Origin of the v. portae and variability of its tributaries in laboratory animals. IV. The domestic rabbit (Oryctolagus cuniculus f. domestica, breed large chinchilla).

The authors studied the origin and variability of the tributaries of the v. portae in 30 domestic rabbits (Oryctolagus cuniculus f. domestica, breed Large Chinchilla) following the injection of blue-dyed latex into their portal bed. In 16 cases (53.3%), the v. portae was formed from four tributaries and in nine cases (30.0%) from three. The only constant contributory veins were the v. mesenterica cranialis and v. lienalis; the other tributaries (the v. gastroduodenalis. v. pancreaticoduodenalis cranialis and v. gastroepiploica dextra, etc) were variable. In 26 cases (86.7%), the v. gastrica sinistra joined the v. lienalis. In six cases (20.0%) it was an independent tributary of the v. portae and in six cases (20.0%) it was doubled. A v. cardiaca was found in all 30 rabbits (100%). In 23 (76.7%) it was a tributary of the v. gastrica sinistra and in seven (23.3%) it was an independent tributary of the v. portae. A v. pylorica was also present in all 30 cases (100%). In 16 (53.3%) it united with the v. gastroepiploica dextra, in eight (26.7%) it joined the v. gastroduodenalis and in four (13.3%) it was a tributary of the v. pancreaticoduodenalis cranialis. A v. pancreaticoduodenalis cranialis was found in 29 cases (96.7%). In 17 cases (56.7%) it was one of the initial tributaries of the v. gastroduodenalis and in eight (26.7%) it participated in formation of the v. portae as an independent trunk. In two cases (6.7%) it was doubled, the more cranial vein being a tributary of the v. portae.(ABSTRACT TRUNCATED AT 250 WORDS)