Penetrating instrument having an expandable anchoring portion for triggering protrusion of a safety member and/or retraction of a penetrating member
First Claim
1. A penetrating instrument for penetrating an anatomical cavity wall to gain access to an anatomical cavity comprisinga cannula having a distal end for being disposed in the anatomical cavity, a proximal end for being disposed externally of the anatomical cavity and a longitudinal axis;
- a penetrating member disposed in said cannula and having a distal end for penetrating the anatomical cavity wall; and
an expandable portion disposed along said cannula a predetermined distance from said cannula distal end, said expandable portion being biased outwardly in a lateral direction transverse to said longitudinal axis to an expanded position and being movable inwardly in said lateral direction from said expanded position to a contracted position against said bias automatically in response to a force from tissue contact during penetration of the anatomical cavity wall to facilitate introduction of said cannula distal end in the anatomical cavity, said expandable portion further being biased to move outwardly in said lateral direction from said contracted position to said expanded position automatically in response to a reduction in force from tissue contact upon introduction of said expandable portion in the anatomical cavity to anchor said cannula to protrude into the anatomical cavity a distance corresponding to said predetermined distance.
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Accused Products
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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Citations
11 Claims
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1. A penetrating instrument for penetrating an anatomical cavity wall to gain access to an anatomical cavity comprising
a cannula having a distal end for being disposed in the anatomical cavity, a proximal end for being disposed externally of the anatomical cavity and a longitudinal axis; -
a penetrating member disposed in said cannula and having a distal end for penetrating the anatomical cavity wall; and an expandable portion disposed along said cannula a predetermined distance from said cannula distal end, said expandable portion being biased outwardly in a lateral direction transverse to said longitudinal axis to an expanded position and being movable inwardly in said lateral direction from said expanded position to a contracted position against said bias automatically in response to a force from tissue contact during penetration of the anatomical cavity wall to facilitate introduction of said cannula distal end in the anatomical cavity, said expandable portion further being biased to move outwardly in said lateral direction from said contracted position to said expanded position automatically in response to a reduction in force from tissue contact upon introduction of said expandable portion in the anatomical cavity to anchor said cannula to protrude into the anatomical cavity a distance corresponding to said predetermined distance. - View Dependent Claims (2, 3, 4, 5)
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6. A safety penetrating instrument for penetrating an anatomical cavity wall to gain access to an anatomical cavity comprising
a housing; -
a penetrating member having a longitudinal axis and a distal end for penetrating the anatomical cavity wall; a safety member mounted by said housing and having a distal end and being movable relative to said housing between an extended position where said safety member distal end protrudes distally from said penetrating member distal end and a retracted position where said safety member distal end is disposed proximally of said penetrating member distal end to expose said penetrating member distal end; extending means for moving said safety member distally relative to said housing to said extended position and for permitting said safety member to move proximally relative to said housing to said retracted position; handle means coupled with said safety member for manually moving said safety member proximally relative to said housing to said retracted position; locking means for locking said safety member in said retracted position during penetration of the anatomical cavity wall; an expandable portion carried by said safety penetrating instrument, said expandable portion being biased outwardly in a lateral direction transverse to said longitudinal axis to an expanded position and being movable inwardly in said lateral direction from said expanded position to a contracted position against said bias automatically in response to a force from tissue contact during penetration of the anatomical cavity wall and outwardly in the lateral direction from said contracted position to said expanded position automatically in response to a reduction in force from tissue contact upon introduction of said expandable portion in the anatomical cavity; and releasing means for triggering release of said locking means in response to movement of said expandable portion from said contracted position to said expanded position to permit said extending means to move said safety member distally relative to said housing from said retracted position to said extended position. - View Dependent Claims (7)
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8. A safety penetrating instrument for penetrating an anatomical cavity wall to gain access to an anatomical cavity comprising
a housing; -
a cannula mounted by said housing and having a distal end for being disposed in the anatomical cavity and a proximal end for being disposed externally of the anatomical cavity; a penetrating member disposed within said cannula and having a distal end for penetrating the anatomical cavity wall, said penetrating member having a longitudinal axis and being movable relative to said housing between an extended position where said distal end of said penetrating member protrudes distally from said distal end of said cannula and a retracted position proximally spaced from said extended position; retracting means for moving said penetrating member proximally relative to said housing from said extended position to said retracted position and for permitting said penetrating member to move distally relative to said housing to said extended position; handle means coupled with said penetrating member for manually moving said penetrating member distally relative to said housing to said extended position; locking means for locking said penetrating member in said extended position during penetration of the anatomical cavity wall; an expandable portion carried by said safety penetrating instrument, said expandable portion being biased outwardly in a lateral direction transverse to said longitudinal axis to an expanded position and movable inwardly in said lateral direction from said expanded position to a contracted position against said bias automatically in response to a force from tissue contact during penetration of the anatomical cavity wall and outwardly in the lateral direction from said contracted position to said expanded position automatically in response to a reduction in force from tissue contact upon introduction of said expandable portion in the anatomical cavity; and releasing means for triggering release of said locking means in response to movement of said expandable portion from said contracted position to said expanded position to permit said retracting means to move said penetrating member proximally relative to said housing from said extended position to said retracted position. - View Dependent Claims (9)
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10. A safety penetrating instrument for penetrating an anatomical cavity wall to gain access to an anatomical cavity comprising
a housing; -
a cannula having a proximal end mounted by said housing and a distal end for introduction in the anatomical cavity, said cannula being movable relative to said housing between an extended protruding position and a proximally spaced retracted position; a penetrating member disposed in said cannula and having a distal end for penetrating the anatomical wall, said penetrating member being movable relative to said housing between an extended position where said distal end of said penetrating member protrudes distally from said distal end of said retracted cannula and a retracted position where said distal end of said penetrating member is proximally spaced from said distal end of said extended cannula; extending means for moving said cannula distally relative to said housing to said cannula extended position and for permitting said cannula to move proximally relative to said housing to said cannula retracted position; retracting means for moving said penetrating member proximally relative to said housing to said penetrating member retracted position and for permitting said penetrating member to move distally relative to said housing to said penetrating member extended position; cannula locking means for locking said cannula in said cannula retracted position during penetration of the anatomical cavity wall; penetrating member locking means for locking said penetrating member in said penetrating member extended position during penetration of the anatomical cavity wall; an expandable portion carried by said safety penetrating instrument, said expandable portion being biased outwardly in a lateral direction transverse to said longitudinal axis to an expanded position and movable inwardly in said lateral direction from said expanded position to a contracted position automatically in response to a force from tissue contact during penetration of the anatomical cavity wall and outwardly in the lateral direction from said contracted position to said expanded position against said bias automatically in response to a reduction in force from tissue contact upon introduction of said expandable portion in the anatomical cavity; and releasing means for triggering release of said locking means in response to movement of said expandable portion from said contracted position to said expanded position to permit said extending means to move said cannula distally relative to said housing from said retracted position to said extended position and said retracting means to move said penetrating member proximally relative to said housing from said extended position to said retracted position. - View Dependent Claims (11)
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Specification