Willis B A, Latto I P, Dyson A
Department of Anaesthetics, University Hospital of Wales, Health Park, Cardiff.
Anaesthesia. 1988 Apr;43(4):312-4.
Seventy-one adult patients (31 male, 40 female) who presented for surgery underwent orotracheal intubation with Portex Blue Line standard cuff disposable tubes (9-mm for males, 8-mm for females). The tracheal tube cuff was inflated by a trained assistant using a syringe and the initial cuff pressure measured; the minimum cuff pressure required to prevent respiratory gas leakage was also measured and the cuff pressure maintained above this pressure throughout the operation by means of the Cardiff Cuff Controller. Initial cuff pressure values averaged 11.9 kPa for males and 13.5 kPa for females compared with minimum cuff pressure values of 5.2 and 1.2 kPa, respectively. The differences between initial and minimum pressures were statistically highly significant (p much less than 0.001). It is concluded that the present method of inflation may lead to gross overinflation of tracheal tube cuffs and that cuff pressure monitoring may be performed simply by means of an electropneumatic controller. The difference in minimum cuff pressure between males and females suggests that the difference in tracheal size between the sexes is greater than the 9-mm to 8-mm difference in tracheal tube size.
71例成年手术患者（男31例，女40例）接受了经口气管插管，使用的是Portex蓝线标准带套囊一次性气管导管（男性用9毫米，女性用8毫米）。气管导管套囊由一名经过培训的助手用注射器充气，并测量初始套囊压力；还测量了防止呼吸气体泄漏所需的最小套囊压力，并在整个手术过程中通过卡迪夫套囊控制器将套囊压力维持在该压力之上。男性的初始套囊压力平均值为11.9千帕，女性为13.5千帕，而最小套囊压力值男性为5.2千帕，女性为1.2千帕。初始压力与最小压力之间的差异在统计学上具有高度显著性（p远小于0.001）。结论是，目前的充气方法可能导致气管导管套囊过度充气，并且可以通过电动气动控制器简单地进行套囊压力监测。男性和女性最小套囊压力的差异表明，两性之间气管大小的差异大于气管导管大小9毫米至8毫米的差异。
