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  • Title: Clinical outcome of congenital extrahepatic portosystemic shunt attenuation in dogs aged five years and older: 17 cases (1992-2005).
    Author: Worley DR, Holt DE.
    Journal: J Am Vet Med Assoc; 2008 Mar 01; 232(5):722-7. PubMed ID: 18312179.
    Abstract:
    OBJECTIVE: To assess the outcome of extrahepatic portosystemic shunt (EHPSS) treatment in dogs aged 5 years and older. DESIGN: Retrospective case series. ANIMALS: 17 client-owned dogs. PROCEDURES: Medical records for dogs (> or = 5 years old) that underwent surgical attenuation of an EHPSS (1992 through 2005) were evaluated; data, including clinical signs, clinicopathologic findings, surgical procedure, and outcome, were recorded. Follow-up information was obtained via patient examination or telephone interview with veterinarians and owners. RESULTS: Dogs (5 to 9 years old [median age, 6.6 years]) had neurologic (n = 12), urinary tract (8), and gastrointestinal tract (6) EHPSS-associated clinical signs. Serum bile acids and ammonia concentrations were abnormal in all evaluated dogs. Treatment of EHPSSs included complete (n = 6 dogs) or partial (2) suture attenuation or ameroid constrictor placement (9). Two dogs died following surgery. Follow-up information (6 to 120 months) was available for 13 dogs. Deaths were attributable to heart failure (n = 1), bacterial hepatitis (2; with pyelonephritis in 1 dog), and unknown causes (3). At a median of 23 and 25 months, serum bile acids concentrations had almost normalized in 5 of 8 dogs and ammonia concentrations were within reference limits in 3 of 5 dogs, respectively; dogs with abnormal liver function test results had no associated clinical signs. Median long-term survival time was 72 months. CONCLUSIONS AND CLINICAL RELEVANCE: Attenuation of EHPSS in > or = 5-year-old dogs ameliorated signs of liver dysfunction in surviving dogs, although return of normal liver function occurred less frequently than expected.
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