The aim of the study is to improve the immediate results after reconstructive and restorative operations on the biliary tract by substantiating the management of the perioperative period on the principles of "enhanced recovery after surgery".

A prospective randomized study on the effect of fast-track surgery on the immediate postoperative results after various reconstructive and restorative operations on the bile ducts. In the Department of Surgical Hepatology and Transplantation, a prospective randomized study will include patients (about 50) with planned reconstructive and restorative operations on the bile ducts for malignant and benign diseases of the bile ducts.

Inclusion Criteria:

1. Patients with malignant diseases of the biliary tract (cholangiocarcinoma):

   1.1. tumor resectability 1.2. absence:

   • distant metastases
   • carcinomatosis
   • perforation of the tumor and peritonitis
   • sprouting into adjacent organs and tissues (locally advanced cancer)
   • total adhesion process in the abdominal cavity (after previous operations). 1.3. Planned reconstructive surgery on the biliary tract.

2. Patients with benign biliary tract pathology. 2.1. Planned reconstructive or restorative surgery on the biliary tract for the following diseases:

   • choledocholithiasis
   • Mirizzi syndrome
   • cysts of the common bile duct
   • strictures of the common bile duct
   • injuries to the bile ducts
   • adenoma and stricture of the OBD

Exclusion Criteria:

1. Scale ASA> III (severe concomitant cardiovascular pathology).
2. Palliative reconstructive surgery.
3. Previously performed operations on the bile ducts (up to 1 month).
4. Cachexia.