Hemostatic puncture closure system and method of use

A closure assembly for sealing a percutaneous incision or puncture in the wall of a vessel, duct, lumen or hollow organ in the body of a living being, wherein the incision or puncture includes a tract extending from the opening in the wall of the vessel, duct, lumen or hollow organ to the skin of the being, the tract having an inner surface, said closure assembly comprising a first member formed of a bioabsorbable material and configured for passage through the opening in the vessel, duct, lumen or hollow organ to the interior thereof, a second member arranged to be extended proximally into the tract from said first member and having a greater flexibility than said first member for holding said first member at a desired position within the interior of the vessel, duct, lumen or hollow organ, and a third member separate from said first member and in the form of a mass of a bioabsorbable, material which is arranged for introduction in a first state into the puncture tract without entering into the vessel, duct, lumen or hollow organ and being movable within the tract along said second member relative to said first member when said first member is located within the vessel, duct, lumen or hollow organ, whereupon said third members extends along said second member and proximally of the wall of the vessel, duct, lumen or hollow organ to engage the inner surface of the tract along at least a portion of the length of the tract, said mass being alterable within tract to a second state, wherein said mass in said second state conforms to the shape of the portion of the tract in which it is located and substantially fills that portion of the tract, while cooperating with said first member to seal the incision or puncture from the flow of a fluid therethrough.