Thrombosis is indeed a serious problem, but even with Poco's Sentinel, "As of today all clinical studies continue to fail to definitively prove that stroke can be reduced through the use of a brain protection device," is still a rather headache-inducing topic, and some doctors even argue that Whether or not the placement device itself causes fragmentation, which I think may be the reason why larger brain protection devices like the TriGUARD 3 can significantly reduce fragmentation but not stroke