The invention provides a medical device having a catheter and first and second expandable members. The device may be used for protection against stroke by inserting the catheter into a carotid artery, locating the first expandable member within a common carotid artery, locating the second expandable...http://www.google.com/patents/US6626886?utm_source=gb-gplus-sharePatent US6626886 - Devices and methods for preventing distal embolization during interventional procedures
