Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1993-08-31
1994-12-27
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604171, 604164, A61M 500
Patent
active
053760751
ABSTRACT:
A trocar and catheter assembly for automatically disarming the trocar after placement of the catheter into a patient's blood vessel includes a spring urging retraction of the trocar and a releasable retainer mechanism for maintaining the trocar in an extended position during insertion of the catheter into the blood vessel. In one embodiment, the catheter is removably mounted to a handle which defines an internal passage. Disengaging the handle from the catheter after placement of the catheter into the blood vessel actuates the releasable retainer mechanism for allowing the trocar to be drawn into the handle passage under the influence of a spring, to enclose the sharpened end of the trocar after use. In another embodiment, the insertion device is in the form of a pair of wings which are movable between a closed position and an open position. The wings are in their closed position and grasped by the user when inserting the catheter into the blood vessel, and are thereafter moved to their open position. Movement of the wings to their open position actuates the releasable retainer mechanism, and the trocar is then drawn rearwardly so that its sharpened end is drawn into the catheter passage under the influence of the spring.
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Clemens Anton H.
Haughton Victor M.
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