Vascular Anatomy of
Segment IV of the Liver in Live Liver Donors.
Cureus 2023;
15:e46281. [PMID:
37908939 PMCID:
PMC10614085 DOI:
10.7759/cureus.46281]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2023] [Indexed: 11/02/2023] Open
Abstract
BACKGROUND
Studies on the anatomy of the liver have helped surgeries such as liver resection. Liver resection is of significance in liver transplantation. In liver resection, the anatomy of segment IV is very important as it is more prone to ischemia.
AIM
The primary objective is to study the anatomical variations of the hepatic artery and hepatic vein of segment IV from MDCT images of the hepatic vasculature in living liver donors. This study aims to document the anatomy of the hepatic artery supplying segment IV and its venous drainage in 300 living liver donors.
MATERIALS AND METHODS
In this retrospective study, 600 MDCT images of hepatic vasculature were observed, and the interpretations were recorded. The origin of the artery to segment IV was documented. The observations of the hepatic vein were tabulated as classified in Nakamura's study.
RESULTS
Segment IV artery originates from the left hepatic artery (LHA) in 72% of the cases and the right hepatic artery (RHA) in 23%. Hepatic venous drainage of segment IV comprises type I, type II, and type III in 14.33%, 53.67%, and 30% of cases, respectively. Type I anatomy of the hepatic vein is preferred in both right and left lobe liver transplantation as the drainage from segment IV is safe.
CONCLUSION
Vascularity to segment IV is key in living liver donors, as donor safety is of utmost importance in the case of living donor liver transplantation.
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