The sensitivity of detection of free air and free or stomachic and intestinal perforation fluid in abdomen by sonography were 91.6% (33/36),100% (36/36) respectively. The presence of irregular shaped inflammation mass was 55.6% (20/36).

• 超声发现腹腔游离气体和 (或 )游离包裹性积液 ；敏感性较高 ；分别为 91.；6%25( 33/36 )和 10 0%25( 36 /36 )；腹腔内不规则炎性包块占 5 5