Department of Anesthesiology, E-DA Hospital, I-Shou University, Kaohsiung, Taiwan.
Anaesthesia. 2011 Sep;66(9):791-5. doi: 10.1111/j.1365-2044.2011.06789.x. Epub 2011 Jun 24.
Increased tracheal cuff pressure during mechanical ventilation is associated with reduced mucosal blood flow and ischaemia, as well as postoperative sore throat. We assessed the potential effects of transoesophageal echocardiography probe insertion on the tracheal cuff pressure in patients undergoing cardiac surgery. Using a manometer, the cuff pressure of a high-volume, low-pressure tracheal tube (inner diameter 7.0 mm for women and 7.5 mm for men) was adjusted to 25-30 cm H(2)O before blind insertion of a transoesophageal echocardiography probe. The pressure changes were then recorded for 1 min. After probe insertion, the mean (SD) intra-cuff pressure increased from 27.7 (1.5) to 36.2 (6.4) cm H(2)O (p < 0.001) and was > 35 cm H(2)0 in 17/38 patients (45%). Our results suggest that transoesophageal echocardiography probe insertion may increase the tracheal cuff pressure more than that is generally recommended and therefore the latter should be routinely monitored under such circumstances.
在机械通气期间增加气管套囊压力与黏膜血流减少和缺血以及术后喉咙痛有关。我们评估了经食管超声心动图探头插入对接受心脏手术的患者气管套囊压力的潜在影响。使用压力计，在盲目插入经食管超声心动图探头之前，将高容量低压力气管导管（女性内径为 7.0 毫米，男性为 7.5 毫米）的套囊压力调节至 25-30 cm H2O。然后记录压力变化 1 分钟。探头插入后，平均（SD）套囊内压从 27.7（1.5）增加至 36.2（6.4）cm H2O（p<0.001），17/38 名患者（45%）的套囊内压>35 cm H20。我们的结果表明，经食管超声心动图探头插入可能会使气管套囊压力增加超过通常推荐的压力，因此在这种情况下应常规监测后者。
