New strategies for prevention and treatment of splenic artery steal syndrome after liver transplantation

AIM:To explore a prophylactic procedure to prevent splenic artery steal syndrome(SASS),as well as a therapeutic intervention to correct it.METHODS:Forty-three liver transplant patients were enrolled in a non-randomized controlled trial,with the eligible criterion that the diameter of the splenic artery is more than 5 mm and/or 1.5 times of the diameter of the hepatic artery.The procedure of splenic artery banding was performed in 28 of the 43 patients,with the other 15 patients studied as a control group.SASS and other complications were compared between these two groups.A new therapeutic intervention,temporary incomplete blockade of the splenic artery with a balloon,was performed to treat SASS in this study.RESULTS:The incidence of SASS was decreased by banding the splenic artery(0/28 vs 5/15,P = 0.006),and the same result was observed in total complications associated with prophylactic procedures(2/28 vs 6/15,P = 0.014).Five patients in the control group developed SASS within 5 d after OLT,2 of whom were treated by coil embolization of the splenic artery,whereas the other 3 by temporary blockade of the splenic artery.Reappeared or better hepatic arteries with improved systolic amplitude and increased diastolic flow were detected by Doppler ultrasonography in all the 5 patients.Local splenic ischemic necrosis and nonanastomotic biliary stricture were diagnosed respectively in one patient treated by coil embolization,and no collateral complication was detected in patients treated by temporary blockade of the splenic artery.CONCLUSION:SASS should be avoided during the operation by banding the splenic artery.Temporary blockade of the splenic artery is a new safe and effective intervention for SASS.