One possible reason for this may be the complex vascular supply of the extrahepatic bile ducts and the effect of hepatectomy and transection of the bile ducts on the blood supply of the bile duct.

• 造成这种现象的原因可能是肝外胆道复杂的血管供应以及肝切除术和胆道切面对胆管供血量的影响。