Retrospective study was conducted on 30 dogs with portosystemic shunt (PSS) referred to the University of Tokyo, between April 1995 and March 2001. The diagnosis of these patients was confirmed by laparotomy and the data were collected from their medical records. Among 30 patients, 90% were toy or miniature breeds and 80 % had a single extrahepatic shunt. Twenty out of 30 cases underwent attenuation of the shunt vessel either with ligation or by placing an ameroid constrictor (AC) . In 7 dogs receiving shunt vessel ligation, 4 dogs underwent partial ligation because of the increased portal pressure. All total ligation cases showed the good prognosis, but half (two out of four) of partial ligation cases still had mild clinical signs after operation.
On the contrary, most of the cases (
n= 13) underwent the placement of AC showed the excellent prognosis except for only one case which developed postligation seizure syndrome.
View full abstract