Diurnal Variation in Peak Expiratory Flow and Forced Expiratory Volume
نویسندگان
چکیده
منابع مشابه
Peak expiratory flow rate as a surrogate for forced expiratory volume in 1 second in COPD severity classification in Thailand
BACKGROUND There are limited studies directly comparing correlation and agreement between peak expiratory flow rate (PEFR) and forced expiratory volume in 1 second (FEV1) for severity classification of COPD. However, clarifying the role of PEFR as a surrogate of COPD severity classification instead of FEV1 is essential in situations and areas where spirometry is not routinely available. PURPO...
متن کاملPeak Expiratory Flow Rate in Healthy Children from Tehran
Background: Measuring peak expiratory flow rate has been suggested as an important tool in asthma management by all international guidelines. Objective: Studies on various populations have shown considerable variations in normal values of peak expiratory flow rate. Since reference standards for Iranian children are not available, the present study was performed to establish these standards. Me...
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v Zuskin, E., and Vali, F. (1971). Brit. J. industr. Med., 28, 159-163. Peak flow rate in relation to forced expiratory volume in hemp workers. Measurements of the forced expiratory volume in one second (FEV1.0) and the peak expiratory flow rate (PEF) were made in 99 non-smoking female hemp workers before and after the shift. A significant mean reduction of both FEV1.o and PEF (P < 0-01) over t...
متن کاملValidity of forced expiratory flow volume loops in neonates.
It is claimed that suddenly squeezing a newborn baby's trunk with a pressure of 3-4 kPa produces a flow volume curve that can be used to measure the function of the small airways. If the squeeze is applied during expiration rather than at the end of inspiration, however, anomalous results may be obtained. One possible explanation is that the babies are limiting expiratory flow by making inspira...
متن کاملValidity of forced expiratory flow volume loops in neonates
It is claimed that suddenly squeezing a newborn baby's trunk with a pressure of 3-4 kPa produces a flow volume curve that can be used to measure the function of the small airways. If the squeeze is applied during expiration rather than at the end of inspiration, however, anomalous results may be obtained. One possible explanation is that the babies are limiting expiratory flow by making inspira...
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ژورنال
عنوان ژورنال: JOURNAL OF CLINICAL AND DIAGNOSTIC RESEARCH
سال: 2015
ISSN: 2249-782X
DOI: 10.7860/jcdr/2015/15156.6661