Brown R, Hoppin F G, Ingram R H, Saunders N A, McFadden E R
J Appl Physiol Respir Environ Exerc Physiol. 1978 Mar;44(3):469-73. doi: 10.1152/jappl.1978.44.3.469.
In a body plethysmograph we have demonstrated differences in total lung capacity (TLC) derived from panting maneuvers performed at different levels in the vital capacity. In almost all cases, the discrepancies were due to the magnitude of the abdominal gas volume (AGV) and the relative magnitude of abdominal and thoracic pressure swings during the panting mandeuver. When panting was performed at functional residual capacity (FRC), the effect of AGV compression on the determination of thoracid gas volume (TGV) was small. Of 11 individuals studied 2 were known to have mild asthma. Compression and decompression of AGV appeared to be an insufficient explanation for discrepancies in derived TLC's in these two, suggesting that other as yet unidentified factors may influence the plethysmographic determination of TGV.
在体容积描记仪中，我们已经证明，通过在肺活量的不同水平进行喘气动作得出的肺总量（TLC）存在差异。在几乎所有情况下，差异都归因于腹部气体容积（AGV）的大小以及喘气动作期间腹部和胸廓压力波动的相对大小。当在功能残气量（FRC）时进行喘气时，AGV压缩对胸腔气体容积（TGV）测定的影响较小。在研究的11名个体中，已知2人患有轻度哮喘。AGV的压缩和减压似乎不足以解释这两人中得出的TLC差异，这表明其他尚未确定的因素可能会影响TGV的容积描记法测定。
