SYSTEM AND METHOD FOR PERFORMING A FULL THICKNESS TISSUE BIOPSY
First Claim
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1. A medical system for performing a tissue biopsy at a remote location within a patient comprising:
- an elongate outer member comprising an elongate torsion shaft and a tubular cutting member disposed on a distal portion of the torsion shaft, the tubular cutting member including a cutting edge circumferentially disposed about a distal end thereof, the cutting edge configured to engage and cut out a tubular tissue sample from underlying tissue upon rotation and distal advancement of the torsion shaft;
an elongate inner member movably disposed within the outer member, the inner member comprising a shaft portion having a protective cap disposed on a distal end thereof, the protective cap movable between a first position extending distally beyond the cutting edge and a second position retracted within the cutting member; and
a tissue traction mechanism movably disposed within the inner member, the tissue traction mechanism comprising a mechanical tissue anchor connected to an operating member, the operating member extending to near a proximal end of the medical system, wherein the tissue traction mechanism is configured to engage and pull the tubular tissue sample into the cutting member.
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Abstract
A medical system for performing a tissue biopsy at a remote location within a patient is disclosed. The medical system comprises an elongate outer cutting member, an elongate inner member movably disposed within the outer member, and a tissue traction member for anchoring bodily tissue and pulling a sample of the tissue within the outer cutting member.
62 Citations
21 Claims
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1. A medical system for performing a tissue biopsy at a remote location within a patient comprising:
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an elongate outer member comprising an elongate torsion shaft and a tubular cutting member disposed on a distal portion of the torsion shaft, the tubular cutting member including a cutting edge circumferentially disposed about a distal end thereof, the cutting edge configured to engage and cut out a tubular tissue sample from underlying tissue upon rotation and distal advancement of the torsion shaft; an elongate inner member movably disposed within the outer member, the inner member comprising a shaft portion having a protective cap disposed on a distal end thereof, the protective cap movable between a first position extending distally beyond the cutting edge and a second position retracted within the cutting member; and a tissue traction mechanism movably disposed within the inner member, the tissue traction mechanism comprising a mechanical tissue anchor connected to an operating member, the operating member extending to near a proximal end of the medical system, wherein the tissue traction mechanism is configured to engage and pull the tubular tissue sample into the cutting member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12)
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11. The medical system of claim 11, wherein the distal tip of the stylet has one of a corkscrew configuration and a barbed configuration.
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13. A method for performing a tissue biopsy at a remote location within a patient comprising:
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advancing a medical biopsy device comprising an outer member and an inner member to the remote location; engaging the bodily tissue with the device; anchoring the bodily tissue; retracting the inner member of the device relative to the outer member so as to expose and engage a cutting member disposed on the outer member with the bodily tissue; and rotating and distally advancing the cutting member while proximally pulling the anchored bodily tissue until a tubular tissue sample is detached from the underlying bodily tissue.
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- 14. The method of claim 14, wherein anchoring the underlying tissue comprises deploying a tissue anchor into the underlying tissue.
- 17. The method of claim 26, wherein the distal anchoring tip of the stylet comprises a barbed configuration, and inserting the distal end of the stylet comprises distally advancing the barbed anchoring tip.
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19. The method of claim 19, wherein moving one of the first handle portion and the second handle portion relative to the other comprises rotating about a longitudinal axis the first handle portion relative to the second handle portion.
Specification