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Forced Expiratory VolumeVital CapacitySpirometryRespiratory Function TestsAsthmaBronchial Provocation TestsBronchodilator AgentsPulmonary Disease, Chronic ObstructiveLung Diseases, ObstructiveAdministration, InhalationMethacholine ChlorideLungPeak Expiratory Flow RateAlbuterolForced Expiratory Flow RatesMaximal Midexpiratory Flow RateBronchoconstrictor AgentsBronchoconstrictionAsthma, Exercise-InducedLung Volume MeasurementsBronchial HyperreactivityResidual VolumeDyspneaAirway ObstructionMaximal Expiratory Flow RateTotal Lung CapacityDouble-Blind MethodPulmonary EmphysemaCystic FibrosisRespiration DisordersScopolamine DerivativesBronchitisAirway ResistanceNebulizers and VaporizersPulmonary VentilationSputumAnti-Asthmatic AgentsBudesonidePulmonary Diffusing CapacityInspiratory CapacityLung DiseasesSmokingCross-Over StudiesIpratropiumRespiratory MechanicsEthanolaminesSeverity of Illness IndexBronchiDustExercise ToleranceFunctional Residual CapacityRespiratory SoundsBeclomethasoneAerosolsMaximal Expiratory Flow-Volume CurvesRespiratory MusclesBronchiectasisCoughBreath TestsBronchospirometryBlood VolumeEmphysemaOccupational ExposureTerbutalineFenoterolPneumonectomyTreatment OutcomeAdrenal Cortex HormonesExercise TestTime FactorsExpiratory Reserve VolumeAdrenergic beta-AgonistsCross-Sectional StudiesProspective StudiesMetered Dose InhalersRespirationAndrostadienesPneumoconiosisOccupational DiseasesCholinergic AntagonistsBronchial SpasmHistaminePregnenedionesBronchoscopyInhalationSaline Solution, HypertonicReference ValuesLeukotriene AntagonistsFollow-Up StudiesRespiratory Tract Diseasesalpha 1-Antitrypsin DeficiencyExhalationBronchial DiseasesAir Pollutants, OccupationalRegression AnalysisGlycopyrrolateExpectorantsAnalysis of VarianceCohort StudiesHypersensitivity, Immediate
FEV1SpirometryAirflowInspiratoryVital capacityPeakCarbon monoxideChestMaximalAsthmaPulmonaryExhalationObstructiveResidual volumeLungsSymptomsTidalFunctionFunctionalMeSHVentilationReduction2019COPDSignificantlyInterstitialReserve volumeCPETSubjectsComplicationsTotalTestRadiographsMaximumResultsLowerBreathSignificant
FEV111
Spirometry7
  • Specifically, this section addresses the interpretation of spirometry, bronchodilator response, carbon monoxide diffusing capacity ( D L,CO ) and lung volumes. (ersjournals.com)
  • The sources of variation in lung function testing and technical aspects of spirometry, lung volume measurements and D L,CO measurement have been considered in other documents published in this series of Task Force reports 1 - 4 and in the American Thoracic Society (ATS) interpretative strategies document 5 . (ersjournals.com)
  • Spirometry revealed nearly normal dynamic lung volumes. (cdc.gov)
  • Identification of airway hyperresponsiveness thus has clinical value, particularly in the diagnosis of asthma in people with normal spirometry results or with symptoms uncharacteristic of asthma. (cmaj.ca)
  • Of these, more than half were found to not meet obstructive lung disease criteria on spirometry, and therefore were misdiagnosed: 62% when defined as forced expiratory volume in 1 second to forced vital capacity (FEV 1 /FVC) ratio less than the lower limit of normal and 55% when using the GOLD definition of FEV 1 /FVC less than 0.7. (the-hospitalist.org)
  • Spirometry measures the maximal expiratory flow and exhaled volume during a forced expiratory vital capacity maneuver. (medscape.com)
  • Normal standardized values for spirometry are well established for healthy, multiethnic populations. (medscape.com)
Airflow6
  • The current authors propose that reduced forced expiratory volume in one second (FEV 1 ) is more than a measure of airflow limitation, but a marker of premature death with broad utility in assessing baseline risk of chronic obstructive pulmonary disease (COPD), lung cancer, coronary artery disease and stroke, collectively accounting for 70-80% of premature death in smokers. (ersjournals.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)
  • Expiratory airflow is reduced in proportion to lung volume. (medscape.com)
  • HIV has been identified as a risk factor for emphysema (damaged alveoli), expiratory airflow limitations, gas exchange abnormalities and respiratory symptoms. (aidsmap.com)
  • Although the fine points of the definition can be debated, it is reasonable to think of asthma as a pulmonary disorder characterized by the generalized reversible obstruction of airflow and to define reversibility as a greater than 12% increase in the patient's forced expiratory volume in 1 second (FEV 1 ) that occurs either spontaneously or with therapy. (jci.org)
  • In the COPD cohort, abnormal breathlessness and leg discomfort (mBorg/6MWD>upper limit of normal) showed strong concurrent validity with worse airflow limitation, Medical Research Council breathlessness and COPD Assessment Test scores. (bvsalud.org)
Inspiratory6
  • Inspiratory and expiratory high-resolution computed tomography (HRCT) of the chest showed diffuse bronchial wall thickening, a prominent mosaic pattern, mild cylindrical bronchiectasis, and a small amount of fibrotic upper lobe scarring. (cdc.gov)
  • hNegative inspiratory force. (medscape.com)
  • h Negative inspiratory force. (medscape.com)
  • This results in delivery of 375 mcg aclidinium bromide from the mouthpiece, based on in vitro testing at an average flow rate of 63 L/min with constant volume of 2 L. The amount of drug delivered to the lungs will vary depending on patient factors such as inspiratory flow rate and inspiratory time. (rxlist.com)
  • All patients had undergone inspiratory and expiratory chest thin-section computed tomography (CT) examinations and pulmonary function tests. (scirp.org)
  • H. Arakawa and W. R. Webb, "Air Trapping on Expiratory High-Resolution CT Scans in the Absence of Inspiratory Scan Abnormalities: Correlation with Pulmonary Function Tests and Differential Diagnosis," American Journal of Roentgenology, Vol. 170, No. 5, 1998, pp. 1349-1353. (scirp.org)
Vital capacity11
Peak5
  • Thus, a conclusive diagnosis of asthma is based on tests designed to detect rapid changes in the forced expiratory volume in 1 second (FEV 1 ) or peak expiratory flow. (cmaj.ca)
  • Peak HR (95±10 vs 96±7%p), O 2pulse (13±4 vs. 14±5%p), and RER (1.15±0.11 vs. 1.16±0.08), and CI (0.91±0.20 vs. 0.94±0.11) were not different between the 'low' vs. 'normal' V̇O 2peak groups ( all P ≥0.59). (wku.edu)
  • Peak expiratory flow rate. (brighamandwomens.org)
  • Peak expiratory flow (PEF) is a measure of maximum instantaneous expiratory flow and is used as an indicator of airway caliber in asthma. (medscape.com)
  • The advantage of peak expiratory flow is that the test can be self-administered on a daily basis, and the results can be recorded manually or electronically to attain the day-to-day or intraday variability. (medscape.com)
Carbon monoxide1
  • Compared with expiratory HU attenuation, significant positive correlation was shown to FEV1.0/FVC and negative correlation to single-breath diffusion capacity for carbon monoxide, which was confirmed by a simple regression analysis. (scirp.org)
Chest9
  • Lung mechanics, exhaled NO (NOe), and TNF-alpha in serum and bronchoalveolar lavage fluid were assessed in eight closed and eight open chest, normal anesthetized rabbits undergoing prolonged (3-4 h) mechanical ventilation (MV) at low volume with physiological tidal volumes (10 ml/kg). (nih.gov)
  • Relative to initial MV on positive end-expiratory pressure (PEEP), MV at low volume increased lung quasi-static elastance (+267 and +281%), airway (+471 and +382%) and viscolelastic resistance (+480 and +294%), and decreased NOe (-42 and -25%) in closed and open chest rabbits, respectively. (nih.gov)
  • Elastance remained elevated (+23%) only in closed-chest animals, being associated with interstitial pulmonary edema, as reflected by increased lung wet-to-dry weight ratio with normal albumin concentration in bronchoalveolar lavage fluid. (nih.gov)
  • Chest radiography is usually the first test to detect interstitial lung diseases, but the chest radiograph can be normal in up to 10% of patients, especially early in the disease process. (wikipedia.org)
  • 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)
  • The volume of FRC is determined by the balance of the inward elastic recoil of the lungs and the outward elastic recoil of the chest wall. (medscape.com)
  • In cases of intrinsic lung disease, the physiological effects of diffuse parenchymal disorders reduce all lung volumes by the excessive elastic recoil of the lungs, relative to the outward recoil forces of the chest wall. (medscape.com)
  • Chest radiographs may show patchy infiltrates but are often normal (15). (cdc.gov)
  • Pulmonary function tests have been Study design and sampling criteria were bronchial asthma, chest widely used as an objective measure This cross-sectional study was cage deformities, previous chest inju- to diagnose and follow up the course conducted among normal healthy ries and/or chest operation, cardiac of therapy in lung diseases. (who.int)
Maximal2
  • The forced expiratory volume 1 or FEV 1 , that is, the maximal amount of air you can forcefully exhale in one second. (aidsmap.com)
  • Le volume expiratoire maximal par seconde (VEMS) et la capacité vitale forcée (CVF) étaient nettement supérieurs chez les garçons que chez les filles. (who.int)
Asthma4
  • Unlike obstructive lung diseases, such as asthma and chronic obstructive pulmonary disease (COPD), which show a normal or increased total lung capacity (TLC), restrictive disease are associated with a decreased TLC. (medscape.com)
  • The chronic inflammation of asthma is associated with airway hyperresponsiveness that leads to recurrent symptoms, yet lung function may nevertheless remain normal. (cmaj.ca)
  • 1 However, lung function is usually within the normal range in children 2 with asthma, so these cut-offs are not helpful. (bmj.com)
  • It has long been assumed that patients with asthma experience intermittent attacks and have relatively normal lung function during intervening periods. (jci.org)
Pulmonary1
  • All variables (age, sex, indices of pulmonary function test results, air trapping score, HU value, and rate of change in lung volume) were compared by diagnoses and air trap- ping findings cohorts. (scirp.org)
Exhalation2
Obstructive1
  • Classification of lung function revealed 23 (15%) normal, 29 (19%) obstructive, 36(23.5%) restrictive and 61(39.9%) mixed obstructive/ restrictive patterns. (who.int)
Residual volume1
Lungs7
  • Restrictive lung diseases are characterized by a reduction in FRC and other lung volumes because of pathology in the lungs, pleura, or structures of the thoracic cage. (medscape.com)
  • A test used to diagnose or monitor lung disease, measuring how much air a person can force out of their lungs in one second. (aidsmap.com)
  • In normal, healthy lungs, this will be 70% or above. (aidsmap.com)
  • This is the total volume of the lungs when filled with as much air as possible. (brighamandwomens.org)
  • This is the fastest rate that you can force air out of your lungs. (brighamandwomens.org)
  • This measure represents the volume of air that can be forced out of one's lungs in one second after taking a deep breath. (drbenkim.com)
  • Muscular weakness can also cause abnormal test results, even if the lungs are normal, that is similar to the diseases that cause smaller lungs. (ucsfhealth.org)
Symptoms1
  • That's because it confuses the symptoms with normal reactions of aging, since the disease requires several years of smoking and exposure to substances to develop completely. (hickeysolution.com)
Tidal1
Function8
  • In 1977, Fletcher and Peto 1 published their seminal paper in the British Medical Journal , demonstrating the existence of a subgroup of smokers highly susceptible to accelerated decline in lung function, as measured by forced expiratory volume in one second (FEV 1 ). (ersjournals.com)
  • Despite being cross-sectional studies, both showed that after an accumulated 20-30 pack-yr history of smoking, the normal unimodal distribution of FEV 1 seen in light or never-smokers (fig. 2a ⇓ ) had skewed left towards reduced lung function. (ersjournals.com)
  • None had relatively constant ventilatory function at either normal or suboptimal levels. (nih.gov)
  • The correlation between lung function test results and expiratory HU attenuation were analyzed. (scirp.org)
  • Est?par R. Suspected Bronchiectasis and Mortality in Adults With a History of Smoking Who Have Normal and Impaired Lung Function : A Cohort Study. (ucdenver.edu)
  • Systemic Markers of Lung Function and Forced Expiratory Volume in 1 Second Decline across Diverse Cohorts. (ucdenver.edu)
  • Objective: The objective of this study was to explore the effect of combining manual therapy with exercise on respiratory function in normal individuals. (edu.au)
  • Conclusions: Manual therapy appears to increase the respiratory function of normal individuals. (edu.au)
Functional1
MeSH1
  • Forced Expiratory Volume" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (ucdenver.edu)
Ventilation2
  • At the end of prolonged MV, TNF-alpha was practically undetectable in serum, whereas its concentration in bronchoalveolar lavage fluid was low and similar in animals subjected or not subjected to ventilation at low volume (62 vs. 43 pg/ml). (nih.gov)
  • These results indicate that mechanical injury of peripheral airways due to their cyclic opening and closing during ventilation at low volume results in changes in lung mechanics and reduction in NOe and that these alterations are not mediated by a proinflammatory process, since this is expressed by TNF-alpha levels. (nih.gov)
Reduction1
  • The many disorders that cause reduction or restriction of lung volumes may be divided into two groups based on anatomical structures. (medscape.com)
20191
  • La información más reciente sobre el nuevo Coronavirus de 2019, incluidas las clínicas de vacunación para niños de 6 meses en adelante. (stanfordchildrens.org)
COPD2
  • This decline ranged from normal age-related decline (as seen in lifelong nonsmokers) to a steep decline resulting in COPD, disabling breathlessness and premature death. (ersjournals.com)
  • The COPD rats were treated with normal saline, aminophylline, Bufei Yishen granules, electroacupuncture, or Bufei Yishen granules combined with electroacupuncture. (hindawi.com)
Significantly1
  • One second forced expiratory volumes were significantly reduced. (cdc.gov)
Interstitial1
Reserve volume2
CPET1
  • In general, the cardiopulmonary responses to CPET were normal across our cohort. (wku.edu)
Subjects2
  • Predicted values should be obtained from studies of "normal" or "healthy" subjects with the same anthropometric ( e.g. sex, age and height) and, where relevant, ethnic characteristics of the patient being tested. (ersjournals.com)
  • Criteria to define subjects as "normal" or healthy have been discussed in previous ATS and European Respiratory Society (ERS) statements 5 , 7 , 8 . (ersjournals.com)
Complications1
  • Smoking cessation has been shown to attenuate FEV 1 decline and, if achieved before the age of 45-50 yrs, may not only preserve FEV 1 within normal values but substantially reduce cardiorespiratory complications of smoking. (ersjournals.com)
Total3
  • Au total, 38 enfants souffrant d'asthme (contrôlé pour 16 d'entre eux et partiellement contrôlé pour 22 autres) ont été comparés à 16 enfants en bonne santé de même sexe et de même âge. (who.int)
  • This graph shows the total number of publications written about "Forced Expiratory Volume" by people in this website by year, and whether "Forced Expiratory Volume" was a major or minor topic of these publications. (ucdenver.edu)
  • This is the total volume of air that can be breathed out after breathing in as much as you can. (brighamandwomens.org)
Test2
  • Test results are compared with the individual's predicted normal value, based on a calculation that includes their gender, height, weight and race. (aidsmap.com)
  • Since the test involves some forced breathing and rapid breathing, you may have some temporary shortness of breath or lightheadedness. (ucsfhealth.org)
Radiographs1
  • Pneumoconiosis was diagnosed from 100 x 100 mm radiographs, and the false positives and false negatives were evaluated from normal-size radiographs from all those with a positive finding and a sample of those with a negative finding. (sjweh.fi)
Maximum1
  • Maximum mid-expiratory flow rate, also known as MMEF. (drbenkim.com)
Results1
Lower1
Breath1
  • Breath sounds were normal vesicular in character on the right side with random polyphonic rhonchi but the intensity of breath sounds on the left side was grossly reduced. (ispub.com)
Significant1
  • Significant laboratory ideals were as follows: normal autoimmune markers, normal anti-neutrophil cytoplasmic antibody level, no evidence of illness in sputum tradition, an increased serum Lonaprisan white cell count of 11.6? (mingsheng88.org)