Patent ID: 7806856

Claim:
An apparatus for providing hemostasis within a puncture extending through tissue, comprising: an elongate member comprising proximal and distal ends defining a longitudinal axis therebetween, and a lumen extending between the proximal and distal ends, the distal end having a size sufficient to be inserted into a relatively small puncture or body lumen and terminating in a substantially atraumatic tip; an expandable member carried on the distal end of the elongate member proximal to the atraumatic tip; a housing on the proximal end of the elongate member, the housing including an interior communicating with the lumen of the elongate member; a valve assembly comprising a one-way valve allowing access into the housing interior upon application of a pressure differential across the valve for delivering fluid into the housing interior to expand the expandable member, the one-way valve otherwise biased closed to provide a substantially fluid-tight seal that prevents fluid from escaping from the housing interior, the valve assembly further comprising a movable plunger that is insertable through the valve and an actuator coupled to the plunger for inserting the plunger through the valve for manually overriding and opening the valve to allow access into the housing interior; a piston slidable within the housing interior from a distal position to a proximal position as fluid is delivered through the valve into the housing interior; and a connecting member coupled to the piston and extending to a location distal to the expandable member, a distal end of the expandable member is directed proximally by the connecting member as the piston moves from the distal position to the proximal position for shortening the expandable member as the expandable member expands.