Objective To establish the canine model of esophageal variees caused by portal hyper-tension. Methods The model was established in 12 dogs with a side-to-side portacaval shunt, an ameroid constrictor around the portal vein and double ligation and cross suture of the cephalic part of the inferior vena cava (IVC), and the development of esophageal varices was confirmed 6 weeks later by endoscopy and portal vein angiography. Results The mean pre- and postoperative portal pressure were (11.0 ± 1.1) mm Hg and (22. 9 ± 1.2) nun Hg, respectively (P =0. 010). Endoscopy detected mild to moderate esophageal varices in all dogs, which was confirmed by portal vein angiography, and varices was also seen in abdominal wall. Conclusion Canine model of esophageal varices induced by portal hypertension can be established with the procedure.

Non-invasive manometry of esophageal varices is a cynosure of researchers. This paper develops a method based on computer vision. Experiments results reveal that correct pressure value can be got quickly.
Aged ; Algorithms ; Artificial Intelligence ; Automatic Data Processing ; Esophageal and Gastric Varices ; physiopathology ; Female ; Humans ; Male ; Manometry ; instrumentation ; methods ; Middle Aged ; Pattern Recognition, Automated ; Venous Pressure