Management of Inadvertent CBD Stent Placement in ERCP
Inadvertent stent placement into the portal vein during ERCP requires immediate recognition and urgent multidisciplinary management combining endoscopic and interventional radiology techniques, with stent removal performed under vascular imaging guidance to prevent catastrophic bleeding or portal vein thrombosis.
Immediate Recognition and Assessment
The key to preventing mortality is early recognition. Suspect vascular injury when you observe:
- Intraprocedural bleeding during stent placement
- Persistent hyperbilirubinemia despite apparent stent placement
- Sepsis developing after the procedure
- Abdominal pain worsening post-procedure 1, 2
Obtain immediate contrast-enhanced CT imaging if any of these signs appear post-procedure. The CT will definitively show stent malposition into the portal vein rather than the bile duct 3.
Management Algorithm
Step 1: Stabilize and Prepare
- Resuscitate if bleeding or shock present
- Initiate broad-spectrum antibiotics if sepsis suspected
- Do NOT attempt blind endoscopic removal - this risks uncontrolled hemorrhage 4, 2
Step 2: Multidisciplinary Planning
Coordinate immediately between:
- Advanced endoscopist
- Interventional radiologist
- Vascular/transplant surgeon (especially in post-transplant patients)
Step 3: Stent Removal Strategy
For plastic stents:
- Perform removal in the interventional radiology suite or operating room with portal angiography capability 3
- Establish portal vein access via transjugular route BEFORE stent removal 2
- Remove stent endoscopically under direct portal angiographic visualization
- If bleeding occurs, immediately deploy covered stent graft in portal vein via transjugular access 2
For metal stents (higher risk):
- Larger caliber increases bleeding risk substantially 2
- Mandatory vascular access established first
- Consider prophylactic portal vein stent graft placement before removal 5
Step 4: Fistula Management
After stent removal, the biliovascular fistula requires closure:
- Use hybrid percutaneous-endoscopic rendezvous technique 1
- Place appropriate biliary drainage (plastic or metal stent in actual CBD)
- The fistulous tract typically closes spontaneously with proper biliary drainage 1
In post-transplant patients: Consider direct surgical ligation of the fistula tract between portal vein and CBD, as iatrogenic vascular damage may not heal spontaneously like spontaneous fistulas 4.
Post-Removal Management
- Anticoagulation for portal vein thrombosis prophylaxis (discuss with vascular team)
- Monitor for thrombosis with Doppler ultrasound at 1 week, 1 month, and 3 months 3
- Portal vein thrombosis may occur but often self-resolves 3
- Ensure adequate biliary drainage with properly positioned stent
Critical Pitfalls to Avoid
Never remove the stent endoscopically without vascular backup - this is the most dangerous error. The mortality from uncontrolled portal vein hemorrhage is substantial 4, 2.
Don't assume the stent is correctly positioned based on fluoroscopy alone - portal vein and bile duct can appear similar on fluoroscopy, especially in post-surgical or transplant anatomy 4.
Don't delay imaging if clinical suspicion exists - persistent symptoms after stent placement warrant immediate CT imaging 1, 3.
Don't attempt conservative management - unlike simple portal vein cannulation (which is benign), stent placement creates a persistent fistula requiring active intervention 4, 1.
The evidence consistently demonstrates that this rare but serious complication (occurring in post-transplant patients and those with altered anatomy) requires aggressive, coordinated intervention rather than observation 4, 1, 2, 3. The hybrid approach combining interventional radiology vascular control with endoscopic techniques has proven most effective in recent case series 1, 2, 3.