Impact of thoracic shape on the surgical outcomes of laparoscopic-assisted living donor hepatectomy

Background: Although laparoscopic-assisted donor hepatectomy (LADH) has become the definitive procedure for harvesting living donor livers, its surgical outcomes in association with donor body shape have not been elucidated.Methods: The impact of donor factors, including thoracic shape, on LADH outcomes was retrospectively investigated. Thoracic anthropometric data were examined in all LADHs with a left/right graft between 2013 and 2022.Results: The study included 210 LADHs, consisting of 106 left- and 104 right-lobe donors with similar blood loss and similar operation time. Males have greater thoracic depth and greater thoracic width compared with females, respectively. Thoracic depth was associated with graft weight (p < 0.001), blood loss (p < 0.001), and operation time (p < 0.001). On multivariate analyses, blood loss >500 mL and operation time >8 h were associated with graft weight in the left-lobe donors, and blood loss >500 mL was associated with thoracic depth in the right-lobe donors.Conclusion: The greater thoracic depth is associated with massive blood loss in right-lobe donors. Anthropometric parameters might be helpful for estimating LADH outcomes.