Drainage is usually carried out after biliary tract surgery.

通常在胆道手术后进行引流。

Most often this is due to extrahepatic biliary tract obstruction.

这通常由肝外胆道阻塞所引起。

Objective:To study cystectomy and modified biliary tract rebuilding operation.

目的：探讨胆总管囊肿切除后改良胆道重建术。

Infection and obstruction of the biliary tract are causes of pigment stone formation.

胆道梗阻和感染是胆色素结石形成的重要原因。

Methods: MRVE was performed in 47 patients with obstructive diseases of biliary tract.

方法：47例胆系梗阻性病变的患者行MRVE检查。