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Updated: Jul 9, 2026

Chronic Thromboembolic Pulmonary Hypertension and Assessment of Right Ventricular Function in the Piglet
Published on: November 4, 2015
Chronic peritoneal effusion secondary to partial caudal vena cava obstruction following traumatic pneumothorax in a
P M Montavon1, P Arnold, L K von Segesser
1Clinic for Small Animal Surgery, University of Zurich, Vetsuisse Faculty, Winterthurerstrasse 260, Zurich, 8057 Switzerland. pmontavon@vetclinics.unizh.ch
Abstract:
A three-year old, female Boxer Dog was treated initially with thoracocentesis for a right-sided pneumothorax. The dog was re-evaluated after three weeks because of an enlargement of the abdomen. A positive venogram revealed a ventral displacement of the caudal vena cava between the diaphragm and the heart, with a severe reduction of the diameter of the vein. An exploratory thoracotomy showed a displaced accessory lung lobe with an adhesion to the parietal pleura. Inflation of this lung lobe created a dynamic obstruction of the caudal vena cava, which resulted in ascites. Surgery offered successful treatment.
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