System and method for delivering high current to electrosurgical device

• US 8,734,444 B2
• Filed: 10/10/2008
• Issued: 05/27/2014
• 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): Sirmons, Kevin C
• Assistant Examiner(s): CARPENTER, WILLIAM R
• Application Number:
  US12/249,218
• Publication Number:
  US 20100094288A1
• Time in Patent Office: 2,055 Days
• Field of Search: 606/45, 606/46, 606/47, 606/48, 606/49, 606/50, 606/51, 606/52, 606/205, 606/206, 606/207, 606/208, 606/209, 606/210, 606/211
• US Class Current: 606/51
• 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 opposing jaw members, at least one of the law members movable relative to the other from a first position wherein the jaw members are disposed in spaced relation relative to one another to at least a second position closer to one another wherein the jaw members cooperate to grasp tissue therebetween;

each jaw member including an electrically-conductive sealing plate, one of the electrically-conductive sealing plates functioning as an active electrode and the other electrically-conductive sealing plate functioning as a return electrode during activation such that electrosurgical energy flows from the active electrode through tissue positioned between the electrically-conductive sealing plates to the return electrode; and

a step-down transformer disposed at a distal end of the shaft in proximity to the 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;

the active lead including a proximal end disposed within the distal end of the shaft;

the return lead including a proximal end disposed within the distal end of the shaft;

wherein the step-down transformer is adapted to step down the voltage of the electrosurgical power supplied by the electrosurgical generator.

2. The electrosurgical system according to claim 1, further comprising a cable adapted to interconnect the electrosurgical generator and the electrosurgical device, the cable including at least one active line and at least one return line.

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

4. The electrosurgical system according to claim 3, wherein the bipolar device is an electrosurgical forceps.

5. 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 opposing jaw members, at least one of the jaw members movable relative to the other from a first position wherein the jaw members are disposed in spaced relation relative to one another to at least a second position closer to one another wherein the jaw members cooperate to grasp tissue therebetween;

each jaw member including an electrically-conductive sealing plate, one of the electrically-conductive sealing plates functioning as an active electrode and the other electrically-conductive sealing plate functioning as a return electrode during activation such that electrosurgical energy flows from the active electrode through tissue positioned between the electrically-conductive sealing plates to the return electrode; and

a step-down transformer disposed at a distal end of the shaft in proximity to the jaw members, the step-down transformer 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;

the active lead including a proximal end disposed within the distal end of the shaft;

the return lead including a proximal end disposed within the distal end of the shaft;

wherein the step-down transformer is adapted to step down the voltage of the electrosurgical power supplied to the electrosurgical instrument.

6. The electrosurgical instrument according to claim 5, wherein the electrosurgical instrument is an electrosurgical forceps.