Kragh John F, Moore Virgil K, Aden James K, Parsons Donald L, Dubick Michael A
J Spec Oper Med. 2016 Spring;16(1):14-7.
The Combat Application Tourniquet® (C-A-T) is the standard-issue military tourniquet used in first aid in 2015, and the current model is called Generation 6. Soldiers in the field, however, have been asking for design changes in a possible Generation 7 to improve ease of use. This study compared the differential performance in use of the C-A-T in two designs: Generation 6 (C-A-T 6) versus a prototype Generation 7 (C-A-T 7).
A laboratory experiment was designed to test the performance of two tourniquet designs in hemorrhage control, ease of use, and user preference. Ten users of the two C-A-T models placed them on a manikin thigh to stop simulated bleeding. Users included trauma researchers and instructors of US Army student medics. Ten users conducted 20 tests (10 each of both designs).
Most results were not statistically significant in their difference by C-A-T design. The mean difference in blood loss was statistically significant (ρ = .03) in that the C-A-T 7 performed better than the C-A-T 6, but only in the mixed statistical model analysis of variance, which accounted for user effects. The difference in ease-of-use score was statistically significant (ρ = .002); the C-A-T 7 was easier. All users preferred the C-A-T 7.
In each measure, the C-A-T Generation 7 prototype performed similar or better than Generation 6, was easier to use, and was preferred.
战斗应用止血带（C-A-T）是2015年急救中使用的标准配发军事止血带，当前型号为第6代。然而，战场上的士兵一直要求对可能的第7代进行设计改进，以提高易用性。本研究比较了两种设计的C-A-T在使用中的差异性能：第6代（C-A-T 6）与第7代原型（C-A-T 7）。
设计了一项实验室实验，以测试两种止血带设计在出血控制、易用性和用户偏好方面的性能。两种C-A-T型号的10名使用者将它们放置在人体模型大腿上以阻止模拟出血。使用者包括创伤研究人员和美国陆军学生医护人员的教员。10名使用者进行了20次测试（每种设计各10次）。
大多数结果在C-A-T设计上的差异无统计学意义。失血的平均差异具有统计学意义（ρ = .03），即C-A-T 7比C-A-T 6表现更好，但仅在考虑用户效应的混合统计方差分析模型中如此。易用性得分的差异具有统计学意义（ρ = .002）；C-A-T 7更易于使用。所有使用者都更喜欢C-A-T 7。
在各项指标中，C-A-T第7代原型的表现与第6代相似或更好，更易于使用，且更受青睐。
