Patent ID: 8702750
Filing Date: 2014-04-22
Classification: A61B

Abstract:
1. An assembly for locating and closing a vascular puncture, comprising: an elongate catheter having a lumen sized and adapted to accommodate a guidewire threaded therethrough, the catheter configured to slide over the guidewire so that a distal tip of the catheter extends through the vascular puncture; a hemostatic member comprising a hemostatic agent, the hemostatic member positioned on the catheter and arranged so as to extend circumferentially around an outer surface of the catheter, the hemostatic member having first and second layers, the second layer of the hemostatic member being soft and pliable, the first layer of the hemostatic member having a greater mechanical strength than the second layer of the hemostatic member; a retractor selectively movable between a closed position and an open position, the retractor configured to engage the outer surface of the catheter when in the closed position so that the hemostatic member is blocked from moving longitudinally over the catheter distally past the retractor when the retractor is in the closed position, the retractor configured when in the open position to provide sufficient space for the hemostatic member to move longitudinally over the catheter and through the open retractor; and an elongate push member proximal of the hemostatic member and configured to engage the hemostatic member and apply a distally-directed force to push the hemostatic member distally over the catheter; wherein the hemostatic member is cohesive so that when the push member engages and applies a distally-directed force to only a portion of one side of the hemostatic member, the entire hemostatic member moves distally over the catheter as a cohesive unit, and at least a portion of the hemostatic member remains distal of a distal end of the push member.