Han Dong Woo, Shim Yon Hee, Shin Cheung Soo, Lee Youn-Woo, Lee Jong Seok, Ahn So Woon
Department of *Anesthesiology and Pain Medicine and †Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea.
Anesth Analg. 2005 May;100(5):1533-1535. doi: 10.1213/01.ANE.0000149900.68354.33.
The nasal route is preferred for fiberoptic intubation. Placing a lubricated endotracheal tube through the nostril can guide the fiberoptic scope towards the larynx. It would be helpful for optimal visualization of the vocal cord when the scope is passed through the endotracheal tube if the length of nares-vocal cord (NV length) could be predicted and the tip of the endotracheal tube could be placed close to the vocal cord. In this study we measured the NV length and examined the relationship between the NV length and various external measurements. Using a fiberoptic scope, the NV lengths were measured in 50 male and 45 female patients scheduled to undergo elective surgery under general anesthesia. In addition, the distances from the lateral border of the nares to tragus of the ear (NE distance) and to the angle of the mandible (NM distance) were measured. The age, height, and weight of all the patients were recorded. The NV length of the males was 18.3 +/- 0.8 cm, and that of the females was 16.3 +/- 0.7 cm. The relationship between the NV length and body height (P < 0.001, r = 0.755) and the NE distance (P < 0.001, r = 0.636) showed a significant correlation but NM distance did not (P = 0.075). The length of the NV cord can be predicted using the body height or the NE distance.
鼻途径是纤维支气管镜引导插管的首选。将润滑过的气管内导管经鼻孔插入可引导纤维支气管镜朝向喉部。如果能够预测鼻孔至声带的长度（NV长度）并将气管内导管尖端放置在靠近声带的位置，那么当纤维支气管镜通过气管内导管时，将有助于最佳地观察声带。在本研究中，我们测量了NV长度，并研究了NV长度与各种外部测量值之间的关系。使用纤维支气管镜，对50例计划在全身麻醉下接受择期手术的男性患者和45例女性患者测量了NV长度。此外，还测量了从鼻孔外侧缘至耳屏（NE距离）和至下颌角（NM距离）的距离。记录了所有患者的年龄、身高和体重。男性的NV长度为18.3±0.8cm，女性为16.3±0.7cm。NV长度与身高（P<0.001，r=0.755）和NE距离（P<0.001，r=0.636）之间存在显著相关性，但与NM距离无关（P=0.075）。可以使用身高或NE距离来预测NV长度。
