Biliary obstruction in a canine model: sequential study of the sonographic threshold.
Complete occlusion of the common bile duct was surgically created in eight dogs. Sequential gray-scale ultrasound studies were performed with serum bilirubin determinations. Dilatation of the intrahepatic biliary radicles was first recognized sonographically from five to eight days postoperatively (average 6.4 days). The findings indicate a temporal lag between the onset of obstruction and recognition by ultrasound. In the appropriate clinical setting, a delayed repeat examination may be advisable. No correlation between ductal dilatation and serum bilirubin levels was ascertained.
D000818:Animals; D001663:Bilirubin / Q000097:blood; D002779:Cholestasis / Q000097:blood / Q000175:diagnosis*; D004285:Dogs; D013997:Time Factors; D014463:Ultrasonography
D001663:Bilirubin