Grooved slider electrode for a resectoscope

• US 5,582,610 A
• Filed: 09/30/1994
• Issued: 12/10/1996
• Est. Priority Date: 09/30/1994
• Status: Expired due to Term

• Current Assignee: Gyrus ACMI, Inc. (Olympus Corporation)
• Original Assignee: Circon Corp. (Olympus Corporation)
• Inventors: Grossi, Benedetto, Quint, Robert
• Primary Examiner(s): Pellegrino, Stephen C.
• Assistant Examiner(s): PEFFLEY, MICHAEL F
• Application Number:
  US08/312,957
• Time in Patent Office: 802 Days
• Field of Search: 606/41, 606/45-52, 128/4, 128/6, 128/898, 128/642, 600/201, 600/210
• US Class Current: 606/46
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 18/1485 having a short rigid shaft for accessing the inner body through natural openings
• CPC Class Codes: A61B 18/149 bow shaped or with rotatable body at cantilever end, e.g. for resectoscopes, or coagulating rollers
• CPC Class Codes: A61B 2018/00505 Urinary tract
• CPC Class Codes: A61B 2018/00547 Prostate
• CPC Class Codes: A61B 2018/00559 Female reproductive organs
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/00625 Vaporization
• CPC Class Codes: A61B 2018/143 multiple needles

Abstract

A grooved slider forming part of an electrode for use with a resectoscope is shown. The electrode includes an electrode lead member having an elongated conductor member. The elongated conductor member has a first end and a second end with an insulative cover extended therebetween. The first end has a protruding electrode adapted to be electrically connected to an electrosurgical generator and the second end terminates in an active member. An electrode support member is operatively connected to the active member. The electrode support member has an elongated semi-rigid bifurcated arm terminating in a conductive core spaced a predetermined distance from the active member. The bifurcated arm is covered with an insulative material except at the distal end where the grooved slider is located. The electrode support member has a grooved slider having a central opening extending therethrough for fixedly mounting the grooved slider on the conductive core of the support member.

A method for treating and vaporizing tissue, such as prostate tissue, using the grooved slider electrode for a resectoscope is also shown.

Claims

1. An electrode for use with a resectoscope comprising

an electrode lead member terminating in an active member;

an electrode support member operatively connected to said active member having an elongated semi-rigid bifurcated arm terminating in a conductive core spaced a predetermined distance from said active member; and

a grooved slider having protrusions forming areas of increased current densities fixedly attached in a predetermined orientation to said conductive core.

2. The electrode of claim 1 further comprising

an insulative covering applied to the bifurcated arm with the conductive core exposed to fixedly support said grooved slider.

3. An electrode for use with a resectoscope comprising

an electrode lead member including an elongated conductor member having a first end and a second end with an insulative cover extended therebetween, said first end having a protruding electrode adapted to be electrically connected to an electrosurgical generator, said second end terminating in an active member;

and

an electrode support member operatively connected to said loading member having an elongated semi-rigid bifurcated arm terminating in a conductive core spaced a predetermined distance from said active member, said electrode support member including a grooved slider having protrusions forming areas of increased current densities fixedly mounting in a predetermined orientation on said conductive core.

4. The electrode of claim 3 further comprising

an electrode stabilizer for stabilizing the grooved slider proximate a distal region of a telescope, said stabilizer being made of a resilient and flexible dielectric material for resiliently laterally mounting the electrode to a telescope and for insulating the electrode from a telescope.

5. A method for treating tissue comprising the steps of

inserting into a resectoscope working element an electrode wherein the electrode has an electrode lead member includes an elongated conductor member having a first end and a second end with an insulative cover extended therebetween wherein said first end has a protruding electrode adapted to be electrically connected to an electrosurgical generator and wherein said second end terminates in a loading member and having an electrode support having an elongated semi-rigid bifurcated arm terminating in a conductive core spaced a predetermined distance from the loading member and wherein the electrode support member has grooved slider having protrusions forming areas of increased current densities fixedly mounted on the conductive core;

visually positioning the grooved slider in the proximity of the tissue to be treated;

irrigating the tissue to be treated with an irrigation fluid; and

applying an electrosurgical cutting current to said grooved slider at a selected voltage level of between about 200 volts to about 300 volts; and

moving the grooved slider having an electrosurgical cutting current applied thereto over the tissue to be treated to ablate the tissue.

6. A method for treating prostate tissue comprising the steps of

positioning a grooved slider having protrusions forming areas of increased current densities in proximity of the prostate tissue to be treated:

applying a high electrosurgical cutting current to the grooved slider at a selected voltage level of between about 200 volts to about 400 volts; and

moving the grooved slider having protrusions forming areas of increased current densities while having the electrosurgical cutting current applied thereto over a selected portion of prostate tissue to be treated to vaporize the tissue and form a coagulation layer in a remaining crater of treated tissue of at least 1 mm.

7. An electrode for use with a resectoscope comprising

an electrode lead member including an elongated conductor member having a first end and a second end with an insulative cover extended therebetween, said first end having a protruding electrode adapted to be electrically connected to an electrosurgical generator, said second end terminating in an active member;

and

an electrode support member operatively connected to said loading member having an elongated semi-rigid bifurcated arm terminating in a conductive core spaced a predetermined distance from said active member, said electrode support member having grooved slider fixedly mounting in a predetermined orientation on said conductive core and wherein said grooved slider is generally in the form of a planar base having a support surface and a treating surface, said support surface including a connecting member having a central opening for receiving said conductive core and for rigidly attaching said grooved slider to said conductive core and said treating surface has a plurality of spaced raised rails.

8. The electrode of claim 7 wherein the plurality of spaced raised rails are in form of spaced substantially parallel rails.

9. The electrode of claim 7 wherein the rails have a substantially rectangular cross-section and a selected height and wherein elongated slots are formed therebetween.

10. The electrode of claim 7 wherein said rails have a substantially triangular cross-section and a selected height and wherein elongated slots are formed therebetween.

11. An electrode for use with a resectoscope comprising

an electrode lead member including an elongated conductor member having a first end and a second end with an insulative cover extended therebetween, said first end having a protruding electrode adapted to be electrically connected to an electrosurgical generator, said second end terminating in an active member;

and

an electrode support member operatively connected to said loading member having an elongated semi-rigid bifurcated arm terminating in a conductive core spaced a predetermined distance from said active member, said electrode support member having grooved slider fixedly mounting in a predetermined orientation on said conductive core wherein said slider electrode is in the form of a sawtooth member having a plurality of spaced, triangular shaped slots having a selected depth forming a treating surface having at least two spaced ridges.

12. An electrode for use with a resectoscope comprising

an electrode lead member including an elongated conductor member having a first end and a second end with an insulative cover extended therebetween, said first end having a protruding electrode adapted to be electrically connected to an electrosurgical generator, said second end terminating in an active member;

and

an electrode support member operatively connected to said loading member having an elongated semi-rigid bifurcated arm terminating in a conductive core spaced a predetermined distance from said active member, said electrode support member having grooved slider fixedly mounting in a predetermined orientation on said conductive core wherein the slider electrode has a treating surface in the form of a plurality of spaced, parallel teeth.

13. An electrode for use with a resectoscope comprising

an electrode lead member including an elongated conductor member having a first end and a second end with an insulative cover extended therebetween, said first end having a protruding electrode adapted to be electrically connected to an electrosurgical generator, said second end terminating in an active member;

and

an electrode support member operatively connected to said loading member having an elongated semi-rigid bifurcated arm terminating in a conductive core spaced a predetermined distance from said active member, said electrode support member having grooved slider fixedly mounting in a predetermined orientation on said conductive core wherein the slider electrode has a treating surface in the form of a plurality of spaced, substantially parallel, conically shaped teeth having a selected height and spaces formed therebetween.

14. An electrode for use with a resectoscope comprising

an electrode lead member including an elongated conductor member having a first end and a second end with an insulative cover extended therebetween, said first end having a protruding electrode adapted to be electrically connected to an electrosurgical generator, said second end terminating in an active member;

and

an electrode support member operatively connected to said loading member having an elongated semi-rigid bifurcated arm terminating in a conductive core spaced a predetermined distance from said active member, said electrode support member having grooved slider fixedly mounting in a predetermined orientation on said conductive core wherein said slider electrode has a treated surface in the form of two sections wherein a first section has two parallel rails having a selected height and elongated slots formed therebetween and a second section has three parallel rails having a selected height and elongated slots formed therebetween.

15. The electrode of claim 14 wherein the rails have a substantially triangular shaped cross-section.