Electro-thermal device

• US 9,649,146 B2
• Filed: 08/22/2013
• Issued: 05/16/2017
• Est. Priority Date: 10/02/2012
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Orszulak, James H.
• Primary Examiner(s): Hupczey, Jr., Ronald
• Assistant Examiner(s): Vahdat, Khadijeh
• Application Number:
  US13/973,543
• Publication Number:
  US 20140094794A1
• Time in Patent Office: 1,363 Days
• Field of Search: 606 27- 52
• CPC Class Codes: A61B 18/04 by heating by applying electromagnetic radiation A61B18/18; hyperthermia using electric or magnetic fields, radiation or ultrasound A61N
• CPC Class Codes: A61B 18/08 by means of electrically-heated probes
• CPC Class Codes: A61B 18/082 Probes or electrodes therefor
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 2017/00057 Light
• CPC Class Codes: A61B 2018/00642 with feedback, i.e. closed loop control
• CPC Class Codes: A61B 2018/00702 Power or energy
• CPC Class Codes: A61B 2018/00714 Temperature
• CPC Class Codes: A61B 2018/0072 Current
• CPC Class Codes: A61B 2018/00755 Resistance or impedance
• CPC Class Codes: A61B 2018/00767 Voltage
• CPC Class Codes: A61B 2018/00779 Power or energy
• CPC Class Codes: A61B 2018/00791 Temperature
• CPC Class Codes: A61B 2018/00797 measured by multiple temperature sensors
• CPC Class Codes: A61B 2018/00827 Current
• CPC Class Codes: A61B 2018/00875 Resistance or impedance
• CPC Class Codes: A61B 2018/00892 Voltage

Abstract

An electro-thermal apparatus configured to treat tissue is provided. The electro-thermal apparatus including an electrosurgical cable configured to couple to an electrosurgical energy source. The electrosurgical cable includes supply and return lines that are wound in a double helix arrangement around a dielectric insulator within the electrosurgical cable. An electro-thermal element is provided at a distal end of the electrosurgical cable. The electro-thermal element is in electrical communication with the supply and return lines via corresponding first and second conductive traces. The first and second conductive traces have a patterned geometry and resistivity configured to convert electrical energy provided by the supply and return lines to thermal energy for treating tissue.

Claims

1. An electro-thermal apparatus configured to treat tissue, comprising:

an electrosurgical cable having a proximal portion configured to couple to an electrosurgical energy source and a distal portion including a supply line and a return line, the supply and return lines together forming a double helix configuration having a first pitch; and

an electro-thermal element having a first conductive trace in electrical communication with the supply line and a second conductive trace in electrical communication with the return line, the first and second conductive traces together forming a double helix configuration having a second pitch different than the first pitch of the double helix configuration of the supply and return lines to provide a thermal resistivity and electro-thermal output that are configured to convert electrical energy provided by the supply and return lines to thermal energy for treating tissue.

2. The electro-thermal apparatus according to claim 1, wherein the supply and return lines are covered by an insulative material.

3. The electro-thermal apparatus according to claim 1, further comprising an end cap operably coupled to a distal portion of the electro-thermal element, the end cap including at least one sensor connected to a distal portion of each of the first and second conductive traces.

4. The electro-thermal apparatus according to claim 3, wherein the at least one sensor is configured to sense at least one electrical parameter selected from the group consisting of voltage, current, impedance and power.

5. The electro-thermal apparatus according to claim 3, wherein the at least one sensor is in operable communication with the electrosurgical energy source through a closed-loop signal feedback control protocol.

6. The electro-thermal apparatus according to claim 5, further comprising:

a dielectric insulator extending longitudinally through a channel cooperatively defined by the supply and return lines; and

a lead extending longitudinally through the dielectric insulator and connecting the at least one sensor to the electrosurgical energy source.

7. The electro-thermal apparatus according to claim 1, further including an optical fiber including a plurality of optical gratings positioned adjacent the electro-thermal element and configured to sense temperature.

8. The electro-thermal apparatus according to claim 7, wherein the optical fiber is in operable communication with the electrosurgical energy source through a closed-loop signal feedback control protocol, the closed-loop signal feedback control protocol configured to control thermal energy output from the electro-thermal element.

9. The electro-thermal apparatus according to claim 8, wherein the optical fiber is disposed within a channel defined in and extending along a length of the electro-thermal element and the electrosurgical cable.

10. The electro-thermal apparatus according to claim 1, wherein the resistivity of the first and second conductive traces is different than a resistivity of the supply and return lines.

11. The electro-thermal apparatus according to claim 1, wherein the first pitch of the supply and return lines is larger than the second pitch of the first and second conductive traces.

12. A surgical system for treating tissue, comprising:

an electrosurgical energy source; and

an electro-thermal apparatus including;

an electrosurgical cable having a proximal portion configured to couple to the electrosurgical energy source and a distal portion including a supply line and a return line, the supply and return lines together forming a double helix configuration having a first pitch; and

an electro-thermal element having a first conductive trace in electrical communication with the supply line and a second conductive trace in electrical communication with the return line, the first and second conductive traces together forming a double helix configuration having a second pitch different than the first pitch of the double helix configuration of the supply and return lines to provide a thermal resistivity and electro-thermal output that are configured to convert electrical energy provided by the supply and return lines to thermal energy for treating tissue.

13. The surgical system according to claim 12, wherein the supply and return lines are covered by an insulative material.

14. The surgical system according to claim 12, further comprising an end cap operably coupled to a distal portion of the electro-thermal element, the end cap including at least one sensor connected to a distal portion of each of the first and second conductive traces.

15. The surgical system according to claim 14, wherein the at least one sensor is configured to sense at least one electrical parameter selected from the group consisting of voltage, current, impedance and power.

16. The surgical system according to claim 14, wherein the at least one sensor is in operable communication with the electrosurgical energy source through a closed-loop signal feedback control protocol.

17. The surgical system according to claim 16, further comprising:

a dielectric insulator extending longitudinally through a channel cooperatively defined by the supply and return lines; and

a lead extending longitudinally through the dielectric insulator and connecting the at least one sensor to the at electrosurgical energy source.

18. The surgical system according to claim 12, further including an optical fiber including a plurality of optical gratings positioned adjacent the electro-thermal element and configured to sense temperature.

19. The surgical system according to claim 18, wherein the optical fiber is in operable communication with the electrosurgical energy source through a closed-loop signal feedback control protocol, the closed-loop signal feedback control protocol configured to control thermal energy output from the electro-thermal element, wherein the optical fiber is disposed within a channel defined in and extending along a length of the electro-thermal element and the electrosurgical cable.

20. The surgical system according to claim 12, wherein the resistivity of the first and second conductive traces is different than a resistivity of the supply and return lines.