Nevill Hall Hospital, Abergavenny, UK.
Anaesthesia. 2010 Aug;65(8):785-91. doi: 10.1111/j.1365-2044.2010.06413.x. Epub 2010 Jun 22.
We studied the effect of pilot balloon design on the ability of experienced anaesthetists to assess and inflate tracheal tube cuffs to safe pressures. A model trachea was designed, incorporating a degree of compliance and an air leak, to evaluate six different pilot balloons grafted onto identical tracheal tubes. Pilot balloons were inflated to one of four pressures and anaesthetists were asked to estimate whether the pressure was acceptable, too low or too high. Anaesthetists were then asked to inflate the cuff of each tube. Overall, 103 (42.9%) of anaesthetists' assessments of tracheal tube cuff pressures were correct (33% correct would be expected by chance, p = 0.002). Pressures generated by anaesthetists inflating tracheal tube cuffs were very variable. Median (IQR [range]) pressures for each pilot balloon ranged from 29 (17-43 [9-56]) cmH(2)O to 74 (49-114 [4-140]) cmH(2)O (p < 0.001). The design of the pilot balloon significantly affects anaesthetists' ability to inflate tracheal tube cuffs to safe pressures.
我们研究了飞行员气球设计对经验丰富的麻醉师评估和充气气管套囊至安全压力能力的影响。设计了一个模型气管，其中包含一定程度的顺应性和空气泄漏，以评估六种不同的飞行员气球与相同的气管导管连接。将飞行员气球充气至四个压力中的一个，并要求麻醉师估计压力是否可接受、过低或过高。然后，要求麻醉师给每个导管的套囊充气。总体而言，103 名（42.9%）麻醉师对气管套囊压力的评估是正确的（如果只是随机猜测，正确的比例应该是 33%，p = 0.002）。麻醉师充气气管套囊时产生的压力变化很大。每个飞行员气球产生的压力中位数（IQR [范围]；9-140cmH2O）范围为 29（17-43 [9-56]）cmH2O 至 74（49-114 [4-140]）cmH2O（p < 0.001）。飞行员气球的设计显著影响麻醉师将气管套囊充气至安全压力的能力。
