Baker P A, Depuydt A, Thompson J M D
Department of Anaesthesia, Starship Children's Health, Auckland, New Zealand.
Anaesthesia. 2009 Aug;64(8):878-82. doi: 10.1111/j.1365-2044.2009.05985.x.
Thyromental distance (TMD) measurement is commonly used to predict difficult intubation. We surveyed anaesthetists to determine how this test was being performed. Comparative accuracy of ruler measurement and other forms of measurement were also assessed in a meta-analysis of published literature. Of respondents, 72% used fingers for TMD measurement and also considered three finger widths the minimum acceptable TMD. In terms of distance, the minimum acceptable TMD was felt to be 6.5 cm by 55% of respondents. However, the actual width of three fingers was (range) 4.6-7.0 cm (mean 5.9 cm), with significant differences between genders and between proximal and distal interphalangeal joints. The meta-analysis showed ruler measurement increased test sensitivity (48% (95% CI 43-53) vs 16% (95% CI 14-19) without a ruler), when predicting difficult intubation.
颏甲距离（TMD）测量常用于预测困难插管。我们对麻醉医生进行了调查，以确定该测试的执行方式。在已发表文献的荟萃分析中，还评估了直尺测量和其他测量形式的相对准确性。在受访者中，72%使用手指进行TMD测量，并且认为三个手指宽度是可接受的最小TMD。就距离而言，55%的受访者认为可接受的最小TMD为6.5厘米。然而，三个手指的实际宽度（范围）为4.6 - 7.0厘米（平均5.9厘米），性别之间以及近端和远端指间关节之间存在显著差异。荟萃分析表明，在预测困难插管时，直尺测量提高了测试敏感性（使用直尺时为48%（95%CI 43 - 53），不使用直尺时为16%（95%CI 14 - 19））。
