Seventy-one patients (92.0%) were successfully examined by the retention enema method, and extrahepatic bile duct obstructive lesions were visualized in 68 patients with the sensitivity of 96%.

• 灌肠成功的患者71例（灌肠成功率92.；0%25），能显示肝外胆管梗组病变68例，显示率为96