Question: I had foam sclerotherapy treatment for varicose vein 2 months ago by a technique called flebogrif catheter and I read that it may cause complications like stroke. Is the risk still probable? And what happens to the chemical substance used on the foam after the injection, does it remain in the blood stream and can it be spread by the circulation?
Answer: Foam sclerotherapy is typically not injected in a volume that would cause significant complications such as stroke. The solution ideally stays localized in the leg veins which were treated and does not travel a long distance from that site. Additionally, if the correct volume was injected, the volume of blood circulating in the body is significantly larger than the sclerosant, so there is a dilutional effect if it were to travel to the larger vessels.
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