Complete ligation of extrahepatic congenital portosystemic shunts in nonencephalopathic dogs.
OBJECTIVE
To evaluate lack of encephalopathy as a positive prognostic factor for complete ligation of extrahepatic congenital portosystemic shunts in dogs.


METHODS
Retrospective analysis of case records.


METHODS
Dogs with extrahepatic congenital portosystemic shunts treated at the Veterinary Medical Teaching Hospital of the College of Veterinary Medicine, Cornell University, from 1985 to 1996.


METHODS
The ability to completely ligate the shunting vessel in 12 nonencephalopathic dogs was compared with that in 44 encephalopathic dogs with similar shunts.


RESULTS
Clinical signs in the 12 nonencephalopathic dogs were related to ammonium biurate urolithiasis. All 12 dogs had single extrahepatic shunting vessels. The rate of complete ligation in the nonencephalopathic dogs was 92%, whereas the rate of complete ligation in the 44 encephalopathic dogs with single extrahepatic shunts was 59%. The ability to completely ligate the shunt in nonencephalopathic dogs was significantly better (P = .04) than in the encephalopathic dogs.


CONCLUSIONS
Lack of encephalopathy is a positive prognostic factor for complete ligation of single extrahepatic congenital portosystemic shunts.


CONCLUSIONS
In most affected dogs, extrahepatic congenital portosystemic shunts in nonencephalopathic dogs can be completely ligated.
Harvey
J
J
Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
Erb
H N
HN
D000818:Animals; D004283:Dog Diseases / Q000209:etiology; D004285:Dogs / Q000002:abnormalities* / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006501:Hepatic Encephalopathy / Q000209:etiology / Q000662:veterinary*; D008026:Ligation / Q000662:veterinary; D008297:Male; D011168:Portal System / Q000002:abnormalities* / Q000601:surgery*; D012189:Retrospective Studies; D014545:Urinary Calculi / Q000737:chemistry / Q000150:complications / Q000662:veterinary