Hensler T, Dhamee M S
Medical College of Wisconsin, Milwaukee 53226.
J Clin Monit. 1990 Apr;6(2):128-31. doi: 10.1007/BF02828289.
We present a case in which a dip in the capnogram of an anesthetized patient, which may indicate clinical complications such as spontaneous respiratory effort, was caused by a malfunction of the anesthesia delivery system. The rubber diaphragm of the ventilator relief valve was found to be coated with a sticky substance which may have caused adhesion at the valve seat. This adhesion blocked the flow of excess gas to the scavenging system during exhalation. It was demonstrated that a pressure of 5 cm H2O was needed to overcome this adhesion.
我们报告了一例麻醉患者的二氧化碳波形图出现下降的情况，该下降可能表明存在诸如自主呼吸努力等临床并发症，而实际上是由麻醉输送系统故障所致。发现呼吸机安全阀的橡胶隔膜上覆盖有粘性物质，这可能导致隔膜与阀座粘连。这种粘连在呼气时阻碍了多余气体流向清除系统。结果表明，需要5厘米水柱的压力才能克服这种粘连。
