Enlargement of the hepatic artery is present in dogs with a congenital extrahepatic portosystemic shunt and is independent of shunt insertion into the systemic circulation.
Vet Radiol Ultrasound
; 65(2): 149-156, 2024 Mar.
Article
de En
| MEDLINE
| ID: mdl-38318990
ABSTRACT
The accurate diagnosis of portovascular anomalies has been facilitated by improvements in diagnostic imaging technology. In humans, hepatic arterial blood flow changes in response to the reduction in portal blood flow. The hepatic arterial buffer response characterizes an intrinsic regulatory mechanism in response to reduced portal venous blood flow, which results in hepatic arterial enlargement. At the authors' institution, enlargement of the hepatic artery has been anecdotally observed in a population of dogs with extrahepatic portosystemic shunting, consistent with previous literature that documents variability in hepatic arterial size. In this retrospective, blinded, analytical study, a hepatic arteryaorta (HaAo) ratio was assessed on CT studies from 112 dogs, with (n = 43) and without (n = 69) an extrahepatic congenital portosystemic shunt in order to compare the hepatic artery size independent of body weight between the two populations. A significant increase in the HaAo ratio was documented in dogs with an extrahepatic portosystemic shunt (EHPSS) compared with those dogs with no EHPSS independent of the location of shunt insertion into the systemic circulation (P < .001). Three cases had repeat CT after surgery, and all had HaAo ratio reductions following treatment. The authors propose that this may be an additional imaging feature observed in dogs with an EHPSS.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Anastomose portosystémique intrahépatique par voie transjugulaire
/
Maladies des chiens
Limites:
Animals
/
Humans
Langue:
En
Journal:
Vet Radiol Ultrasound
/
Vet. radiol. ultrasound
/
Veterinary radiology and ultrasound
Sujet du journal:
DIAGNOSTICO POR IMAGEM
/
MEDICINA VETERINARIA
/
RADIOLOGIA
Année:
2024
Type de document:
Article
Pays de publication:
Royaume-Uni