Finholt D A, Audenaert S M, Stirt J A, Marcella K L, Frierson H F, Suddarth L T, Raphaely R C
Anesth Analg. 1986 Jun;65(6):667-71.
Endotracheal tube "leak" is often estimated in children to judge the fit of uncuffed endotracheal tubes within the trachea. Twenty-five swine were intubated with uncuffed tracheal tubes to determine whether a more sensitive measurement of leaks could be devised and whether leak pressure estimates fit between tracheal tube and trachea. We compared leak pressure measurement using a stethoscope and aneroid manometer with a technique using a microphone, pressure transducer, and recorder, and found no differences between the two methods. The tracheas were then removed and slides prepared of tracheal cross-sectional specimens. Regression analysis revealed a linear relationship between tracheal lumen size and tracheal tube size for both low leak pressure (y = -0.4 + 0.79x, r = 0.88, P less than 0.05) and high leak pressure (y = -2.9 + 0.71x, r = 0.92, P less than 0.05) groups. We conclude that leak testing with a stethoscope and aneroid manometer is sensitive and accurate, and that tracheal tube leak pressure accurately portrays fit between tube and trachea.
在儿童中，常通过评估气管内导管“漏气”情况来判断无套囊气管内导管与气管的适配程度。对25头猪进行无套囊气管插管，以确定是否能设计出一种更灵敏的漏气测量方法，以及漏气压力估计值是否符合气管导管与气管之间的情况。我们将使用听诊器和血压计测量漏气压力的方法与使用麦克风、压力传感器和记录仪的技术进行了比较，发现两种方法之间没有差异。然后取出气管并制作气管横截面标本的玻片。回归分析显示，低漏气压力组（y = -0.4 + 0.79x，r = 0.88，P < 0.05）和高漏气压力组（y = -2.9 + 0.71x，r = 0.92，P < 0.05）的气管腔大小与气管导管大小之间均呈线性关系。我们得出结论，使用听诊器和血压计进行漏气测试灵敏且准确，并且气管导管漏气压力能准确反映导管与气管之间的适配情况。
