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US 8,506,503 B2Granted
System and method for performing a full thickness tissue biopsy
AssigneeCook Medical Technologies LLC
InventorsAnnette Fritscher-Ravens, Vihar C. Surti, Charles W. Agnew
Life of this patent
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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.
Claims22
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 to expose the cutting edge;
- 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, wherein the tissue traction mechanism is configured to engage and pull the tubular tissue sample into the cutting member,
- wherein, when the cutting edge is exposed, the cutting edge is configured to engage and cut out the tubular tissue sample upon rotation and distal advancement of the torsion shaft while the tissue traction mechanism engages and pulls the tubular tissue sample in order to detach the tubular tissue sample from the underlying tissue.
2 more elements
A method for performing a tissue biopsy at a remote location within a patient comprising:
- 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.
3 more elements
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 to expose the cutting edge;
- 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, wherein the tissue traction mechanism is configured to engage and pull the tubular tissue sample into the cutting member,
- wherein the protective cap comprises a rounded end to engage with the underlying tissue prior to engagement and pulling of the tubular tissue sample into the cutting member with the tissue traction mechanism.
2 more elements
Dependencies are inferred from the claim text.