Chemical drugs for vein sclerosis and / or obliteration has been used in esophagogastric varices endoscopic management, trying to treat and prevent digestive hemorrhage as an alternative for surgical treatment. The synthetic adhesive ethyl-cyanoacrylate showing fast polymerization, low cost, commercial availability and good fluidity for intravenous injection, was useful for that purpose. OBJECTIVE: To study the ethyl-cyanoacrylate effects on venous wall, in dogs. METHODS: The cephalic vein wall changes were evaluated in 42 male adults mongrel dogs, weighing 10-13 Kg, randomly distributed in three groups (group 1 = 7 days, group 2 = 14 days and group 3 = 21 days). Single punction and injection of 1 ml of ethyl-cyanoacrilate, and 7, 14 and 21 days later operative specimen excision, having inside the polymer. The non-injected contralateral vein remained as control. Histopathological parameters evaluated (hematoxylin-eosin) were: venous obliteration by adhesive polymerization, acute and chronic inflammatory process, venous wall lesion and granulation tissue degree. RESULTS: Statistical analysis showed lumen complete obliteration and venous wall lesion in all injected animals on 7, 14 and 21 days; prominent acute and chronic inflammation on 14 and 21 days and granulation tissue found only on 21 day. CONCLUSION: Complete obliteration and venous wall injury in all injected animals was shown on 7, 14 and 21 days. Prominent acute and chronic inflammation occurred after 14th day, and granulation tissue only after the 21st day.
Veins; Cyanoacrylate; Dogs; Sclerosing solutions; Sclerotherapy
