Heath P J, Marks L F
Shackleton Department of Anaesthetics, Southampton General Hospital.
Anaesthesia. 1991 Mar;46(3):213-6. doi: 10.1111/j.1365-2044.1991.tb09412.x.
Undetected defects in the inner tube of the Bain coaxial anaesthetic breathing system may result in a greatly increased apparatus deadspace. Several authorities have advocated tests intended to detect inner tube problems; however, the efficacy of these tests has never been validated. In this study none of the tests were able to detect all the induced defects. A modification of an existing test using the backbar pressure-relief valve and a new double occlusion test were sufficiently sensitive to detect all defects.
贝恩同轴麻醉呼吸系统内管中未被检测到的缺陷可能会导致设备死腔大幅增加。一些权威机构提倡进行旨在检测内管问题的测试；然而，这些测试的有效性从未得到验证。在本研究中，没有一种测试能够检测出所有诱发的缺陷。一种使用后杆压力释放阀对现有测试的改进方法和一种新的双重阻塞测试足够灵敏，能够检测出所有缺陷。
