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US 6,454,727 B1Granted
Tissue acquisition system and method of use
AssigneeSenoRx, Inc.
InventorsFred Burbank, Paul Lubock, Michael L. Jones, Martin V. Shabaz
Life of this patent
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Abstract
A tissue acquisition system includes radio frequency (RF) cutter loops which are extendable out a cannula to cut cylindrical tissue samples from a tissue of interest in a patient. The cannula includes inner and outer cannulae which are mutually rotatable and include cutouts through which the cutting loop can be rotated and longitudinally extended to perform the cuts. The tissue samples are then aspirated proximally through the cannula for collection.
Claims25
A tissue acquisition device useful in retrieving tissue samples from a patient, comprising:
- an Inner cannula having a proximal end, a distal end, a longitudinal axis extending between said proximal and distal ends, a tubular sidewall, a cut out in the sidewall and a main lumen extending within at least a portion of the inner cannula;
- an outer cannula having a proximal end, a distal end, a longitudinal axis extending between said proximal and distal ends, a tubular sidewall, a cutout in the tubular sidewall of the outer cannula and a main lumen extending within at least a portion of the outer cannula;
- a passageway extending longitudinally a long said device from said proximal end toward said distal end;
- a cutting wire slidably and rotatably disposed in said passageway, having a proximal end and a distal end and having a cutting loop at a said distal end which extends out of said passageway and which is configured to rotate out of the inner cannula to a position exterior to the outer cannula, to move longitudinally in a direction generally parallel to the longitudinal axis exterior to the outer cannula and to rotate from a position exterior to the outer cannula into the inner cannula.
1 more element
Dependencies are inferred from the claim text.