Bile Duct Injury Classification and Management

Classification Systems

• The World Journal of Emergency Surgery recommends the ATOM classification as the most recent and complete system for bile duct injuries, which combines anatomic damage, time of detection, and mechanism of injury 1, 2
• The Bismuth classification (1982) is the first published classification system focused on biliary injury location 2
• The Strasberg classification (1995) is currently the most commonly used classification for bile duct injuries 1
• The Stewart-Way classification (2007) integrates vascular injuries into bile duct injury description 2
• The Lau classification includes vascular injury components 2

Clinical Categorization of Bile Duct Injuries

• Minor bile duct injuries are caused by electrocautery burns or partial cuts from sharp dissection, with no associated tissue loss, and can typically be repaired primarily with sutures and abdominal drain placement 2
• Major bile duct injuries are associated with tissue loss, require complex reconstruction with Roux-en-Y hepaticojejunostomy, and examples include Strasberg type E injuries 2

Specific Classification Details

• The WSES classification system organizes injuries by severity (minor, moderate, severe) and includes pancreatic, duodenal, and extrahepatic biliary tree injuries 3
• The WSES classification system categorizes extrahepatic biliary injuries into minor (Class I), moderate (Class II), and severe (Class III) based on the extent of injury 3

Clinical Implications of Bile Duct Injury Classifications

• Proper classification is essential for choosing the appropriate management strategy, determining the timing of repair and surgical approach, and facilitating communication between healthcare providers 1, 2
• The lack of a "gold standard" classification for bile duct injuries makes direct comparisons between systems difficult and highlights the need for standardization of common nomenclature 2

Management Considerations Based on Classification

• Intraoperative bile duct injuries should be repaired immediately only by experienced biliary surgery specialists 4
• For injuries detected early postoperatively without inflammation, primary repair can be performed 4
• In cases with infection, peritonitis, or vascular injury, delayed repair is recommended after controlling leakage and infection 4, 5
• Definitive repair is typically performed 4-6 weeks after effective control of inflammation 4, 5

Bile Duct Injury Classifications That Include Vascular Components

Major Classification Systems with Vascular Components

• The World Society of Emergency Surgery guidelines recommend the ATOM classification, which is the most recent and complete classification system for bile duct injuries, integrating anatomical damage, time of detection, and mechanism of injury while including vascular involvement through the "VBI+" designation (vasculobiliary injury) 6, 7

Clinical Significance of Vasculobiliary Injuries

• Systematic immediate repair of isolated injuries to the right hepatic artery is not recommended, and the benefit/risk ratio should be carefully evaluated on a case-by-case basis 8
• The repair of complex vasculobiliary injuries should be delayed rather than attempted intraoperatively, even by expert hepatopancreatobiliary (HPB) surgeons 8

WSES Guideline Recommendations

• The World Society of Emergency Surgery guidelines strongly recommend knowing both Strasberg's classification and the ATOM classification, with the ATOM classification being the most recent and complete 6, 7
• The World Society of Emergency Surgery guidelines state that "the implementation of the ATOM classification should be promoted in the near future" due to its comprehensive nature 6, 7
• When describing bile duct injuries, the operative report must include detailed information about anatomical landmarks, variations, and any vascular structures involved 7, 9

Bile Duct Injury Classification and Management

Anatomical Characteristics

• Injuries are first categorized based on whether they involve the main biliary duct (MBD) or non-main biliary duct (NMBD), with main biliary duct injuries further classified by anatomical level (1-6) and described as complete (C) or partial (P), according to the World Society of Emergency Surgery guidelines 10, 11
• Each injury is described as complete (C) or partial (P), with loss of substance (LS) noted when applicable, in the context of bile duct injuries 10, 11
• Vasculobiliary injury (VBI) is documented as present (VBI+) or absent (VBI-), with specific injured vessel noted (RHA, LHA, CHA, PV, MV) 10

Time of Detection and Mechanism of Injury

• Bile duct injuries can be detected at different times, including early intraoperative (Ei), early postoperative (Ep), and late (L), with implications for management 10
• The mechanism of injury can be mechanical (Me) or energy driven (ED), with direct surgical trauma from instruments or thermal injury from electrocautery or other energy devices 10

Clinical Significance and Management

• For minor injuries (partial injuries without tissue loss), direct repair with or without T-tube placement may be considered, according to the World Society of Emergency Surgery guidelines 11
• For major injuries (complete transection or with tissue loss), hepaticojejunostomy is the treatment of choice, with early repair (on-table up to 72h) considered with appropriate surgical expertise 11
• Complex vasculobiliary injuries should be delayed rather than attempted intraoperatively, even by expert HPB surgeons, to ensure optimal outcomes 11

Management of Bile Duct Injury During Laparoscopic Cholecystectomy

Management of Biliary Injury

• Hepaticojejunostomy is the most appropriate next step for managing a divided hepatic duct with clips on the proximal hepatic duct and distal common bile duct, as recommended by the World Journal of Emergency Surgery 12
• The scenario describes a major bile duct injury detected intraoperatively with a divided hepatic duct 13, clips on proximal hepatic duct 14, and clip on distal common bile duct 15, which represents a severe bile duct injury requiring definitive reconstruction
• Major bile duct injuries with tissue loss and transection require Roux-en-Y hepaticojejunostomy as the recommended method of reconstruction, with a success rate of 80-90% when performed by experienced surgeons 12
• End-to-end anastomosis is not recommended for cases with clips on the bile ducts and complete transection due to high risk of stricture formation 16
• The procedure involves removing clips and scar tissue from the proximal bile duct stump and creating an anastomosis between healthy bile duct tissue and a Roux-en-Y jejunal limb 16, 14

Technical Considerations for Hepaticojejunostomy

• The key to successful hepaticojejunostomy is establishing an adequate caliber of anastomosis using a narrow proximal bile duct with normal mucosa 16, 15
• Scar tissue on the stump of the bile duct must be removed after fully exposing the proximal bile duct 16, 17
• For cases where left and right hepatic ducts are cut off, remove scar tissue from bile duct stumps and form an anastomotic stoma by suturing the medial margin of left and right hepatic ducts before performing anastomosis with the jejunum 18, 14
• Use fine suture technique (5-0 or 6-0) according to the thickness of the bile duct wall, with either absorbable or non-absorbable sutures 15, 13
• Principles of single-layer stitching, uniform margins, appropriate density, moderate knotting strength, and tension-free anastomosis should be followed 15, 17

Why Other Options Are Not Appropriate

• End-to-end anastomosis with absorbable suture is not recommended for major bile duct injuries with tissue loss or when clips have been placed on the ducts 12
• Choledochojejunostomy is not appropriate when the injury involves the hepatic duct rather than the distal common bile duct 12
• Whipple procedure would be excessive for an isolated bile duct injury without pancreatic or duodenal involvement 19

Biliary Injury Management

Classification and Management Principles

• Percutaneous drainage is the first-line treatment for symptomatic or infected bilomas, with broad-spectrum antibiotics also recommended 20, 21
• The management approach for bilomas and abscesses includes percutaneous drainage under imaging guidance, broad-spectrum antibiotics, and combined percutaneous drainage and endoscopic stenting for complex cases 20, 21
• Percutaneous lavage/drainage combined with endoscopic stenting is the first-line approach for delayed post-traumatic biliary fistulas without other indications for laparotomy 20, 21

Treatment Outcomes

• Endoscopic management with biliary stenting has a 96% success rate for bile leaks 20, 21
• Percutaneous drainage has a high success rate for intrahepatic bile leaks and bilomas 20, 21