Hepatic Venous Outflow Obstruction in Piggyback Liver Transplantation: Single Centre Experience.

BACKGROUND:Hepatic venous outflow obstruction (HVOO) is a rare but serious complication in liver transplantation (LT).METHODS:We conducted a retrospective analysis of HVOO with venography and gradient measurement in consecutive LT from a single centre.RESULTS:Five hundred and six LTs were performed in 486 patients with a median age of 49 years (range 3 months to 71 years). Nineteen (3.8%) cases of HVOO were identified. Diagnosis was confirmed at a median of 26 days post-LT (1-2312). The incidence fell from 5.5% in the first 253 LT, to 2.0% in the second 253 (P = 0.03). Seventeen were due to narrowing at the anastomosis and two cases were due to thrombosis. In adult patients, reconstruction of the supra-hepatic donor inferior vena cava (IVC) onto two veins versus modified 2-3 hepatic veins did not alter the likelihood of HVOO. 17/19 cases were managed successfully by stenting or venoplasty. Two paediatric patients with early onset HVOO had attempted surgical thrombectomy, one was successful and the other required retransplantation.CONCLUSION:The incidence of HVOO appears to fall with increasing experience and does not appear to be related to the number of veins the donor IVC is anastomosed to in adult recipients.