Vascular wound closure device and method

Abstract

A method and apparatus for closing a vascular wound includes an apparatus that can be threaded over a guidewire into place at or adjacent the wound. The apparatus includes a chamber that encloses a hemostatic material therein. When the apparatus is positioned adjacent the wound as desired, the hemostatic material is deployed from the chamber. A blocking member distal of the hemostatic material functions as a barrier to prevent the hemostatic material from entering the wound. Blood contacts the hemostatic material, and blood clotting preferably is facilitated by a hemostatic agent within the material. Thus, the vascular puncture wound is sealed by blood clot formation.

What is claimed is: 
     
         1 . A vascular wound closure device, comprising:
 an elongate guide sized and configured to extend partially through a vascular puncture; and   a multi-layer closure portion disposed circumferentially about the elongate guide, the closure portion being movable distally over the catheter;   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;   a second member of the closure portion comprising a hemostatic material;   wherein at least part of the first member is arranged distal of the second member, and the first member engages an outer surface of the elongate guide so that the hemostatic material of the second member is prevented from moving distally between the first member and the guide.   
     
     
         2 . A vascular wound closure device as in  claim 1  additionally comprising a push member adapted to urge the closure portion distally over the elongate guide. 
     
     
         3 . A vascular wound closure device as in  claim 2 , wherein the first member is movable separately from the second member. 
     
     
         4 . A vascular wound closure device as in  claim 2 , wherein the second member is adhered to the first member. 
     
     
         5 . A vascular wound closure device as in  claim 2 , wherein the guide comprises a catheter. 
     
     
         6 . A vascular wound closure device as in  claim 5  additionally comprising a retractor disposed about the catheter distal of the first member. 
     
     
         7 . A vascular wound closure device as in  claim 2 , wherein the guide comprises a guidewire. 
     
     
         8 . A vascular wound closure device as in  claim 2 , wherein the push member is arranged about the guide, and the push member is adapted to engage the first member so that a space is defined between a distal surface of the push member and a proximal surface of the first member. 
     
     
         9 . A vascular wound closure device as in  claim 1 , wherein the first member comprises an aperture adapted to slidably accommodate the guide, and wherein the aperture is biased to generally close when the guide is removed therefrom. 
     
     
         10 . A vascular wound closure device as in  claim 2  additionally comprising a delivery chamber, and the first member and second member are disposed at least partially within the delivery chamber. 
     
     
         11 . A vascular wound closure device as in  claim 2 , wherein the first member comprises a hemostatic material. 
     
     
         12 . A vascular wound closure device as in  claim 11 , wherein the first member is generally flexible. 
     
     
         13 . A vascular wound closure device as in  claim 11 , wherein the first member is generally rigid. 
     
     
         14 . A vascular wound closure device as in  claim 11 , wherein the first member comprises an elastic member. 
     
     
         15 . A vascular wound closure device as in  claim 11 , wherein the first member comprises a mesh. 
     
     
         16 . A vascular wound closure device as in  claim 11 , wherein the first member is hydrophilic. 
     
     
         17 . A vascular wound closure device as in  claim 11 , wherein the first member comprises chitosan. 
     
     
         18 . A vascular wound closure device as in  claim 17 , wherein the second member comprises a fibrous chitosan fleece. 
     
     
         19 . A vascular wound closure device as in  claim 18 , wherein the first member has a greater density than the second member. 
     
     
         20 . A medical method, comprising:
 puncturing a blood vessel;   inserting one or more therapy implements through the puncture wound and into the blood vessel;   performing a therapeutic surgical procedure via the one or more therapy implements;   inserting a closure catheter at least partially into the puncture wound;   providing a blocking member disposed about the outer surface of the closure catheter, the blocking member having an outer diameter greater than the puncture wound;   advancing the blocking member over an outer surface of the closure catheter and into engagement with the blood vessel outer wall; and   advancing a hemostasis-promoting material over the closure catheter.   
     
     
         21 . The medical method of  claim 20 , wherein the therapeutic surgical procedure performed via the one or more therapy implement comprises a transluminal balloon angioplasty procedure. 
     
     
         22 . The medical method of  claim 20 , wherein the blocking member has greater structural rigidity than the hemostatic material. 
     
     
         23 . The medical method of  claim 20 , wherein the closure catheter has an outer diameter greater than a greatest diameter of the one or more therapy implements that were inserted through the puncture. 
     
     
         24 . The medical method of  claim 23 , wherein the blocking member has an outer diameter greater than an outer diameter of the closure catheter.