title: Liver graft-to-recipient spleen size ratio as a novel predictor of portal hyperperfusion syndrome in living donor liver transplantation.
abstract: Portal hyperperfusion in a small-size liver graft is one cause of posttransplant graft dysfunction. We retrospectively analyzed the potential risk factors predicting the development of portal hyperperfusion in 43 adult living donor liver transplantation recipients. The following were evaluated: age, body weight, native liver disease, spleen size, graft size, graft-to-recipient weight ratio (GRWR), total portal flow, recipient portal venous flow per 100 g graft weight (RPVF), graft-to-recipient spleen size ratio (GRSSR) and portosystemic shunting. Spleen size was directly proportional to the total portal flow (p = 0.001) and RPVF (p = 0.014). Graft hyperperfusion (RPVF flow > 250 mL/min/100 g graft) was seen in eight recipients. If the GRSSR was < 0.6, 5 of 11 cases were found to have graft hyperperfusion (p = 0.017). The presence of portosystemic shunting was significant in decreasing excessive RPVF (p = 0.059). A decrease in portal flow in the hyperperfused grafts was achieved by intraoperative splenic artery ligation or splenectomy. Spleen size is a major factor contributing to portal flow after transplant. The GRSSR is associated with posttransplant graft hyperperfusion at a ratio of < 0.6.
authors.affiliation: Liver Transplantation Program and Department of Diagnostic Radiology, Chang Gung University College of Medicine, Kaohsiung 83305, Taiwan.
authors.forename: Y F
authors.initials: YF
authors.lastname: Cheng
authors.forename: T L
authors.initials: TL
authors.lastname: Huang
authors.forename: T Y
authors.initials: TY
authors.lastname: Chen
authors.forename: A
authors.initials: A
authors.lastname: Concejero
authors.forename: L L C
authors.initials: LL
authors.lastname: Tsang
authors.forename: C C
authors.initials: CC
authors.lastname: Wang
authors.forename: S H
authors.initials: SH
authors.lastname: Wang
authors.forename: C K
authors.initials: CK
authors.lastname: Sun
authors.forename: C C
authors.initials: CC
authors.lastname: Lin
authors.forename: Y W
authors.initials: YW
authors.lastname: Liu
authors.forename: C H
authors.initials: CH
authors.lastname: Yang
authors.forename: C C
authors.initials: CC
authors.lastname: Yong
authors.forename: S Y
authors.initials: SY
authors.lastname: Ou
authors.forename: C Y
authors.initials: CY
authors.lastname: Yu
authors.forename: K W
authors.initials: KW
authors.lastname: Chiu
authors.forename: B
authors.initials: B
authors.lastname: Jawan
authors.forename: H L
authors.initials: HL
authors.lastname: Eng
authors.forename: C L
authors.initials: CL
authors.lastname: Chen
mesh_terms: D000293:Adolescent; D000328:Adult; D001835:Body Weight; D005260:Female; D006801:Humans; D016031:Liver Transplantation / Q000009:adverse effects*; D019520:Living Donors; D008297:Male; D008875:Middle Aged; D009929:Organ Size; D011168:Portal System / Q000503:physiopathology*; D011170:Portasystemic Shunt, Surgical; D011183:Postoperative Complications / Q000503:physiopathology*; D011237:Predictive Value of Tests; D013154:Spleen / Q000033:anatomy & histology*