Patent ID: 8926686
Filing Date: 2015-01-06
Classification: A61F,Y10T

Abstract:
1. A temporary diameter reduction constraint arrangement for a stent graft in combination with a stent graft, the stent graft having a proximal end and a distal end and comprising a biocompatible graft material tube and a plurality of longitudinally spaced apart self-expanding stents fastened thereto, including at least an end stent and a plurality of intermediate stents, the constraint arrangement comprising: a primary release wire extending longitudinally along the graft material tube; a secondary release wire extending longitudinally along the graft material tube and deviating towards the primary release wire; a plurality of loops of thread, each loop engaged with one or other of the primary and secondary release wires and engaged around a portion of the stent graft circumferentially spaced a selected distance away from its release wire, and drawn tight and tied to itself to reduce the stent graft; an end constraint arrangement comprising four of the plurality of loops of thread arranged into a first pair and second pair, the first pair engaged with the primary release wire and the second pair engaged with the secondary release wire; a plurality of intermediate constraint arrangements, one of the intermediate constraint arrangements comprising a fifth and sixth of the plurality of loops of thread arranged into a third pair, the third pair engaged with the primary release wire, the primary release wire deviating towards the secondary release wire; and each constraint arrangement comprising pairs of loops of thread engaged with the primary release wire.