Penetrating instrument having an expandable anchoring portion for triggering protrusion of a safety member and/or retraction of a penetrating member

• US 5,882,340 A
• Filed: 07/02/1997
• Issued: 03/16/1999
• Est. Priority Date: 04/15/1992
• Status: Expired due to Term

• Current Assignee: Inbae Yoon
• Original Assignee: Inbae Yoon
• Inventors: Yoon, InBae
• Primary Examiner(s): McDermott, Corrine M.
• Assistant Examiner(s): RODRIGUEZ, CRIS LOIREN
• Application Number:
  US08/887,305
• Time in Patent Office: 622 Days
• Field of Search: 604/104-107, 604/109, 604/164, 604/174, 604/264
• US Class Current: 604/164.12
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 17/3496 Protecting sleeves or inner probes; Retractable tips for protecting body piercing guide needles A61M25/0612
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/00986 Malecots, e.g. slotted tubes, of which the distal end is pulled to deflect side struts
• CPC Class Codes: A61B 2017/3484 Anchoring means, e.g. spreading-out umbrella-like structure
• CPC Class Codes: A61B 2090/08021 of the patient or his organs
• CPC Class Codes: A61B 2090/0811 for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument

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.

Claims

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.

2. A penetrating instrument as recited in claim 1 and further comprising a middle member disposed between said cannula and said penetrating member, wherein said cannula includes a plurality of slots and said expandable portion includes a plurality of strips extending longitudinally along said middle member in alignment with said slots and biased in a direction transverse to said longitudinal axis to extend through said slots and be disposed outwardly of said cannula in said expanded position.

3. A penetrating instrument as recited in claim 2 and further including a flexible membrane disposed over said strips.

4. A penetrating instrument as recited in claim 2 wherein said strips are curved in said expanded position.

5. A penetrating instrument as recited in claim 2 wherein said strips include straight segments pivotally connected to one another and said segments are pivoted outwardly of said middle member in said expanded position.

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.

7. A safety penetrating instrument as recited in claim 6 wherein said expandable portion has a configuration in said expanded position forming an enlargement to anchor said safety penetrating instrument relative to the anatomical cavity.

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.

9. A safety penetrating instrument as recited in claim 8 wherein said expandable portion has a configuration in said expanded position forming an enlargement to anchor said safety penetrating instrument relative to the anatomical cavity.

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.

11. A safety penetrating instrument as recited in claim 10 wherein said expandable portion has a configuration in said expanded position to form an enlargement for anchoring said safety penetrating instrument relative to the anatomical cavity.