PREOPERATIVE MEASUREMENT OF SEGMENTAL LIVER VOLUME OF DONORS FOR LIVING-RELATED LIVER-TRANSPLANTATION

Segmental liver volume determination by computed tomographic scan was carried out preoperatively in nine donors for living related liver tra nsplantation. The calculated volume was compared with the graft size a ctually obtained by three types of donor hepatectomy. The volume of th e left lateral segment (175 to 241 ml) and the left lobe (310 to 490 m l) varied markedly among the donors. The ratio of the left lobar to to tal liver volume also showed a wide range of values (23.2% to 35.9%). The value of the left lobar volume did not correlate positively with t he donor's body weight, suggesting that graft size cannot be predicted only on the basis of the donor's body size. Segmental graft liver vol ume was estimated by use of computed tomographic scan, with acceptable accuracy on comparison with the graft volume actually obtained. In li ving related liver transplantation, the type of donor hepatectomy shou ld be selected on the basis of the segmental liver volume of the donor in addition to the recipient's body size so that liver failure can be prevented in recipients and the donor's safety can be assured as far as possible.