Hannallah M S, Benumof J L, Bachenheimer L C, Mundt D J
Department of Anesthesia, Georgetown University Medical Center, Washington, DC 20007.
Anesth Analg. 1993 Dec;77(6):1222-6. doi: 10.1213/00000539-199312000-00024.
The resting volume of a low-pressure, high-volume cuff is an important factor that determines the cuff compliance, because it is the maximum volume that maintains the low-pressure characteristics of the cuff. Modern polyvinyl chloride (PVC) double-lumen tubes (DLT) are designed with a low-pressure bronchial cuff to minimize the risk of bronchial damage. Maintenance of the low-pressure characteristics of this cuff, however, requires knowledge of how its resting volume and compliance vary between different DLT sizes and brands, and how the compliance changes when the cuff is inflated inside different-sized bronchi. We, therefore, measured the bronchial cuff pressure-volume relationship for each of the adult sizes, 35 Fr, 37 Fr, 39 Fr, and 41 Fr, of the Mallinckrodt, Sheridan, Rusch, and Portex left DLTs. The compliance of each cuff was characterized by: 1) the cuff resting volume, defined as the smallest cuff volume beyond which a 0.5-mL increase in volume resulted in more than 10 mm Hg increase in cuff pressure; and 2) the cuff pressure at 3-mL volume. Measurements were repeated for sizes 35 Fr and 41 Fr left Mallinckrodt DLTs with the bronchial cuff lying inside two canine left main-stem bronchi measuring 11 mm and 13 mm in diameter. The bronchial cuff resting volume ranged from 1.5 to 5.0 mL in different sizes and brands of DLTs, which could be explained by differences in cuff size between different manufacturers and between different DLT sizes of the same manufacturer.(ABSTRACT TRUNCATED AT 250 WORDS)
低压、大容量袖带的静息容积是决定袖带顺应性的一个重要因素，因为它是维持袖带低压特性的最大容积。现代聚氯乙烯（PVC）双腔导管（DLT）设计有低压支气管袖带，以尽量降低支气管损伤风险。然而，要维持该袖带的低压特性，需要了解其静息容积和顺应性在不同DLT尺寸和品牌之间如何变化，以及当袖带在不同尺寸支气管内充气时顺应性如何改变。因此，我们测量了 Mallinckrodt、Sheridan、Rusch 和 Portex 左 DLT 成人尺寸（35 Fr、37 Fr、39 Fr 和 41 Fr）中每个型号的支气管袖带压力 - 容积关系。每个袖带的顺应性通过以下方式表征：1）袖带静息容积，定义为袖带容积最小增加值超过 0.5 mL 会导致袖带压力升高超过 10 mmHg 的最小袖带容积；2）3 mL 容积时的袖带压力。对于 35 Fr 和 41 Fr 的左 Mallinckrodt DLT，当支气管袖带置于两条直径分别为 11 mm 和 13 mm 的犬左主支气管内时，重复进行测量。不同尺寸和品牌的 DLT 中，支气管袖带静息容积在 1.5 至 5.0 mL 之间，这可以通过不同制造商之间以及同一制造商不同 DLT 尺寸之间袖带大小的差异来解释。（摘要截短于 250 字）
