Patent ID: 8088145

Claim:
A vascular wound closure device, comprising: an elongate guide sized and configured to extend partially through a vascular puncture and into a blood vessel; a multi-layer closure portion disposed circumferentially about the elongate guide, the closure portion being movable distally over the guide; a first member of the closure portion configured to engage a blood vessel wall and having an outer diameter that is greater than a diameter of the vascular puncture; and a second member of the closure portion comprising a hemostatic material; and a push member that is movable longitudinally over the elongate guide, the push member configured to engage and apply an advancement force to at least one of the first and second members so as to move the first and second members distally over the elongate guide; the first and second members being formed separately from one another and each having a different density, the first member having a greater rigidity than the second member, the second member being pliable so as to readily deform upon application of the advancement force by the push member; wherein at least part of the first member is arranged distal of the second member, and the first member comprises an aperture having an inner diameter sized and configured to slidably engage an outer surface of the elongate guide sufficient to create a seal between the aperture inner surface and the elongate guide outer surface, the first member being sufficiently structurally sound so that the advancement force exerted by the push member will not deform the first member to the degree that a gap is formed between the first member aperture inner surface and the elongate guide outer surface, so that no part of the hemostatic material of the pliable second member can move distally between the first member and the guide outer surface even upon application of the advancement force by the push member upon at least one of the first and second members; and wherein the first member is configured to engage an outer surface of the blood vessel at and adjacent the puncture wound so as to block hemostatic material from the second member from entering the puncture wound.