Objective To research the anticoagulants in protecting the portal vein obstruction after splenectomy due to the portal hypertension of hepatic cirrhosis.

Objective to analyze the relevant factors and explore methods for prevention of portal vein thrombosis in patients after splenectomy for portal hypertension due to cirrhosis resulting from hepatitis.

The increasing level of D-dimer, INR, diameter of portal vein and thickness of spleen are risk factors of none iver cirrhosis patients.