我国目前各医院所使用的人工心肺机大部分为上海Ⅱ型。因没有血液变温部分,对实行深低温手术有一定困难。以后,生产了改良Ⅱ型(Ⅱ型-B)在氧合槽底部装上夹层作为升降温之用。虽然较前有了改进,但升降温的效果不好,不能满足临床深低温手术的要求。近几年来体外循环手术已广泛开展,心内复杂手术越来越多。对深低温和心肌保护要求越来越高。所以迫切需要生产一批性能较好的血液变温器,以适应体外循环加深低温手术的需要。虽然国外文献报告变温器 At present, most of the artificial heart-lung machines used in various hospitals in our country are Type II in Shanghai. Because there is no blood temperature part of the implementation of cryogenic surgery have some difficulties. Later, a modified Type II (Type II-B) was produced with a sandwich at the bottom of the oxygenation tank for temperature rise and cooling. Although earlier improvements, but the cooling effect is not good, can not meet the requirements of clinical cryogenic surgery. In recent years, cardiopulmonary bypass surgery has been widely carried out, more and more complex intracardiac surgery. Deep hypothermia and myocardial protection requirements are getting higher and higher. Therefore, there is an urgent need to produce a group of better performance blood warmer to adapt to the needs of extracorporeal circulation to deepen cryogenic surgery. Although foreign literature reports warmers