Penetrating instrument having an expandable anchoring portion fo

Details Penetrating instrument having an expandable anchoring portion fo Penetrating instrument having an expandable anchoring portion fo

1997-07-02

1999-03-16

McDermott, Corrine M.

Surgery

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

Treating material introduced into or removed from body...

604104, 604174, 604264, A61M 2500

Patent

active

058823409

ABSTRACT:
A penetrating instrument for penetrating a wall of an anatomical cavity to gain access to the anatomical cavity includes a fixed or retractable penetrating member having a distal end for penetrating the anatomical cavity wall, a portal sleeve or a distally biased safety member having a distal end movable between an extended position protecting the distal end of the penetrating member and a retracted position exposing the distal end of the penetrating member, and an expandable portion carried by the penetrating instrument and being movable from an expanded position to a contracted position during penetration of the cavity wall and from the contracted position to the expanded position upon introduction of the expandable portion in the anatomical cavity to anchor the portal sleeve relative to the anatomical cavity wall and/or to trigger extension of the safety member and/or retraction of the penetrating member.

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