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骨科四肢手术应用止血带早已普及,由于止血带阻断肢体血流,可使手术野组织结构清晰,对主要血管、神经、容易辨认,不致误伤。同时也减少给患者补液输血,减轻了工作量及国家与患者的经济负担。但由于各种原因,在应用止血带的同时也出现不少问题和并发症,使应用止血带受到一定限制。表现在如下几个方面: （1）漏气。这是普通空气止血带常见的一个问题,用这种止血带（普通）,手术当中经常漏气,而在压力表上又显示不出来。因此手术当中多次反复驱血,给手术带来很大的不方便。 （2）压力的大小及时间的长短不易掌握。压力过大或时间过长可给肢体造成很大的危险,这就需要有专人严格记录使用时间,压力过小
The use of tourniquets in orthopaedic surgery has long been popular. Because tourniquets block blood flow to the limbs, the structure of the surgical field can be made clear, and the main blood vessels and nerves can be easily identified without accidental injury. At the same time, it also reduces blood transfusion for patients, reducing the workload and the economic burden on the country and patients. However, due to various reasons, there are also many problems and complications in the application of the tourniquet, which limits the application of the tourniquet. Performance in the following areas: (1) leak. This is a common problem with common air tourniquets. With this type of tourniquet (general), there is often a leak in the procedure and it is not shown on the pressure gauge. Therefore, repeated blood-sweeping during surgery has brought great inconvenience to surgery. (2) The size of the pressure and the length of time are not easy to grasp. Excessive pressure or excessive time can cause great danger to the limbs, which requires someone to strictly record the use of time, the pressure is too small