Patent ID: 8506503
Filing Date: 2013-08-13
Classification: A61B

Abstract:
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 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.