• Spirometry in the asthmatic child: is FEF25-75 a more sensitive test than FEV1/FVC? (nih.gov)
  • The 2005 American Thoracic Society (ATS)/European Respiratory Society (ERS) spirometry guidelines define valid tests as having three acceptable blows and a repeatable forced vital capacity (FVC) and forced expiratory volume in 1 s (FEV1). (ersjournals.com)
  • Spirometry results from 7777 normal subjects aged 8-80 years (NHANES (National Health and Nutrition Examination Survey) III) were assigned quality grades A to F for FVC and FEV1 by a computer and one reviewer (reviewer 1). (ersjournals.com)
  • The NHANES (National Health and Nutrition Examination Survey) III spirometry data were collected with the aim of each subject trying to exhale for at least 6 s, with a minimum of five blows and a repeatable FVC and FEV1 within 5% or 100 mL. (ersjournals.com)
  • To calculate lung function growth, which is determined primarily by changes in lung capacity as a child grows, the researchers used spirometry, a technique which measures the volume and speed of air as it is exhaled from the lungs. (eurekalert.org)
  • SGOT 19 U/L, SAP 193 U/L. Spirometry showed forced expiratory volume in one second (FEV1%) of 48 and FEV1of 770ml (24% of predicted). (ispub.com)
  • Study participants underwent lung function testing, called spirometry , which measures the amount of air a person can breathe out in one second (forced expiratory volume or FEV1) and the total volume of air they can breathe in one forced breath (forced vital capacity or FVC). (medicinenet.com)
  • Recognize the importance of the use of spirometry, and Forced Expiratory Volume (FEV1) as a tool in the management of COPD. (chestnet.org)
  • The case group showed significant improvements in clinical symptoms such as cough, wheezing and dyspnoea and in all spirometry parameters (FVC, FEV1 and FEV1/FVC). (who.int)
  • Should FEV1/FEV6 replace FEV1/FVC ratio to detect airway obstruction? (nih.gov)
  • Total numbers and the ratio of FEV1 to FVC are used to assess lung function. (doterra.com)
  • The aim was to study the association between plasma proteomics and forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC) and FEV1/FVC ratio. (lu.se)
  • Offspring Study (total n=2874), to cross-sectionally study 242 cardiovascular disease-and metabolism-linked proteins in relation to FEV1, FVC (both % predicted) and FEV1/FVC ratio. (lu.se)
  • No proteins were associated with FEV1 /FVC ratio. (lu.se)
  • Four proteins associated with only FVC and none with FEV1/FVC ratio, suggesting associations mainly through lung volume, not airway obstruction. (lu.se)
  • 10 11 12 The strong inverse relations found between mortality and FEV1 in each of these diseases suggest that poor respiratory function has a predictive or even causal role in a wide range of conditions, not only respiratory disease. (bmj.com)
  • At the same day the C-ACT/ACT questionnaires, the classification of the degree of asthma control proposed by the GINA were applied and the FEV1 value obtained by spirometric examination. (bvsalud.org)
  • The results found in this study indicate that FEV1 measurement is a useful component among the instruments for assessing clinical control of asthma by GINA. (bvsalud.org)
  • Many studies have investigated the usefulness of FEV(1)/forced expired volume in 6 s (FEV(6)) measurements as an alternative for FEV(1)/FVC for diagnosis of airway obstruction. (nih.gov)
  • FEV1 is considered to be one of the most important measures of pulmonary function. (drbenkim.com)
  • Pulmonary symptoms may include chest tightness (2) and reduced forced expiratory volume in 1 sec (FEV1) (4). (cdc.gov)
  • 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)
  • and the PEF, or peak expiratory flow, which is the maximal flow achieved when air is forcibly exhaled immediately after being inhaled. (eurekalert.org)
  • Symptom scores, beta 2 agonist usage, FEV1, and peak flow variability were not related to any of the cell counts. (bmj.com)
  • or = 50% predicted, concentration of histamine causing a 20% fall in FEV1 (PC20) 0.02-7.6 mg/ml) on regular treatment with inhaled steroids entered the study. (bmj.com)
  • Changes in pressure inside the box help determine the lung volume. (medlineplus.gov)
  • Lung volume can also be measured when you breathe nitrogen or helium gas through a tube for a certain period of time. (medlineplus.gov)
  • The concentration of the gas in a chamber attached to the tube is measured to estimate the lung volume. (medlineplus.gov)
  • This decrease in lung volume promotes atelectasis in the dependent lung regions and persists for more than 24 hours in 50% of patients. (medscape.com)
  • It shows limited evidence of a causal association between exposure to organic dust and change in lung function, with a small significant excess decline in only forced expiratory volume in the 1st s of 4.92 mL/year (95% CI 0.14 to 9.69) among exposed compared with controls. (bmj.com)
  • The grades in this category look at the FEV1 score as a percentage of the predicted score. (medicalnewstoday.com)
  • Interventions for tobacco smoking cessation in adults, including pregnant persons: US Preventive Services Task Force recommendation statement. (pharmacytimes.com)
  • In combination with neuromuscular blockers, anesthetic agents cause diaphragm and chest wall relaxation, which results in a marked reduction in the functional reserve capacity and, thereby, thoracic volume. (medscape.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)
  • 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)
  • Smokers with reduced FEV1 should form a priority group for targeted advice to stop smoking. (bmj.com)
  • Since the test involves some forced breathing and rapid breathing, you may have some temporary shortness of breath or lightheadedness. (medlineplus.gov)
  • We present an analysis of the relation between FEV1 and mortality in the Renfrew and Paisley survey. (bmj.com)
  • Children who lived within 500 meters of freeway traffic were measured to have smaller eight-year increases in FEV1 and MMEF, which translated to a significant decrease in predicted lung function at 18 years of age. (drbenkim.com)
  • Participants in the LoCalMed group had significant decreases in BMI and increases in FEV1 compared with those in the usual care group. (medscape.com)
  • 17 Thus, it provides an opportunity to assess accurately the steepness of the risk gradients with FEV1 for several causes of death, while controlling for possible confounding variables, particularly cigarette smoking. (bmj.com)
  • There are several systems in place that use FEV1 and other factors to assess life expectancy. (medicalnewstoday.com)
  • 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)
  • Its most recent guidelines involve the FEV1 test results as an indicator of severity. (medicalnewstoday.com)
  • Their results on the Forced Expiratory Volume (FEV1) test improved by about 130 to 200 milliliters more compared to those assigned to placebo. (thedoctorwillseeyounow.com)
  • Results Plasma fatty acid-binding protein 4, interleukin-1 receptor antagonist, interleukin-6 and leptin were negatively associated with FEV1 and paraoxonase 3 was positively associated therewith. (lu.se)
  • Maximum mid-expiratory flow rate, also known as MMEF. (drbenkim.com)
  • Significant trends of increasing risk with diminishing FEV1 are apparent for both sexes for all the causes of death examined after adjustment for age, cigarette smoking, diastolic blood pressure, cholesterol concentration, body mass index, and social class. (bmj.com)
  • Meta-analysis revealed an overall small significant excess loss in forced expiratory volume in the 1st s for exposed compared with controls of 4.92 mL/year (95% CI 0.14 to 9.69). (bmj.com)
  • There was a significant reversibility of 230 ml in FEV1 after inhaled salbutamol. (ispub.com)
  • We gave priority to systematic reviews and meta-analyses, as well as professional society task force and practice parameter papers. (bmj.com)
  • Mean deviations from NHANES III predicted for FVC and FEV1 were examined by quality grade (A to F). (ersjournals.com)
  • 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)
  • The aim of this study was to determine how reviewer and computer-determined ATS/ERS quality could affect population reference values for FVC and FEV1. (ersjournals.com)
  • 2 standard deviations (SD) below the mean (-2 SD), whereas 8 had a normal FEV1. (nih.gov)
  • While some data exist on biomarkers that are related to FEV1, we sought to do a systematic analysis of causal relations of biomarkers with FEV1. (researchgate.net)
  • People with markers of low vitamin K levels had lower FEV1 and lower FVC on average. (medicinenet.com)
  • Reduced FEV1 was also associated with an increased risk for each cause of death examined except cancer for lifelong nonsmokers. (bmj.com)