Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1995-01-13
1998-07-14
Rimell, Sam
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604165, 604158, A61M 5178
Patent
active
057796807
ABSTRACT:
A safety needle instrument for establishing a portal in the wall of an anatomical cavity includes a housing, a cannula either fixed to the housing or distally-biased and movable relative to the housing between an extended rest position and a proximally spaced retracted position, a needle disposed within the cannula and movable relative to the cannula between an extended position where a distal end of the needle protrudes distally from a distal end of the cannula and a retracted position proximally spaced from the extended position, a distally-biased safety shield disposed between the cannula and the needle and movable relative to the needle between an extended safety shield rest position protecting the needle distal end when the needle is retracted and a safety shield retracted position exposing the needle distal end when the needle is extended, a retracting mechanism for moving the needle from the needle extended position to the needle retracted position, a handle or knob for manually moving the needle from the needle retracted position to the needle extended position, a locking mechanism for locking the needle in the needle extended position, and a releasing mechanism responsive to penetration of the safety needle instrument into the anatomical cavity.
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