title: Validation of graft and standard liver size predictions in right liver living donor liver transplantation.
abstract: OBJECTIVE
  To assess the accuracy of a formula derived from 159 living liver donors to estimate the liver size of a normal subject: standard liver weight (g) = 218 + body weight (kg) × 12.3 + 51 (if male). Standard liver volume (SLV) is attained by a conversion factor of 1.19 mL/g.
  
  
  METHODS
  The total liver volume (TLV) of each of the subsequent consecutive 126 living liver donors was determined using the right liver graft weight (RGW) on the back table, right/left liver volume ratio on computed tomography, and the conversion factor. The estimated right liver graft weight (ERGW) was determined by the right liver volume on computed tomography (CT) and the conversion factor. SLV and ERGW were compared with TLV and RGW, respectively, by paired samplettest.
  
  
  RESULTS
  Donor characteristics of both series were similar. SLV and TLV were 1,099.6 ± 139.6 and 1,108.5 ± 175.2 mL, respectively, (R2= 0.476) (p= 0.435). The difference between SLV and TLV was only -8.9 ± 128.2 mL (-1.0 ± 11.7%). ERGW and RGW were 601.5 ± 104.1 and 597.1 ± 102.2 g, respectively (R2= 0.781) (p= 0.332). The conversion factor from liver weight to volume for this series was 1.20 mL/g. The difference between ERGW and RGW was 4.3 ± 49.8 g (0.3 ± 8.8%). ERGW was smaller than RGW for over 10% (range 0.21-40.66 g) in 18 of the 126 donors. None had the underestimation of RGW by over 20%.
  
  
  CONCLUSIONS
  SLV and graft weight estimations were accurate using the formula and conversion factor.
authors.affiliation: Department of Surgery, The University of Hong Kong, 102 Pokfulam Road, Hong Kong, China ; State Key Laboratory for Liver Research, The University of Hong Kong, 102 Pokfulam Road, Hong Kong, China.
authors.forename: See Ching
authors.initials: SC
authors.lastname: Chan
authors.affiliation: Department of Surgery, The University of Hong Kong, 102 Pokfulam Road, Hong Kong, China ; State Key Laboratory for Liver Research, The University of Hong Kong, 102 Pokfulam Road, Hong Kong, China.
authors.forename: Chung Mau
authors.initials: CM
authors.lastname: Lo
authors.affiliation: Department of Surgery, The University of Hong Kong, 102 Pokfulam Road, Hong Kong, China.
authors.forename: Kenneth S H
authors.initials: KS
authors.lastname: Chok
authors.affiliation: Department of Surgery, The University of Hong Kong, 102 Pokfulam Road, Hong Kong, China.
authors.forename: William W
authors.initials: WW
authors.lastname: Sharr
authors.affiliation: Department of Surgery, The University of Hong Kong, 102 Pokfulam Road, Hong Kong, China.
authors.forename: Tan To
authors.initials: TT
authors.lastname: Cheung
authors.affiliation: Department of Surgery, The University of Hong Kong, 102 Pokfulam Road, Hong Kong, China.
authors.forename: Simon H Y
authors.initials: SH
authors.lastname: Tsang
authors.affiliation: Department of Surgery, The University of Hong Kong, 102 Pokfulam Road, Hong Kong, China.
authors.forename: Albert C Y
authors.initials: AC
authors.lastname: Chan
authors.affiliation: Department of Surgery, The University of Hong Kong, 102 Pokfulam Road, Hong Kong, China ; State Key Laboratory for Liver Research, The University of Hong Kong, 102 Pokfulam Road, Hong Kong, China.
authors.forename: Sheung Tat
authors.initials: ST
authors.lastname: Fan