Morris R, Macken L, Tall G
Department of Trauma, St George Hospital, Sydney, N.S.W.
Anaesth Intensive Care. 1999 Aug;27(4):400-4.
We describe three cases in which there was failure of exhalation during mechanical ventilation with the Dräger Oxylog 2000 ventilator. Two potential mechanisms for this failure were identified, and were then experimentally reproduced on a test lung. First, a manufacturing fault in the silicone diaphragm in the ventilation valve was discovered. When a small hole in the diaphragm was incompletely perforated, a possible flap valve was formed, limiting exhalation. Second, failure of the one-way rubber disc valve to seat properly in its housing also prevented exhalation. These two previously unreported modes of ventilator failure have been identified. Careful checking of the ventilator circuit before each use is required.
我们描述了三例在使用德尔格Oxylog 2000呼吸机进行机械通气时呼气失败的病例。确定了导致这种失败的两种潜在机制，然后在测试肺上进行了实验重现。首先，发现通气阀中的硅胶隔膜存在制造缺陷。当隔膜上的一个小孔未完全穿孔时，可能会形成一个瓣阀，限制呼气。其次，单向橡胶盘阀在其外壳中未正确就位也会阻止呼气。已经确定了这两种以前未报告的呼吸机故障模式。每次使用前都需要仔细检查呼吸机回路。
