title: Risk factors for portal vein complications in pediatric living donor liver transplantation.
abstract: BACKGROUND
  Portal vein (PV) complications in pediatric living donor liver transplantation (LDLT) are often asymptomatic in the early stages after transplantation and can be serious enough to lead to graft failure. There have been few reports on risk factors for PV complications in LDLT. The aim of this study is to investigate the influence of hepatic inflow upon PV complications and to predict patients at risk for these complications.
  
  
  METHODS
  From 1997 to 2008, 46 pediatric patients underwent LDLT at our center. Portal venous and hepatic arterial flows and PV diameter were analyzed.
  
  
  RESULTS
  PV complications were identified in seven patients (15.2%) and occurred at a younger age and lower weight. As a result of appropriate treatment, none of the patients suffered graft failure. Analysis of the 46 patients and 27 patients under two yr of age identified smaller PV diameter in recipient and larger discrepancy of PV diameter as risk factors. Portal venous flow tended to be low, in contrast to hepatic arterial flow, which tended to be high.
  
  
  CONCLUSIONS
  PV size strongly influences PV complications. Other factors such as younger age, low portal venous flow, and high hepatic arterial flow may be risk factors for PV complications.
authors.affiliation: Department of General Surgery, Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Shibasaki
authors.forename: Masahiko
authors.initials: M
authors.lastname: Taniguchi
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Shimamura
authors.forename: Tomomi
authors.initials: T
authors.lastname: Suzuki
authors.forename: Kenichiro
authors.initials: K
authors.lastname: Yamashita
authors.forename: Kenji
authors.initials: K
authors.lastname: Wakayama
authors.forename: Gentaro
authors.initials: G
authors.lastname: Hirokata
authors.forename: Minoru
authors.initials: M
authors.lastname: Ohta
authors.forename: Toshiya
authors.initials: T
authors.lastname: Kamiyama
authors.forename: Michiaki
authors.initials: M
authors.lastname: Matsushita
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Furukawa
authors.forename: Satoru
authors.initials: S
authors.lastname: Todo
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D005260:Female; D006084:Graft Rejection / Q000175:diagnosis; D006801:Humans; D017093:Liver Failure / Q000628:therapy*; D016031:Liver Transplantation; D019520:Living Donors; D008297:Male; D008875:Middle Aged; D011169:Portal Vein / Q000473:pathology*; D011183:Postoperative Complications; D011446:Prospective Studies; D012307:Risk Factors; D015996:Survival Rate; D016896:Treatment Outcome; D055815:Young Adult