One of the top new medical breakthroughs is a neurovascular stent retriever that enters a patient's body (via catheter) and removes blood clots. This is revolutionary for stroke patients and treatment centers. Acute ischemic stroke patients have a much better likelihood of recovery . Until recently, the only approved method for removing a clot from an artery during a stroke was a medication called tissue plasminogen activator (tPA). An injection of tPA could help dissolve the clot and restore blood flow. But the drug alone doesn't always do the trick.