An apparatus for sealing a passage through tissue includes a threaded plug detachably
carried on a distal end of a delivery device. A guide wire element is receivable
through the lumens extending through the plug and delivery device that includes
expandable wings adjacent its distal end, and markers adjacent its proximal end.
During use, the guide wire element is advanced through a passage through tissue
into a blood vessel. The wings on the distal end are expanded within the vessel,
and the guide wire element withdrawn until the wings contact a wall of the vessel.
The plug is threaded into the passage over the guide wire element until the markers
appear from the delivery device, and released from the delivery device, thereby
deploying the plug member adjacent the vessel to seal the passage.