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Three-Dimensional Portal Vein Geometry Predicts Post-TIPS -Hepatic Encephalopathy and Variceal Rebleeding: A
Shang Wan1, Jianyu Li2,3, Xiao Zhang4
1Department of Radiology, West China Hospital, Sichuan University, Chengdu, China.
Summary
Three-dimensional portal venous geometry (3D-PVG) predicts post-transjugular intrahepatic portosystemic shunt (TIPS) complications. Integrating 3D-PVG with clinical data significantly improves risk prediction for overt hepatic encephalopathy and variceal rebleeding.
Area of Science:
- Radiology and Medical Imaging
- Hepatology
- Vascular Surgery
Background:
- Post-transjugular intrahepatic portosystemic shunt (TIPS) overt hepatic encephalopathy (OHE) and variceal rebleeding (VRB) are significant complications.
- Current predictive tools for these complications are limited.
- Preoperative three-dimensional portal venous geometry (3D-PVG) is a potential prognostic biomarker.
Purpose of the Study:
- To investigate if preoperative 3D-PVG is an independent prognostic biomarker for 1-year OHE and VRB after TIPS.
- To assess the predictive performance of integrated clinical-geometric models (3D-CGM) compared to clinical models.
Main Methods:
- A multicenter retrospective study of 579 cirrhotic patients undergoing successful TIPS.
- Extraction of 3D-PVG features (bifurcation angles and vessel tortuosity) from preoperative CT angiography.
- Cox regression analysis for OHE and VRB prediction; model performance evaluated using Harrell's C-index.
Main Results:
- Independent risk factors for 1-year OHE included older age, higher BUN, and extremely flat portal vein bifurcations.
- Risk factors for 1-year VRB included prior bleeding, elevated creatinine, flat bifurcations, and straight vessel segments; covered stents and curved segments were protective.
- The 3D-CGM significantly improved predictive performance for OHE (C-index 0.801) and VRB (C-index 0.792) compared to clinical models (0.715 and 0.686).
Conclusions:
- Inherent portal venous geometry is an independent imaging biomarker for post-TIPS outcomes.
- The 3D-CGM enhances risk prediction for OHE and VRB.
- This approach offers a non-invasive method for prognosis assessment in portal hypertension.
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