Forced Mid-Expiratory Flow Can Predict Ventilatory Limitation and Exercise Capacity
نویسندگان
چکیده
منابع مشابه
Ventilatory mechanics and expiratory flow limitation during exercise in normal subjects.
We have examined the interrelationships among transpulmonary pressure, flow, and volume during exhausting exercise in 10 normal adult males. Expiratory transpulmonary pressures during exercise were compared with flow-limiting pressures measured at rest by two techniques. In no case did pressures developed during exercise exceed to an appreciable extent the flow-limiting pressures. This indicate...
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In this study the authors investigated whether expiratory flow limitation (FL) is present during tidal breathing in patients with bilateral bronchiectasis (BB) and whether it is related to the severity of chronic dyspnoea (Medical Research Council (MRC) dyspnoea scale), exercise capacity (maximal mechanical power output (WRmax)) and severity of the disease, as assessed by high-resolution comput...
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The within-breath change in reactance (Delta(rs)) measured by forced oscillation technique (FOT) at 5 Hz reliably detects expiratory flow limitation in chronic obstructive pulmonary disease (COPD). The present study compared this approach to the standard negative expiratory pressure (NEP) method. In total, 21 COPD patients were studied by applying both techniques to the same breath and in 15 pa...
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The first major advance in understanding expiratory flow limitation of the lungs came with the description of isovolume pressure-flow curves. These curves documented the existence of a volume-dependent limit to maximal expiratory flow and led directly to the description of the maximal expiratory flow-volume (MEFV) curve. Definitive modeling of flow limitation awaited the description of a locali...
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The negative expiratory pressure (NEP) method was used to detect expiratory flow limitation at rest and at different exercise levels in 4 normal subjects and 14 patients with chronic obstructive pulmonary disease (COPD). This method does not require performance of forced expirations, nor does it require use of body plethysmography. It consists in applying negative pressure (-5 cmH2O) at the mou...
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ژورنال
عنوان ژورنال: International Journal of Respiratory and Pulmonary Medicine
سال: 2019
ISSN: 2378-3516
DOI: 10.23937/2378-3516/1410104