Peak Flow Rates in Normal and Asthmatic Children
نویسندگان
چکیده
منابع مشابه
Peak expiratory flow monitoring in asthmatic children.
OBJECTIVE To correlate forced expiratory volume in 1 second (VEF(1)) and peak expiratory flow (PEF) with clinical parameters in children with moderate and severe asthma. METHODS This was a non-concurrent cohort study, carried out at a pediatric pneumology clinic, in Belo Horizonte, MG, Brazil, between March and October 2002. The study enrolled children aged 5 to 16 years, with persistent asth...
متن کاملComparison of circadian variations using FEV1 and peak expiratory flow rates among normal and asthmatic subjects.
BACKGROUND Most studies that describe circadian variations in asthma have used maximum rate of peak expiratory flow (PEF) rather than forced expiratory volume in one second (FEV1) to assess airway calibre. This study was designed to assess circadian variations in PEF and FEV1 measured simultaneously and to compare variations in these measurements in normal and asthmatic subjects in a stable cli...
متن کاملThe influence of breathhold on peak expiratory flow in normal and asthmatic children.
We have previously demonstrated a 10% reduction in peak expiratory flow (PEF) in healthy adults following a breathhold at total lung capacity (TLC). This fall was attributed to dissipation of airway wall viscoelasticity, increasing airway wall compliance (Caw). To investigate this phenomenon in children and to determine whether the effect of breathhold would be greater in asthmatics than in nor...
متن کاملCircadian rhythm of peak expiratory flow in asthmatic and normal children.
A study was undertaken to examine the circadian rhythm of peak flow rate in asthmatic and normal children in the community by means of cosinor analysis. An initial study of 12 matched pairs of asthmatic and normal children was used to determine the mean amplitude of peak expiratory flow (PEF) variability in the two groups (7.8% and 4.4%) and the number of subjects required to show a significant...
متن کاملWave-speed-determined flow limitation at peak flow in normal and asthmatic subjects.
The purpose of this study was to examine whether peak expiratory flow is determined by the wave-speed flow-limiting mechanism. We examined 17 healthy subjects and 11 subjects with stable asthma, the latter treated with inhaled bronchodilators and corticosteroids. We used an esophageal balloon and a Pitot-static probe positioned at five locations between the right lower lobe and midtrachea to ob...
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ژورنال
عنوان ژورنال: BMJ
سال: 1962
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.1.5292.1595