Bouvier J R
Heart Lung. 1981 Jul-Aug;10(4):686-90.
A three-part study identified factors essential to accurate determination of pressure exerted against the lateral wall of the trachea by three types of endotracheal tube cuffs. Part I compared 31 mercury sphygmomanometer measurements of tracheal cuff pressures to those of pressure-sensitive aneroid Portex manometer during simulated intubation and found 99.28% of mercury manometer readings accurate to within 2 mm Hg of Portex readings. Part II demonstrated that cuff compliance (i.e., the distensibility of the cuff material) influences such pressure determinations. Part III compared two methods of obtaining tracheal cuff pressure readings with the mercury sphygmomanometer during simulated intubation. Accurate measurement was made only with a stopcock system that simultaneously opened to the cuff, the manometer, and the inflator syringe and when a separate cuff distensibility factor was used in the computation.
一项分为三个部分的研究确定了准确测定三种类型气管插管套囊对气管侧壁施加压力的关键因素。第一部分在模拟插管过程中，将31次用汞柱式血压计测量的气管套囊压力与压力敏感型无液Portex压力计测量的结果进行了比较，发现汞柱式血压计读数的99.28%与Portex读数的误差在2毫米汞柱以内。第二部分表明，套囊顺应性（即套囊材料的可扩张性）会影响此类压力测定。第三部分在模拟插管过程中，比较了用汞柱式血压计获取气管套囊压力读数的两种方法。只有在使用旋塞系统同时向套囊、压力计和充气注射器开放，并且在计算中使用单独的套囊扩张系数时，才能进行准确测量。
