Surgery – Instruments – Cutting – puncturing or piercing
Patent
1994-05-20
1997-06-03
Tucker, Guy V.
Surgery
Instruments
Cutting, puncturing or piercing
604165, A61B 500
Patent
active
056349343
ABSTRACT:
A retractable safety penetrating instrument for introducing a portal sleeve into a cavity in the body includes a portal sleeve and a penetrating member disposed within the portal sleeve and supported in a manner to automatically move proximally from an extended position wherein a sharp distal end of the penetrating member protrudes from the portal sleeve to a retracted position wherein the sharp distal end of the penetrating member is protected in response to distal movement of the retractable safety penetrating instrument upon penetration into a cavity in the body. A retracting mechanism moves the penetrating member proximally and is normally locked in a position preventing proximal movement of the penetrating member and is released by distal movement of an operating member to trigger retraction of the penetrating member.
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