The surgery involves exposing the porta hepatis (the area of the liver from which bile should drain) and attaching part of the small intestine to the exposed liver surface. The rationale for this approach is that minute residual bile duct remnants may be present in the fibrous tissue of the porta hepatis and thus provide direct connection with the intrahepatic ductule system to allow bile drainage.
^Behrman et al. Nelson Textbook of Pediatrics. Philadelphia: W.B. Saunders Company, 2000.
^Segura-Sampedro JJ; C. Bernal-Bellido; L.M. Marín-Gómez; G. Suárez-Artacho; J. Serrano-Díez-Canedo; J.M. Álamo-Martínez; F.J. Padillo-Ruiz; M.Á. Gómez-Bravo (Nov 2015). "Outcomes of Liver Transplantation During Adulthood After Kasai Portoenterostomy Due to Biliary Atresia". Transplan proc47 (9). doi:10.1016/j.transproceed.2015.09.058.