Brandt L, Renz D, Pokar H
Anaesthesist. 1981 Apr;30(4):200-5.
The main cause for the rise in cuff-pressure during anesthesia is the diffusion of nitrous oxide into the tube cuff. Gas-diffusion induced pressure changes in low pressure-high volume cuffs are registered continuously. Exposure of an air-filled cuff into an anaesthetic gas atmosphere in vitro shows, that there is an increase in cuff-pressure up to 150 mm Hg within 8 hours. This pressure-plateau remains for several hours. In intubated patients cuff-pressure increases even more. During anesthesia lasting 4--5 hours we recorded pressures up to 150 mm Hg, too. To prevent these high pressures we recommend the reducing of cuff-volume within defined times of anesthesia or, alternatively, the use of the anesthetic gas mixture as cuff inflating gas.
麻醉期间袖带压力升高的主要原因是氧化亚氮扩散到气管导管的袖带中。在低压大容量袖带中，气体扩散引起的压力变化会持续记录下来。体外将充有空气的袖带暴露于麻醉气体环境中显示，8小时内袖带压力可升高至150 mmHg。这种压力平台会持续数小时。在插管患者中，袖带压力升高得更多。在持续4至5小时的麻醉过程中，我们也记录到了高达150 mmHg的压力。为防止出现这些高压，我们建议在规定的麻醉时间内减小袖带容量，或者使用麻醉气体混合物作为袖带充气气体。
