We use ethanol injection very first to be sure proper sclerosing influence with the vessels before vessel occlusion. Other teams suggest to combine glue injection followed by ethanolamine oleate injection for sort II and III AVMs. The catheter is positioned in one of the arteries that feeds the brain AVM. https://marcokpuwz.oneworldwiki.com/6656097/arteriovenous_malformation_s_treatment_singapore_an_overview