Surgery – Instruments – Cutting – puncturing or piercing
Patent
1994-10-24
1996-11-05
Tucker, Guy V.
Surgery
Instruments
Cutting, puncturing or piercing
604165, 604170, A61M 500
Patent
active
055711340
ABSTRACT:
A safety penetrating instrument for penetrating an anatomical cavity wall to gain access to an anatomical cavity includes a distally-biased penetrating member and a distally-biased safety member, both of which are movable proximally in relation to a housing during penetration of the anatomical cavity wall. Upon penetrating into the anatomical cavity, an extending mechanism moves a cannula and/or the safety member distally relative to the housing in order to protect the distal end of the penetrating member. Extension or protrusion of the cannula and/or the safety member can be triggered by distally-biased movement of the safety member and/or the penetrating member upon entering the anatomical cavity.
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