Estimating liver weight of adults by body weight and gender.
OBJECTIVE
To estimate the standard liver weight for assessing adequacies of graft size in live donor liver transplantation and remnant liver in major hepatectomy for cancer.


METHODS
In this study, anthropometric data of body weight and body height were tested for a correlation with liver weight in 159 live liver donors who underwent donor right hepatectomy including the middle hepatic vein. Liver weights were calculated from the right lobe graft weight obtained at the back table, divided by the proportion of the right lobe on the computed tomography.


RESULTS
The subjects, all Chinese, had a mean age of 35.8+/-10.5 years, and a female to male ratio of 118:41. The mean volume of the right lobe was 710.14+/-131.46 mL and occupied 64.55%+/-4.47% of the whole liver on computed tomography. Right lobe weighed 598.90+/-117.39 g and the estimated liver weight was 927.54+/-168.78 g. When body weight and body height were subjected to multiple stepwise linear regression analysis, body height was found to be insignificant. Females of the same body weight had a slightly lower liver weight. A formula based on body weight and gender was derived: Estimated standard liver weight (g) = 218 + BW (kg) x 12.3 + gender x 51 (R2 = 0.48) (female = 0, male = 1). Based on the anthropometric data of these 159 subjects, liver weights were calculated using previously published formulae derived from studies on Caucasian, Japanese, Korean, and Chinese. All formulae overestimated liver weights compared to this formula. The Japanese formula overestimated the estimated standard liver weight (ESLW) for adults less than 60 kg.


CONCLUSIONS
A formula applicable to Chinese males and females is available. A formula for individual races appears necessary.
Chan
See Ching
SC
Centre for the Study of Liver Disease, Department of Surgery, The University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, China.
Liu
Chi Leung
CL
Lo
Chung Mau
CM
Lam
Banny K
BK
Lee
Evelyn W
EW
Wong
Yik
Y
Fan
Sheung Tat
ST
D000328:Adult; D001827:Body Height; D001830:Body Surface Area; D001835:Body Weight; D005260:Female; D006801:Humans; D008099:Liver / Q000033:anatomy & histology*; D008297:Male; D008875:Middle Aged; D009929:Organ Size; D012044:Regression Analysis; D012737:Sex Factors; D014057:Tomography, X-Ray Computed