Department of Anesthesia and Intensive Care Medicine, Medical University Innsbruck, Austria.
Anaesthesia. 2012 Apr;67(4):407-10. doi: 10.1111/j.1365-2044.2011.07024.x. Epub 2012 Feb 11.
The i-gel™ and LMA Supreme™ are extraglottic airway devices with non-inflatable and inflatable cuffs, respectively. We hypothesised that directly measured mucosal pressures would differ between these devices in anesthetised paralysed patients. Thirty patients were randomly allocated to receive one of these two devices. Four pressure sensors were attached to all airway devices used to measure mucosal pressure at the base of the tongue, the distal oropharynx, the hypopharynx and the pyriform fossa. At these four places, median (IQR [range]) i-gel mucosal pressures were 8.0 (2.7-10.7 [0-26.7]), 5.0 (2.7-7 [1.0-37.3]), 9.3 (2.7-13.3 [0-22.7] and 8.0 (2.7-10.7 [0-25.3]) cmH(2)O, respectively, and for the LMA Supreme, these were 5.0 (0.5-8.0 [0-33]), 4.0 (1.3-9.3 [0-24]), 10.7 (4-17.3 [0-26.7]) and 8.0 (0-10.7 [0-36]) cmH(2)O, respectively. Mucosal pressures were low and similar for both devices. The LMA Supreme mucosal pressures were higher in the hypopharynx than in the distal oropharynx (p = 0.04) and base of the tongue (p = 0.011). There were no pressure differences between the locations for the i-gel.
i-gel™ 和 LMA Supreme™ 是两种不同类型的声门外气道装置，分别带有不可充气和可充气套囊。我们假设在麻醉且肌松的患者中，这两种装置的直接测量黏膜压力会有所不同。将 30 例患者随机分为两组，分别使用这两种装置中的一种。所有气道装置上均附有 4 个压力传感器，用于测量舌根、远口咽、下咽和梨状窝处的黏膜压力。这四个部位 i-gel 的黏膜压力中位数（IQR [范围]）分别为 8.0（2.7-10.7 [0-26.7]）、5.0（2.7-7 [1.0-37.3]）、9.3（2.7-13.3 [0-22.7]）和 8.0（2.7-10.7 [0-25.3]）cmH2O，LMA Supreme 的相应值分别为 5.0（0.5-8.0 [0-33]）、4.0（1.3-9.3 [0-24]）、10.7（4-17.3 [0-26.7]）和 8.0（0-10.7 [0-36]）cmH2O。两种装置的黏膜压力均较低且相似。LMA Supreme 在下咽处的黏膜压力高于远口咽（p = 0.04）和舌根处（p = 0.011）。i-gel 在各个部位的黏膜压力无差异。
