胸外科病人术后常取半卧位，其目的是有利于胸腔内液体或气体排出，促进呼吸循环功能早日恢复，但在临床工作中病人取半卧位时间较长时，由于重力作用，身体常常往下滑行，有的呈平卧位，有的头部枕在靠背架上，因而达不到治疗作用，针对这种情况，结合临床要求，我们研制出半? Thoracic surgery patients often take a semi-supine position, the purpose is to facilitate the discharge of liquid or gas in the chest cavity, promote the early recovery of respiratory and circulatory function, but in the clinical work when the patient takes a longer semi-recumbent time, due to gravity, the body Often sliding down, some are in supine position, and some are pillowed on the backrest frame, thus failing to achieve a therapeutic effect. In view of this situation, combined with clinical requirements, we developed a half?