System and method for delivering high current to electrosurgical device

• US 9,770,287 B2
• Filed: 05/02/2014
• Issued: 09/26/2017
• Est. Priority Date: 10/10/2008
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Kerr, Duane E.
• Primary Examiner(s): Stoklosa, Joseph
• Assistant Examiner(s): Kim, Eunhwa
• Application Number:
  US14/268,187
• Publication Number:
  US 20140243815A1
• Time in Patent Office: 1,243 Days
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 18/1442 Probes having pivoting end effectors, e.g. forceps
• CPC Class Codes: A61B 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 2018/00083 low, i.e. electrically insulating
• CPC Class Codes: A61B 2018/1286 having a specific transformer
• CPC Class Codes: A61B 2018/1467 using more than two electrodes on a single probe

Abstract

An electrosurgical system is disclosed. The system includes an electrosurgical generator adapted to supply electrosurgical power and an electrosurgical device coupled to the electrosurgical generator. The electrosurgical device includes a transformer and one or more active electrodes coupled thereto, wherein the transformer is adapted to step down the voltage of the power supplied by the electrosurgical generator.

Claims

1. An electrosurgical system, comprising:

an electrosurgical generator adapted to supply electrosurgical power, the electrosurgical generator including an isolation transformer; and

an electrosurgical device coupled to the electrosurgical generator, the electrosurgical device including;

a housing;

a shaft extending from the housing having an end-effector assembly disposed at a distal end thereof, the end-effector assembly including first and second jaw members, the first jaw member including an active electrode and the second jaw member including a return electrode; and

a step-down transformer disposed at the distal end of the shaft in proximity to the first and second jaw members, the step-down transformer including a primary winding coupled to the isolation transformer and a secondary winding coupled to an active lead of the active electrode and a return lead of the return electrode.

2. The electrosurgical system according to claim 1, wherein the end effector assembly is configured to deliver electrosurgical energy from the active electrode, through tissue positioned between the first and second jaw members, to the return electrode.

3. The electrosurgical system according to claim 1, wherein the step-down transformer is adapted to step down the voltage of the electrosurgical power supplied by the electrosurgical generator.

4. The electrosurgical system according to claim 1, wherein the electrosurgical device is a bipolar device.

5. The electrosurgical system according to claim 4, wherein the bipolar device is an electrosurgical forceps.

6. An electrosurgical instrument configured to couple to an electrosurgical generator adapted to supply electrosurgical power to the electrosurgical instrument, the electrosurgical instrument comprising:

a housing;

a shaft extending from the housing having an end-effector assembly disposed at a distal end thereof, the end-effector assembly including first and second jaw members, the first jaw member including an active electrode and the second jaw member including a return electrode; and

a step-down transformer disposed at the distal end of the shaft in proximity to the first and second jaw members, the step-down transformer adapted to step down a voltage of electrosurgical power supplied by an electrosurgical generator and including a primary winding configured to couple to an isolation transformer and a secondary winding coupled to an active lead of the active electrode and a return lead of the return electrode.

7. The electrosurgical instrument according to claim 6, wherein the end effector is configured to deliver electrosurgical energy to tissue positioned between the first and second jaw members.

8. The electrosurgical instrument according to claim 6, wherein the electrosurgical instrument is an electrosurgical forceps.

9. A method for transmitting electrosurgical energy, the method comprising:

transmitting electrosurgical power supplied by an electrosurgical generator to an electrosurgical device including a step-down transformer and at least one active electrode coupled thereto, the step-down transformer adapted to step down a voltage of the electrosurgical power supplied by the electrosurgical generator and including a primary winding configured to couple to an isolation transformer and further including a secondary winding coupled to the at least one active electrode; and

stepping down the voltage of the electrosurgical power supplied by the electrosurgical generator prior to transmitting the electrosurgical power to the at least one active electrode.

10. The method according to claim 9, wherein transmitting electrosurgical power supplied by the electrosurgical generator to the electrosurgical device further includes the electrosurgical device further including a shaft having first and second jaw members disposed at a distal end thereof.

11. The method according to claim 10, wherein transmitting electrosurgical power supplied by the electrosurgical generator to the electrosurgical device further includes the step-down transformer disposed at the distal end of the shaft in proximity to the first and second jaw members.

12. The method according to claim 9, further comprising reading an identifier associated with the electrosurgical device, the identifier adapted to store ratio data relating to a step down ratio of the step-down transformer.

13. The method according to claim 9, further comprising adjusting electrosurgical power at the electrosurgical generator based on ratio data.