高频超声对急性阑尾炎的诊断价值

目的为探讨高频超声对急性阑尾炎的诊断价值。方法回顾性分析101例经手术和（或）病理证实的急性阑尾炎。结果其声像图表现：①直接征象：阑尾不同程度肿大，阑尾纵切面显示为数厘米长的腊肠样、管状、手指状或蚯蚓状的低回声或无回声区，不均质。横断面呈“靶环征”或圆形回声；②间接征象：阑尾内粪石并声影；阑尾炎有渗出或穿孔时周围的无回声区或有沉积物回声；脓肿形成时为右下腹混合性肿块回声；肠管扩张（特别是升结肠扩张）；回盲部肠管局限性水肿或肠系膜增厚和大网膜包裹。结论超声检查简便、可重复性对急性阑尾炎诊断有很大的实用价值，应列为首选的影像检查方法。

The clinical value of high frequency ultrasound diagnosis in acute appendicitis

Objective To probe the value of high frequency ultrasound in diagnosing acute appendicitis. Methods 101 proved acute appendicitis cases were retrospectively studied to estimate the diagnostic value of sonography. Results The direct sign of acute appendicitis is appendicular swelling. Ultrasonography shows low or absence echo on longitudinal section of appendix like sausage, tube, finger or earthworn The cross section of appendix shows target-like or disk-like echo. The indirect sign includes the stercolith in the appendix with sound shadow;periappendicular absence echo or deposit echo when appendicitis complicated with exudation or perforation;mixed swollen echo on the right hypogastric region when abscess formated;dilation of intestine (as-ceuding colon especially) ;local ileocecal edema or mesenteric thickening and encysted greater omentum. Conclusion It suggested that simple and repetitive ultrasonography have great applicable value on diagnosing appendicitis. It is concluded that ultrasonography is the imaging method of choice for diagnosing acute appendicitis.