What are the recommended steps for managing Budd‑Chiari syndrome?

Management of Budd-Chiari Syndrome: DIPS (Direct Intrahepatic Portosystemic Shunt)

DIPS is a specialized variant of TIPS performed when all hepatic veins are completely occluded, requiring a transcaval approach in more than 45% of Budd-Chiari cases, and achieves clinical outcomes similar to classical TIPS with symptom resolution exceeding 70% and 5-year survival rates exceeding 70%. 1, 2

When DIPS is Indicated

DIPS becomes necessary when complete thrombosis of all hepatic veins prevents the standard transjugular approach to TIPS creation. 1 This technical challenge occurs frequently in Budd-Chiari syndrome because:

• Complete hepatic vein obliteration is present in over 45% of cases requiring portosystemic shunting 1
• Standard TIPS requires catheterization of at least one patent hepatic vein, which is impossible when all are thrombosed 2
• The transcaval approach directly punctures from the IVC into an intrahepatic portal vein branch, bypassing the need for hepatic vein access 2

Stepwise Algorithm Leading to DIPS

Step 1: Immediate Medical Management

• Start anticoagulation immediately upon diagnosis with low-molecular-weight heparin for 5-7 days, overlapped with warfarin targeting INR 2.0-3.0, and continue indefinitely. 3, 1
• Treat underlying prothrombotic conditions: hydroxyurea or interferon-α for myeloproliferative neoplasms; maintain hematocrit <45% in polycythemia vera 1
• Manage portal hypertension complications (ascites, varices) following cirrhosis guidelines 3, 2

Step 2: Angioplasty/Stenting (if anatomically feasible)

• Attempt angioplasty with stenting first for short, focal hepatic vein or IVC stenoses present in 60% of IVC obstruction cases and 25-30% of hepatic vein obstruction cases. 1, 2
• This step is skipped when complete hepatic vein thrombosis is present 1

Step 3: TIPS or DIPS

TIPS/DIPS is indicated when: 3, 1, 2

• Medical therapy fails to control symptoms or liver deterioration
• Angioplasty/stenting is ineffective or technically impossible
• Fulminant Budd-Chiari syndrome develops
• Recurrent variceal bleeding persists despite optimal medical and endoscopic therapy

Technical execution of DIPS: 1, 2

• Requires specialized interventional radiology expertise in centers with formal liver transplant links 1, 2
• Uses PTFE-covered stents exclusively for superior primary patency 1, 2
• Transcaval puncture technique directly connects IVC to intrahepatic portal vein 2
• Can be successfully performed in approximately 95% of patients even with complete hepatic vein obliteration 4

Step 4: Liver Transplantation

• Reserved as salvage therapy for patients who fail DIPS/TIPS, have BCS-TIPS score >7, or present with fulminant hepatic failure unresponsive to shunting. 1, 2

DIPS Outcomes and Monitoring

Clinical outcomes: 1, 2

• Symptom resolution exceeds 70%
• 5-year survival exceeds 70%
• OLT-free survival: 88% at 1 year, 78% at 5 years
• Hepatic encephalopathy risk approximately 15%

Post-procedure surveillance: 1, 2

• Perform Doppler ultrasound immediately post-procedure
• Repeat Doppler ultrasound every 6 months to detect shunt thrombosis or dysfunction
• Continue lifelong anticoagulation (INR 2.0-3.0) after DIPS placement 1, 2

Critical Pitfalls to Avoid

• Do not attempt DIPS without specialized training; the transcaval approach requires expertise available only in high-volume centers. 1, 2
• Never delay anticoagulation while awaiting DIPS; start immediately upon diagnosis even with varices or ascites when adequately managed. 3, 1
• Do not use bare metal stents; PTFE-covered stents are mandatory for optimal patency. 1, 2
• Avoid surgical shunts as first-line therapy; they carry higher morbidity and mortality without survival advantage compared to DIPS/TIPS. 1, 2
• Do not discontinue anticoagulation after successful DIPS; lifelong therapy is required in most patients to prevent recurrent thrombosis. 1, 2

Special Considerations

Pregnancy: 2

• Switch immediately from warfarin to low-molecular-weight heparin with anti-Xa monitoring when pregnancy is confirmed
• Maternal outcomes are excellent with proper anticoagulation, though preterm delivery occurs in 76% of cases
• Warfarin is acceptable during breastfeeding

Concurrent portal vein thrombosis: 1

• Present in approximately 15% of Budd-Chiari cases at presentation
• Significantly worsens prognosis and requires aggressive anticoagulation
• May necessitate combined TIPS-portal vein recanalization (TIPS-PVR) approach 3