使用无压力补偿的大型流量计的容积置换式人体体积描记器。

Volume-displacement body plethysmograph using a large flowmeter without pressure compensation.

作者信息

Griffin P M, Zamel N

出版信息

J Appl Physiol Respir Environ Exerc Physiol. 1979 Nov;47(5):1127-30. doi: 10.1152/jappl.1979.47.5.1127.

DOI:10.1152/jappl.1979.47.5.1127

Abstract

A modification of the conventional volume-displacement whole-body plethysmograph was done using a low-resistance flow element and integrating the plethysmographic pressure signal. A flow element with a resistance of 0.036 cmH2O/(l/s), linear to 75 l/s was fitted to a 440-liter plethysmograph, resulting in an instrument with a volume-amplitude-frequency response flat to 15 Hz and in phase with mouth flow and esophageal catheter-balloon to at least 15 Hz without pressure compensation.

摘要

使用低阻力流量元件并对体积描记压力信号进行积分，对传统的容积置换式全身体积描记器进行了改进。将一个电阻为0.036 cmH₂O/（l/s）、在高达75 l/s范围内呈线性的流量元件安装到一个440升的体积描记器上，从而得到一种仪器，其体积-振幅-频率响应在15 Hz以内保持平坦，并且在无压力补偿的情况下，与口腔气流和食管导管球囊的相位在至少15 Hz时保持一致。