Medical instrument and method of use
A medical for removing tissue from a patient includes an elongated probe with a working end. A pair of jaws is provided at the working end. The jaws may be closed for cutting and treatment of the tissue. Cutting may be effective through a sharpened cutting blade, and RF cutting blade, and similar cutting edges. The tissue may be remodeled using heat generated from passive heating elements on the jaws, active heating elements on the jaws, a PTCR heating element carried by the jaws, or resistive heaters on the jaws.
1. A method of treating tissue, comprising:
clamping a selected tissue volume between a first jaw and a second jaw;
cutting the tissue volume clamped between the jaws with a cutting element disposed on at least one of the first jaw and the second jaw; and
remodeling the tissue volume clamped between the jaws with a remodeling element disposed on at least of the first jaw and the second one jaw.
2. The method of claim 1 the cutting element comprises a sharp edge at a first perimeter of the at least one jaw which cuts the tissue volume.
3. The method of claim 1 the cutting element comprises an RF electrode edge at a first perimeter of the at least one jaw which cuts the tissue volume.
4. The method of claim 1 wherein remodeling comprises heating tissue clamped between the jaws.
5. The method of claim 4 wherein said heating comprises Joule heating and/or passive conductive heating.
6. The method of claim 4 wherein said heating comprises passing RF current between first and second opposing polarity electrodes carried by the at least one jaw which cuts the tissue volume.
7. The method of claim 6 wherein the first and second opposing polarity electrodes are carried in the first and second jaws, respectively.
8. The method of claim 4 wherein said heating comprises passing current through a PTCR (positive temperature coefficient of resistance) material.
9. The method of claim 1 further comprising capturing cut tissue within a channel within at least one jaw of the first jaw and the second.
10. The method of claim 9 further comprising transporting the cut tissue in a proximal direction within the channel, wherein the channel extends through an elongated probe which carries the first jaw and the second jaw.
11. The method of claim 10 further comprising applying pressure to transport the cut tissue.
12. The method of claim 11 wherein the pressure is negative pressure that pulls the tissue proximally.
13. The method of claim 11 wherein the pressure is positive pressure that pushes the tissue proximally.