Dredger stent retriever stroke is a mechanical method of stroke treatment, which involves inserting a long, thin metal stent into the blood vessel and slowly advancing it to the site of the clot in the cerebral vasculature. Once the stent reaches the clot site, the doctor can expand it, thus fixing the clot onto the stent. Then, the doctor can gently remove the stent and clot together, restoring blood flow and reducing stroke damage.