Eagle C C
Anaesth Intensive Care. 1992 May;20(2):156-60. doi: 10.1177/0310057X9202000206.
The relationship between a person's height and the dimensions of that person's upper airways has been studied in adult subjects. Using this relationship, formulae have been derived which predict appropriate lengths for endotracheal tubes. The formulae are as follows: 1. Orotracheal tube (teeth to mid-point of trachea) = Subject height (cm)/10 + 2 2. Orotracheal tube (teeth to mid-point of trachea + 3 cm) = Subject height (cm)/10 + 5 3. Nasotracheal tube (external naris to mid-point of trachea) = Subject height (cm)/10 + 8 These formulae are not foolproof but provide a useful working guide. All usual comfirmatory tests of correct placement should be employed.
成人受试者的身高与上呼吸道尺寸之间的关系已得到研究。利用这种关系，已推导出预测气管内导管合适长度的公式。公式如下：1. 口气管导管（牙齿到气管中点）=受试者身高（厘米）/10 + 2；2. 口气管导管（牙齿到气管中点 + 3厘米）=受试者身高（厘米）/10 + 5；3. 鼻气管导管（外鼻孔到气管中点）=受试者身高（厘米）/10 + 8。这些公式并非万无一失，但提供了一个有用的操作指南。应采用所有常规的确认导管正确位置的测试。
