Long-term efficacy and risk factors for stent occlusion in portal vein stent placement: a multi-institutional retrospective study.

PV stent placement was technically feasible and effective in improving portal hypertension. However, stent occlusion was not uncommon. Residual stenosis > 30% after stent placement was significantly associated with stent occlusion. We should pay attention to correctly assess the range of stenosis and release the stenosis as much as possible.