Effects of different stent configurations on shunt failure and hepatic encephalopathy after transjugular intrahepatic portosystemic shunt / 中华消化杂志

ABSTRACT

Objective To compare the effects of different stent configurations on shunt failure,hepatic encephalopathy,and hepatic myelopathy after transjugular intrahepatic portosystemic shunt (TIPS).Methods From March 2014 to June 2015,the clinical data of 73 hospitalized,patients who met the inclusion and exclusion criteria,and underwent TIPS for upper gastrointestinal hemorrhage caused by cirrhotic portal hypertension were retrospectively analyzed.According to the stent configuration during operation,patients were divided into simple coated stent group (hepatic vein,portal vein and hepatic parenchyma coated stent,23 cases),simulated Viatorr stent group (hepatic vein and hepatic parenchyma coated stent plus portal vein bare stent,27 cases) and combined stent group (hepatic vein and portal vein hare stent plus hepatic parenchyma coated stent,23 cases).Patients were followed up for one year,the incidences of shunt failure,hepatic encephalopathy and hepatic myelopathy within one year after TIPS of three groups were compared.Chi-square test,Fisher exact probability method and variance analysis were performed for comparison among groups.Cox regression analysis was used for difference analysis in imbalance of variables and incidence of outcome events among the three groups.Results The portal vein pressure gradient of simple coated stent group,simulated Viatorr stent group and combined stent group decreased from (22.15±4.52),(23.01±5.48) and (21.13±4.49) mmHg (1 mmHg=0.133 kPa) to (9.15±2.94),(11.20±3.27) and (8.75+4.06) mmHg after operation,respectively.Before and after operation,the differences in portal venous pressure gradient were statistically significant of three groups (t=10.488,7.188 and 7.850,all P＜0.05).The shunt failure rates of simple coated stent group,simulated Viatorr stent group and combined stent group were 13.0％ (3/23),18.5％ (5/27) and 30.4％ (7/23),respectively.The results of Cox regression analysis indicated that there was no statistically significant difference in shunt failure rates among different stent configurations after TIPS (P=0.339).The incidences of hepatic encephalopathy of simple coated stent group,simulated Viatorr stent group and combined stent group postoperative were 69.6％ (16/23),33.3％ (9/27) and 30.4％ (7/23),respectively,the difference was not statistically significant among the three groups (P＞ 0.05).The results of Cox regression analysis showed that the relative ratio values (95％ confidence interval) of incidence of postoperative hepatic encephalopathy of simple coated stent group compared with simulated Viatorr stent group and combined stent group were 2.901 (1.279 to 6.584) and 2.735 (1.123 to 6.658),and the differences were statistically significant (both P＜0.05).The incidences of hepatic myelopathy of simple coated stent group,simulated Viatorr stent group and combined stent group were 8.7％ (2/23),3.7％ (1/27) and 4.3％ (1/23),respectively,and there was no statistically significant difference in the incidence of hepatic myelopathy among three groups after operation (P＞0.05).During one-year follow-up,among 73 patients,two patients died,one in simple coated stent group and the other in combined stent group.The one-year survival rate after TIPS was 97.3％.Conclusions One year after operation,the incidences of shunt failure are similar between simple coated stent group,simulated Viatorr stent group and combined stent group.One year after operation,the incidence of hepatic encephalopathy is similar between simulated Viatorr stent group and combined stent group which are both lower than that of simple coated stent.The incidence of hepatic myelopathy is low,and its association with TIPS remains to be further investigated.