نتایج جستجو برای: fef 25
تعداد نتایج: 355155 فیلتر نتایج به سال:
The purpose of the study was to investigate the effects of one night's sleep deprivation on the cardiorespiratory responses to exercise during the follicular and luteal phases of the menstrual cycle. We have studied nine, healthy females aged 24-35 years with regular menstrual cycles. Each subject performed spirometric tests at rest and then an incremental exercise testing during 11-13 days of ...
Thirty-four production workers at three chemical plants were tested for acute changes in lung function over the course of their three-day, twelve-hour workshift. Mean percentages of the predicted lung function indices (FVC, FEV, and FEF 25-75) showed a workshift decrement, particularly evident in the evening shift. A workweek effect was shown in that no recovery in mean %FEV1 and %FEF-25-75 was...
This study aimed to describe lung function in a cohort of children with cystic fibrosis (CF) who underwent infant pulmonary function tests (IPFTs) and preschool spirometry. Children performed up to four IPFTs (raised volume rapid thoracic compression technique) over 1 yr and five preschool spirometry tests over up to 2 yrs during participation in prospective, multicentre studies of infant and p...
زمینه و هدف: هدف تحقیق حاضر تعیین پاسخ شاخصهای عملکرد ریوی به فعالیت هوازی و بیهوازی در هوای آلوده بود. مواد و روش ها: در این تحقیق نیمه تجربی 20 مرد سالم به صورت تصادفی به دو گروه مساوی فعالیت و کنترل تقسیم شدند. در گروه فعالیت ابتدا یک جلسه فعالیت هوازی و پس از سه هفته استراحت، یک جلسه فعالیت بیهوازی در هوای آلوده روی دوچرخه کارسنج انجام شد. گروه کنترل همین جلسات فعالیتی را در شرایط هوای س...
OBJECTIVE To evaluate spirometric patterns of respiratory disorders and their relationship with functional severity and maximal expiratory flows at low lung volumes in patients with cystic fibrosis (CF). METHODS A retrospective cross-sectional study including adolescents and adults with CF. All of the patients were submitted to spirometry. Patients were classified as having preserved respirat...
Background Cough variant asthma (CVA) is a chronic or recurrent cough without wheezing accompanied by bronchial hyper-responsiveness and eosinophilic inflammation of the airways. This study aimed to evaluate the validity of spirometry in the diagnosis of CVA, as well as determining the specificity and sensitivity of spirometry parameters in CVA. Materials and Methods This descriptive observat...
Personal exposure and long-term health effects in survivors of the union carbide disaster at bhopal.
Nine years after the Bhopal methyl isocyanate disaster, we examined the effects of exposures among a cross-section of current residents and a subset of those with persistent symptoms. We estimated individual exposures by developing exposure indices based on activity, exposure duration, and distance of residence from the plant. Most people left home after the gas leak by walking and running. Abo...
BACKGROUND Chronic obstructive pulmonary disease (COPD) is characterized by chronic airflow limitation. The prevalence of airflow limitation in Japan is 10.9% (16.4% of males and 5.0% of females). Cigarette smoking is well known as a major cause of COPD. However, few epidemiological studies have evaluated the effects of cigarette smoking on pulmonary function in healthy subjects. METHODS Subj...
OBJECTIVES To develop mean and 95% confidence limits for the lower limit of normal (LLN) values for forced expiratory volume in 3 s (FEV3)/FVC ratio for Latin, black, and white adults; to ascertain comparative variability of the FEV1/FVC ratio, the FEV3/FVC ratio, and forced expiratory flow, midexpiratory phase (FEF(25-75)) in never-smoking adults; to evaluate their utility in measuring the eff...
Three hundred thirty-four healthy male non-smokers and 300 healthy male smokers of the age range 20-60 years were investigated for their spirometric lung functions by the method and technique recommended by American Thoracic Society. It was found that FVC, FEV1, FEV1%, FEF 200-1,200, FEF 25-75%, FEF 75-85%, MVV, and PEFR were significantly lower in smokers. When the subjects were blocked into s...
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