Expansile device for use in blood vessels and tracts in the body and method
A device for expansion within a blood vessel having a wall defining a lumen in the body. The device comprises an elongated tubular member having proximal and distal extremities and having a longitudinal axis. An expansile member is carried by the distal extremity of the elongated tubular member and is movable between contracted and expanded configurations. A deformable membrane having proximal and distal outer surfaces at least partially covers the expansile member in the expanded configuration. The proximal and distal outer surfaces have substantially different configurations when the expansile member is in the expanded configuration. Deployment means is carried by the proximal extremity of the elongated tubular member and is coupled to the expansile member for moving the expansile member between the contracted and expanded configurations. A handle assembly is carried by the proximal extremity of the elongated tubular member and coupled to said deployment means.
1. A method for sealing a puncture site in a blood vessel wall at the end of a tissue tract, said method comprising:
providing an expansible device having a tubular member, a first expansible member disposed on a distal end of the tubular member, a first deformable membrane at least partially disposed over the first expansible member, and a second expansible member disposed proximal to the first expansible member and on the distal end of the tubular member;
inserting the expansible device through the tissue tract so that the first expansible member goes past the puncture site and into a lumen of the blood vessel;
causing a straight wire within the first expansible member to assume a helical configuration such that the wire expands the first expansible member to an expanded configuration comprising a spherical shape, wherein the expanded first expansible member provides a supporting framework to keep the membrane taut and occlude the opening in the blood vessel wall when positioned over said opening;
deploying the second expansible member to an expanded configuration comprising an elongate cylinder, wherein the cylinder has a length sufficient to extend from the penetration through the tissue tract, wherein deploying the second expansible membrane comprises inflating the second expansible member with a predetermined volume of air.
2. The method of claim 1 , wherein the first and second expansible members are deployed sequentially.
3. The method of claim 1 , wherein the first and second expansible members are deployed simultaneously.