Helms P, Taylor B W, Milner A D, Hatch D J
J Appl Physiol Respir Environ Exerc Physiol. 1982 Jan;52(1):267-73. doi: 10.1152/jappl.1982.52.1.267.
In infants and very young children changes in thoracic gas volume (Vtg) during tidal breathing and during intermittent positive-pressure lung inflations have been estimated from pressure changes within double-layered rubber jackets covering the thorax and abdomen. In vitro and in vivo assessments demonstrated the linearity of these jackets over the range of volume changes found in these young subjects during respiratory function tests, and the small intrajacket background pressure (2.5 cmH2O) had minimal effects on resting lung volume and lung mechanics. These jackets can be used to monitor tidal volume in quiet subjects, and if an intermittent positive-pressure inflation technique is used static compliance can be accurately measured. The hysteresis of natural rubber and the direct contact of the recording system with the subject renders it unsuitable for the measurement of lung mechanics during tidal breathing and for the estimation of Vtg during airway occlusions.
在婴儿和非常年幼的儿童中，通过覆盖胸部和腹部的双层橡胶套内部的压力变化，已估算出潮式呼吸期间和间歇性正压肺充气期间的胸廓气体容积（Vtg）。体外和体内评估表明，在这些年轻受试者呼吸功能测试中发现的容积变化范围内，这些橡胶套具有线性关系，并且套内背景压力较小（2.5 cmH₂O）对静息肺容积和肺力学的影响最小。这些橡胶套可用于监测安静受试者的潮气量，并且如果使用间歇性正压充气技术，可以准确测量静态顺应性。天然橡胶的滞后现象以及记录系统与受试者的直接接触，使其不适用于潮式呼吸期间肺力学的测量以及气道阻塞期间Vtg的估算。
