A vascular device comprising a plurality of vessel engaging members and a valve. The device is movable from a collapsed insertion position having a first diameter to a second expanded position having a second diameter larger than the first diameter. The plurality of vessel engaging members extend outwardly...http://www.google.com.tw/patents/US6676698?utm_source=gb-gplus-share專利 US6676698 - Vascular device with valve for approximating vessel wall
