Hunt G B, Bellenger C R, Borg R, Youmans K R, Tisdall P L, Malik R
Department of Veterinary Anatomy, University of Sydney, NSW, Australia.
Vet Surg. 1998 May-Jun;27(3):203-15. doi: 10.1111/j.1532-950x.1998.tb00119.x.
To describe six dogs with congenital abnormalities involving the portal vein, caudal vena cava, or both.
Six client-owned dogs with congenital interruption of the portal vein or the caudal vena cava, or both.
Portal vein and caudal vena cava anatomy was evaluated by contrast radiography and visualization at surgery. Vascular casts or plastinated specimens were obtained in three animals.
Portal blood shunted into the caudal vena cava in four dogs and the left hepatic vein in one. Two of these five dogs also had interruption of the caudal vena cava with continuation as azygous vein, as did an additional dog, in which the portal vein was normally formed. Portal vein interruption was present in 5 of 74 (6.8%) dogs with congenital portosystemic shunts evaluated at the Veterinary Teaching Hospital during the study period.
Serious malformations of the abdominal veins were present in more than 1 in 20 dogs with single congenital portosystemic shunts.
Veterinarians involved in diagnosis and surgery for portosystemic shunts should be aware of these potential malformations, and portal vein continuity should be evaluated in all dogs before attempting shunt attenuation.
描述6只患有涉及门静脉、后腔静脉或两者的先天性异常的犬。
6只客户拥有的犬，患有门静脉或后腔静脉或两者的先天性中断。
通过造影X线摄影和手术时的可视化评估门静脉和后腔静脉的解剖结构。在3只动物中获取了血管铸型或塑化标本。
4只犬的门静脉血分流至后腔静脉，1只分流至左肝静脉。这5只犬中有2只还伴有后腔静脉中断并延续为奇静脉，另有1只犬也是如此，但其门静脉正常形成。在研究期间，兽医教学医院评估的74只患有先天性门体分流的犬中，有5只（6.8%）存在门静脉中断。
在每20只患有单一先天性门体分流的犬中，就有超过1只存在严重的腹部静脉畸形。
参与门体分流诊断和手术的兽医应了解这些潜在的畸形，并且在尝试减轻分流之前，应对所有犬的门静脉连续性进行评估。
