Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1998-05-26
1999-11-23
Hirsch, Paul J.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604165, A61M 5162, A61M 500
Patent
active
059892200
ABSTRACT:
A self-retracting IV catheter introducer automatically retracts the catheter needle safely within a housing when the connector attached to the cannula is separated from the housing after the cannula has been inserted into a patient. In one embodiment the housing comprises a retraction tube enclosing a retraction body having a rear portion mounted within the retraction tube and a front portion carrying a needle and extending through an opening in the front of the retraction body. A connection surface on the exposed front of the retraction body is frictionally engaged with a corresponding connection surface on the connector. Abutting surfaces between the connector and the retraction tube serve as stops. Releasable frictional engagement of the connection surfaces prevents retraction. In a second embodiment the front portion of the retraction tube extends forwardly configured as springing arms having a protrusion which engages a depression in the outer surface of an extending front portion of the retraction body. The springing arms are forcibly pressed against the front portion of the retraction body when a connector for the cannula is forcibly slidably placed over the springing arms. When the connector is separated, the arms are free to spring open releasing the retraction body for complete retraction into the retraction tube along with the needle.
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Duesman Kathryn
Shaw Thomas J.
Hirsch Paul J.
Retractable Technologies Inc.
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