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在高频喷射通气中,PaO_2正常而PaCO_2偏高的现象时有所见。由于高频喷射通气时,病人自发呼吸消失,CO_2潴留可引起呼吸酸中毒,严重的可危及病人的生命。本文提出几种方法,以期解决高频喷射通气中的CO_2潴留。一、CO_2潴留产生的原因在喷射通气中,少量驱动气体可引起大量气体的流动。流动气体量与驱动气体量之比为喷射效率。所以,喷射通气中的喷射效率很高。喷射效率高对通气十分有利。喷射过程可以分为三个阶段:第一阶段,喷管未达到
In high-frequency jet ventilation, PaO 2 is normal while PaCO 2 is elevated. Due to high-frequency jet ventilation, the patient spontaneous breathing disappear, CO_2 retention can cause respiratory acidosis, serious life-threatening patient. In this paper, several methods are proposed in order to solve the CO2 retention in high frequency jet ventilation. First, the causes of CO_2 retention In jet ventilation, a small amount of driving gas can cause a large number of gas flow. The ratio of the amount of flowing gas to the amount of driving gas is the ejection efficiency. Therefore, jetting efficiency in jet ventilation is high. High injection efficiency is very good ventilation. Injection process can be divided into three stages: the first stage, the nozzle is not reached