在活器官内的空气积留现象常常具有病理意义 ,气腹症即为一例。正常条件下 ,腹腔中仅在胃肠道内存有空气 ,而将在胃肠道外存在自由空气的异常状态称作气腹。气腹一般是由胃肠穿孔引起的。在行胃肠穿孔的紧急手术前检查气腹症状是重要的 ,目前通用的方法是 X线摄像或 CT等成像方 Accumulation of air in living organs often has pathological significance, pneumoconiosis is one example. Under normal conditions, there is only air in the abdominal cavity in the gastrointestinal tract, while the abnormal state of free air outside the gastrointestinal tract is called pneumoperitoneum. Pneumoperitoneum is usually caused by gastrointestinal perforation. Gastrointestinal perforation in the line of emergency surgery before the inspection of pneumoperitoneum symptoms is important, the current common method is X-ray imaging or CT and other imaging side