Wawersik J
Anaesthesist. 1976 Nov;25(11):537-40.
In order to remove exhaled vapours from T-piece circuits, a rebreathing bag with an additional outlet (double ended bag) may be used. The narrow end of the bag is connected to a circle closed circuit with a filter incorporated in the expiratory side. So T-piece technique remains convenient. A small increase of expiratory resistance of about 1.5-2.5 ml H2O does not change spontaneous ventilation, compared with commonly used semi-closed breathing circuits in pediatric anaesthesia. Assisted or controlled ventilation may be performed, adjusting the expiratory valve at the circle closed system.
为了从T形管回路中去除呼出的蒸汽，可以使用带有额外出口的再呼吸袋（双头袋）。袋子的窄端连接到一个循环闭合回路，呼气侧装有过滤器。因此，T形管技术仍然很方便。与儿科麻醉中常用的半闭合呼吸回路相比，呼气阻力小幅增加约1.5 - 2.5 ml H2O不会改变自主通气。可以通过调节循环闭合系统的呼气阀来进行辅助通气或控制通气。
