Department of Anaesthesia and Intensive Care, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
J Clin Monit Comput. 2010 Feb;24(1):71-2. doi: 10.1007/s10877-009-9212-x. Epub 2009 Dec 15.
The test of the inner tube integrity is an important checklist prior to the safe use of Bain's breathing system. This is because the major concern with the use of Bain's circuit is the potential malfunctioning of the circuit due to avulsion of the inner fresh gas delivery tube at the machine end which will turn the outer tube into dead space, a hazard recognized by Hannallah. Pethick test although widely used may not be foolproof to detect leaks in the inner tube. Ghani suggested the use of a plunger to perform the inner tube occlusion. Partially or completely occluded outer tube may produce a false positive result. Using very high flows or prolonged occlusion may cause damage to anesthetic machine due to high pressure.
内管完整性测试是安全使用 Bain 呼吸系统前的重要检查清单。这是因为使用 Bain 回路的主要关注点是由于机器端的新鲜气体输送内管的撕裂，使外管变成死腔，从而导致回路出现潜在故障，这是 Hannallah 所认识到的危险。虽然广泛使用的 Pethick 测试可能无法万无一失地检测内管泄漏。Ghani 建议使用柱塞来进行内管堵塞。部分或完全堵塞的外管可能会产生假阳性结果。使用非常高的流量或长时间堵塞可能会由于高压而对麻醉机造成损坏。
