Unidirectional blunting apparatus for hypodermic needles

Details Unidirectional blunting apparatus for hypodermic needles Unidirectional blunting apparatus for hypodermic needles

1996-03-08

1998-10-06

Mendez, Manuel

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

A61M 5178

Patent

active

058170600

ABSTRACT:
An apparatus which is useable to blunt the sharpened distal tip of a hypodermic needle, said apparatus comprising an elongate blunting member which is axially disposable within the lumen of the needle, and which is axially advanceable from a "non-blunting" position within the lumen to a "blunting" position wherein the blunt distal tip of the blunting apparatus protrudes out of the distal end of the needle. A positioning member may be formed on the proximal end of the blunting apparatus, said positioning member being engageable with the needle to alternately hold the blunting member in either its "non-blunting" position or its "blunting" position. One such positioning member comprises a generally cylindrical body having a series of elastomeric engagement fins formed thereon such that, when advanced into the hollow bore of the needle hub, the engagement fins will be proximally deflected and frictionally engaged thereby. Such proximal deflection and frictional engagement of the engagement fins deters proximal extraction of the blunting member, but allows the blunting member to be further advanced in the distal direction.

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