Estimating Airway Resistance from Forced Expiration in Spirometry
نویسندگان
چکیده
منابع مشابه
Airway area distribution from the forced expiration maneuver.
The maximal expiratory flow-volume (MEFV) maneuver is a commonly used test of lung function. More detailed interpretation than is currently available might be useful to understand disease better. We propose that a previously published computational model (Lambert RK, Wilson TA, Hyatt RE, and Rodarte JR. J Appl Physiol 52: 44-56, 1982) can be used to deduce, from the MEFV curve, the serial distr...
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BACKGROUND Vital capacity is a key parameter in the determination of lung function, usually assessed by means of a forced expiration maneuver. This maneuver can be exhausting, and patients often cannot complete it. OBJECTIVES This study evaluates a method to estimate forced vital capacity (FVC) based on the extrapolation of volume-time curves from forced expiration. METHODS The algorithm wa...
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BACKGROUND Pulmonary function has been reported in mice using negative pressure-driven forced expiratory manoeuvres (NPFE) and the forced oscillation technique (FOT). However, both techniques have always been studied using separate cohorts of animals or systems. The objective of this study was to obtain NPFE and FOT measurements at baseline and following bronchoconstriction from a single cohort...
متن کاملReferences values for forced spirometry
Selected sets of reference values for forced spirometry derived from nonsmoking, white subjects [1] show marked differences among studies [2–6] in both predicted forced vital capacity (FVC) (up to 640 mL) and predicted forced expiratory volume during the first second (FEV1) (up to 310 mL). The magnitude of the differences among reference values gives rise to potential concerns for the clinical ...
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BACKGROUND Spirometric parameters are the mainstay for diagnosis of COPD, but cannot distinguish airway obstruction from emphysema. We aimed to develop a computer model that quantifies airway collapse on forced expiratory flow-volume loops. We then explored and validated the relationship of airway collapse with computed tomography (CT) diagnosed emphysema in two large independent cohorts. MET...
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ژورنال
عنوان ژورنال: Applied Sciences
سال: 2019
ISSN: 2076-3417
DOI: 10.3390/app9142842