capacity (FRC) is the volume of air in the lungs when the respiratory muscles are fully relaxed and no airflow is present. (medscape.com)
- Which of the following occurs if the blood flow to alveolar units is totally obstructed by a pulmonary thromboembolism? (basicmedicalkey.com)
- Alveolar gas compression distorts the forced expiratory flow volume curve in all studied groups at the middle fraction of forced expiratory flow. (biomedcentral.com)
- Black, L. F., Offord, K., Hyatt, R. E.: Variability in the maximal expiratory flow volume curve in asymptomatic smokers and in nonsmokers. (springer.com)
- vii) Has an excessive variability between the three acceptable curves. (wa.gov)
- Mathematical models of the static pressure-volume curve of the respiratory system have been proposed to overcome the inter- and intra-observer variability derived from eye-fitting. (biomedcentral.com)
- The sweat glands produce sweat with an elevated concentration of chloride and sodium, so measurement of sweat chloride concentration is the key diagnostic test. (oncologynurseadvisor.com)
- Forced inspiratory flow: (Specific measurement of the forced inspiratory curve is denoted by nomenclature analogous to that for the forced expiratory curve. (wikipedia.org)
- Unless otherwise specified, volume qualifiers indicate the volume inspired from RV at the point of measurement. (wikipedia.org)
- To ensure the values recorded by a spirometer are an from smoking within an hour of the test, eating a large accurate measurement of respiratory manoeuvres, it is meal within 2 hours, consuming alcohol within 4 hours, important that daily calibration checks are performed. (who.int)
- A flow plethysmograph measures the volume displacement of the chest movement simultaneously with the spirometric measurement of integrated flow at the mouth. (biomedcentral.com)
- All evaluations included a 6-min walk test (6MWT), 6-min step test, COPD Assessment Test, and measurement of dyspnea by using the modified Medical Research Council dyspnea scale. (rcjournal.com)
Forced vital ca3
- The slow VC test, to discover air trapping and thus not underestimate obstruction, should always precede the forced vital capacity (FVC) test as bronchospasm (a sudden constriction of the muscles in the walls of the bronchioles) may be induced in susceptible subjects during the forced test. (personneltoday.com)
- No significant relationships were observed between AC and spirometric parameters such as % predicted forced vital capacity (FVC), % predicted forced expiratory volume in 1 s (FEV 1 ) and FEV 1 /FVC. (medsci.org)
- Plasma adiponectin levels were inversely correlated with forced expiratory volume in 1 s (FEV 1 ) per forced vital capacity in both men and women. (medsci.org)
- Lung volumes are found through Plethysmography, where a patient sits in an enclosed clear chamber and is asked to perform a series of very small panting breaths. (conemaugh.org)
- All infants with lung function tests demonstrated findings consistent with severe irreversible peripheral airway obstruction, assessed with whole body plethysmography (6/6) or the rapid thoracoabdominal compression technique (5/5). (bmj.com)
- There are many reasons for Pulmonary Function Testing, but the most common include the analysis of patients experiencing symptoms and signs of lung disease, coughing, shortness of breath, low oxygen levels, wheezing, or recurrent bronchitis. (conemaugh.org)
- Patients were clinically evaluated in the department of 'Internal Medicine' and lung function was assessed in the department of 'Pulmonary Function Testing', both from the University Hospital of Nancy. (clinicaltrials.gov)
- Pulmonary function testing is required to assess the severity of the respiratory impairment once a disease process is established by appropriate clinical and laboratory findings. (ssa.gov)
- She is referred for pulmonary function testing to assess the progression of her disease. (basicmedicalkey.com)
- Pulmonary function testing has a rich and diverse history. (springer.com)
- Within the confines of the present book, this chapter will focus on selected highlights relevant to clinical pulmonary function testing, through which we hope that the reader can gain a deeper understanding of the different tests as each is done today. (springer.com)
- The absence of depression of terminal flow rates or measurable adverse changes in other standard small airways tests suggests that chronic consumer use of this hair spray does not lead to demonstrable functional respiratory impairment in this group of originally healthy individuals. (springer.com)
- The six minute walk test (6MWT) has been used to evaluate the functional capacity of these patients, since it can be performed by severely limited individuals, and those who do not tolerate other functional capacity evaluation tests . (scirp.org)
- The purpose of this article is to illustrate pathologic conditions, namely obliterative bronchiolitis, in which expiratory CT scan can be abnormal despite normal inspiratory CT examination, and to highlight indications for this technique in patients with clinical and functional suspect of bronchiolar obstruction. (biomedcentral.com)
- Furthermore, we have highlighted the indications for expiratory CT scan in patients with clinical and functional suspect of bronchiolar obstruction. (biomedcentral.com)
- Anthropometric data were collected, and functional variables were assessed before and after the maximal stress test. (jornaldepneumologia.com.br)
- Lung volumes are used to determine the presence of restrictive or obstructive lung disease. (conemaugh.org)
- The FV curve was found to be reasonably effective in distinguishing normal subjects from those with lung disease, but did not provide a clear separation between subjects with asthma and those with other obstructive disease. (cdc.gov)
- Alterations of pulmonary function can be due to obstructive airway disease (e.g., emphysema, chronic bronchitis, asthma), restrictive pulmonary disorders with primary loss of lung volume (e.g., pulmonary resection, thoracoplasty, chest cage deformity as in kyphoscoliosis or obesity), or infiltrative interstitial disorders (e.g., diffuse pulmonary fibrosis). (ssa.gov)
- Because desaturation episodes coincided not with obstructive or central apnoeas but with a reduced end expiratory volume during REM sleep they were attributable to airway closure and to the development of underventilated lung regions. (bmj.com)
- 3 A recent study reported that lung function tests are compatible with an obstructive airway disease that does not, however, respond to treatment with glucocorticosteroids or bronchodilators. (bmj.com)
- The flow-volume loop can have four distinctive shapes that are linked to certain pathologies: obstructive lung disease, restrictive lung disease, mixed lung disease and upper airway obstructions. (outstandingwriting.com)
- Azarbarzin A, Sands SA, Marques M, Genta PR, Taranto-Montemurro L, Messineo L, White DP, Wellman A. Palatal prolapse as a signature of expiratory flow limitation and inspiratory palatal collapse in patients with obstructive sleep apnoea. (harvard.edu)
- Test performed to determine the presence of asthma. (conemaugh.org)
- The asthma control status was assessed using the asthma control test (ACT), and quality of life was assessed using the Saint George's Respiratory Questionnaire (SGRQ). (jornaldepneumologia.com.br)
- Objective: To analyze adolescents clinically diagnosed with asthma, in terms of the physiological changes occurring during acute hypoxia and during a maximal stress test. (jornaldepneumologia.com.br)
- Gaffin JM, Zhou JS, Cai Q, Petty CR, Fu C, Sheehan WJ, Baxi S, Bailey A, Gold DR, Phipatanakul W. Utility of a portable hand-held forced expiratory volume in 1 second meter for monitoring asthma in an inner-city school setting. (harvard.edu)
Lung Volumes and Capacities1
- Blood test that measures the levels of Oxygen and Carbon Dioxide levels in the blood. (conemaugh.org)
- Cohen, B. M.: Flow-based measures of nasal function. (springer.com)
- It measures lung function, specifically the amount (volume) and/or speed (flow) of air that can be inhaled and exhaled. (wikipedia.org)
- In a sample of ambulatory patients with MD1, our study was designed to prospectively achieve two aims: 1) to assess the respective prevalence of a ventilatory restrictive pattern, respiratory muscle weakness, hypoxemia and hypercapnia and 2) to evaluate whether postural changes in lung volumes contribute to sensitize the diagnosis of respiratory weakness and could be used as a predictor of poor respiratory function, including hypoxemia, hypercapnia and restrictive ventilatory disease. (clinicaltrials.gov)
- Pulmonary function test is consistent with a restrictive impairment. (basicmedicalkey.com)
- Restrictive lung diseases are characterized by reduced lung volumes, either because of an alteration in lung parenchyma or because of a disease of the pleura, chest wall, or neuromuscular apparatus. (medscape.com)
- Although there were significant (P = 0.05) rises in FVC, PEFR, FEF 25% and FEF 75% after 1 year, other changes suggestive of bronchodilatation on acute testing did not persist. (springer.com)
- All subjects were induced to acute hypoxia and were submitted to maximal stress testing. (jornaldepneumologia.com.br)
- Diagnosis of recurrent rupture of interventricular septum during acute myocardial infarction by Doppler color flow mapping. (courtfield.ml)
- The goodness-of-fit and the values of derived parameters (upper asymptote, maximum compliance and points of maximum curvature) in four sigmoid models were compared, using pressure-volume data from 30 mechanically ventilated patients during the early phase of acute lung injury. (biomedcentral.com)
- The pressure-volume curves have been widely studied in acute lung injury and the acute respiratory distress syndrome [ 2 ]. (biomedcentral.com)
- The objective of this study was to assess the goodness of fit of four previously published sigmoid models of pressure-volume curve using data from patients with acute lung injury, and to compare the values of the calculated parameters. (biomedcentral.com)
- To test the hypothesis that in early, mild, acute respiratory distress syndrome (ARDS) patients with diffuse loss of aeration, the application of the open lung approach (OLA) would improve homogeneity in lung aeration and lung mechanics, without affecting hemodynamics. (asahq.org)
- Mean airway pressure (mPaw) was set at 1 cm H2O above the point of maximal curvature (PMC) of the expiratory pressure volume curve. (clinicaltrials.gov)
- There are substantial variabilities in relevant parameters obtained from the four different models of the static pressure-volume curve of the respiratory system. (biomedcentral.com)
- Relevant data derived from the pressure-volume curve include total lung capacity, the maximal compliance and the value of the points of maximum curvature (which have been incorrectly cited in medical literature as "inflection points") of both limbs of the curve. (biomedcentral.com)
- Lung volumes and forced ventilatory flows. (paperplane.me)
- Abnormal ventilatory response to exercise ( 3 ), periodic breathing ( 4 ), and delayed oxygen uptake kinetics during recovery of maximal effort ( 5 ) have also been associated with severity of and poor prognosis in CHF. (onlinejacc.org)
- Results: No significant differences were found among the groups regarding the anthropometric variables or regarding the ventilatory variables during the stress test. (jornaldepneumologia.com.br)
- Bronchial spasm (paroxysmal and steady) - Expiratory dyspnoe, dry cough, dry rales. (hubpages.com)
- Bronchial hyperresponsiveness (BHR) and full and partial flow-volume loops were measured before and after ascent to 5000 m altitude to determine if there are changes in resting bronchial tone and BHR that might explain the symptoms. (ox.ac.uk)
- These results are consistent with the notion that airway responsiveness is influenced by airway-parenchymal interdependence and indicate that the results of bronchial provocation testing in the supine posture cannot be directly compared with those in the upright posture. (nih.gov)
- A new method for bronchial-provocation testing in asthmatic subjects using a dry powder of mannitol. (springer.com)
- ERS technical standard on bronchial challenge testing: general considerations and performance of methacholine challenge tests. (springer.com)
- In vitro potency, maximal efficacy, rate of recovery from maximal block of ENaC, and rate of drug absorption were compared for amiloride, benzamil, and phenamil in cultured human and ovine bronchial epithelial cells. (aspetjournals.org)
- Pulmonary function tests measure lung capacity to take in and release air, and how much oxygen is in the blood. (conemaugh.org)
- All pulmonary function tests met or exceeds applicable standards of the European Respiratory Society / American Thoracic Society. (clinicaltrials.gov)
- Pulmonary function tests were analyzed retrospectively in 156 infants aged 3-24 months with persistent or recurrent respiratory complaints. (readbyqxmd.com)
- Pulmonary function tests (PFT) was normal. (globalsciencejournals.com)
- Lung function tests were performed by pneumotachography, recording static lung volumes and flow-volume-curves in 262 asymptomatic non smoking males, aged 20 to 90 years. (biomedcentral.com)
- Subjects were approached a first day when a brief respiratory symptoms questionnaire was administered through a face-to-face interview and pulmonary function tests were performed. (biomedcentral.com)
- Pulmonary function tests (PFT) are a battery of tests that measure lung function and aid in the management of the respiratory disease. (lecturio.com)
- Pulmonary function tests (PFT) are mainly diagnostic/prognostic. (lecturio.com)
Liters per second1
- The modified Borg dyspnea scale has a range from 0 (no dyspnea) to 10 (maximal dyspnea treated effectively by remedies of My Canadian Pharmacy). (harrisburgfriends.org)
- The increase in volume overload leads to deterioration of compensatory mechanisms, lower compliance of the left atrium, and appearance of pulmonary hypertension 2 , dyspnea or fatigue 1 . (scielo.br)
- METHODS: BHR to histamine was measured using a turbine spirometer to record partial and full flow-volume curves and expressed as log dose slopes. (ox.ac.uk)
- The main advantage of the FOT is the simplicity of the test administration, which requires little cooperation from the patient and involves the production of parameters describing the resistive and reactive properties of the respiratory system that are complementary to traditional pulmonary assessment methods [ 3 - 5 ]. (biomedcentral.com)
- Manual methods are based on the visual identification of three linear zones of the curve, defining the points as the intersections between these three lines, the maximal compliance as the slope of the medial section and total lung capacity as the maximum value reached. (biomedcentral.com)
- The work per breath is represented by the cross-hatched area subtended by the inspiratory part of the pressure-volume loop on the left and the relaxation curve of the chest wall on the right. (fitness-vip.com)
- There are a number of different ACT's such as the active cycle of breathing technique, high-frequency chest wall oscillations, positive expiratory pressure (PEP) and oscillatory PEP. (springer.com)
- Since only a limited panel of CF mutations is routinely tested, the absence of CF mutations does not exclude the diagnosis of CF. (oncologynurseadvisor.com)
- In France a diagnosis of EIA by a physician is required, yet β 2 agonists are the drugs most commonly identified by urine tests performed during sports competitions, particularly bicycle races. (bmj.com)
- Objective Our goal was to assess the precision of the GeneXpert test in the diagnosis of pulmonary TB. (eg.net)