Peak expiratory flow profiles delivered by pump systems. Limitations due to wave action.
作者： MARTIN R. MILLER , BARRIE JONES , YONG XU , OLE FIND PEDERSEN , PHILIP H. QUANJER
DOI: 10.1164/AJRCCM.161.6.9805085
关键词:
摘要: Pump systems are currently used to test the performance of both spirometers and peak expiratory flow (PEF) meters, but for certain profiles input signal (i.e., requested profile) output profile can differ. We developed a mathematical model wave action within pump compared recorded with predicted by model. Three American Thoracic Society (ATS) four artificial flow-versus-time were delivered pump, first pneumotachograph (PT) on its own, then PT 32-cm upstream extension tube (which would favor action), lastly in series immediately downstream mini-Wright meter. With seven was 2.4 ± 1.9% (mean SD) higher than pump's flow, similarly 2.3 2.3% as place, 6.6...
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