目的 探讨超声内镜检查对腹腔镜胆囊切除病人手术前可疑胆总管结石的诊断价值。 方法 2004年1月至2007年7月中山大学附属第一医院对100例术前B超检查可疑胆总管结石的病人行超声内镜检查，对其结果进行分析。 结果 超声内镜检查成功率100%，发现胆总管结石54例，超声内镜对病人胆总管结石的敏感度、特异度、准确率、阳性预测值和阴性预测值分别为96.30%，97.83%，97.00%，98.11%，95.74%。 结论 腹腔镜胆囊切除术前对胆总管可疑结石的病人行超声内镜检查，有助于减少胆囊切除后胆总管残余结石的发生率。

Value of endoscopic ultrasonography to prevent retained calculus in common bile duct post-laparoscopic cholecystectomy CHEN Liu-hua*, WU Zhi-mian, ZHENG Chao-xu, et al. *Department of Minimal Invasive Surgery, the First Affiliated Hospital of SUN Yat-sen University, Guangzhou 510080, China Corresponding author：CHEN Liu-hua, E-mail：chlh22@163.com Abstract Objective To evaluate the rate of final diagnosis of common bile duct (CBD) stones pre-laparoscopic cholecystectomy (LC) and to decrease retained calculus in CBD post-LC. Methods From January 2004 to July 2007, 100 symptomatic gallstones patients performed endoscopic ultrasonography (EUS) for suspected choledocholithiasis pre-LC at the First Affiliated Hospital of Sun Yat-sen University. The EUS results were analyzed. Results The successful rate of EUS were 100%. Occult CBDS were found in 54 patients . The sensitivities, specificities, accuracies, positive and negative predictive values for occult CBDS by EUS were 96.30%，97.83%，97.00%，98.11% and 95.74%. Conclusion EUS is necessary for patients to decrease the rate of retained calculus in CBD post-LC.