Rioux M
Department of Radiology, Hôpital Saint-François d'Assise, Québec, Canada.
AJR Am J Roentgenol. 1992 Apr;158(4):773-8. doi: 10.2214/ajr.158.4.1546592.
A prospective study of 170 patients with suspected appendicitis was performed to assess the value of sonography in detecting the normal and abnormal appendix. The wall thickness (normal, less than or equal to 3 mm), compressibility of the appendix, and echogenicity of surrounding fat were the primary criteria used to determine the status of the appendix. Of 60 patients who underwent surgery, appendicitis was proved in 45. The remaining 110 patients who did not have surgery, contacted by telephone at the end of the study, had no clinical follow-up evidence of acute appendicitis. A normal appendix was clearly identified in 102 (82%) of 125 patients without acute appendicitis. The sensitivity of sonographic examination in detecting appendicitis was 93%, the specificity was 94%, and the accuracy was 94%. The predictive value of a positive test was 86%; that of a negative test was 98%. Ruptured appendicitis was predicted in all cases (11/11). Sonography is useful in detecting acute appendicitis and can clearly show the normal appendix more frequently than previously reported.
对170例疑似阑尾炎患者进行了一项前瞻性研究，以评估超声检查在检测正常和异常阑尾方面的价值。阑尾壁厚度（正常情况下，小于或等于3毫米）、阑尾的可压缩性以及周围脂肪的回声是用于确定阑尾状态的主要标准。在接受手术的60例患者中，45例被证实患有阑尾炎。其余110例未接受手术的患者在研究结束时通过电话联系，没有急性阑尾炎的临床随访证据。在125例无急性阑尾炎的患者中，102例（82%）阑尾被清晰识别。超声检查检测阑尾炎的敏感性为93%，特异性为94%，准确性为94%。阳性检查的预测值为86%；阴性检查的预测值为98%。所有病例（11/11）均预测为阑尾破裂。超声检查在检测急性阑尾炎方面很有用，并且比以前报道的更能频繁清晰地显示正常阑尾。
