Temperature controlled short duration ablation

• US 10,463,428 B2
• Filed: 04/26/2019
• Issued: 11/05/2019
• Est. Priority Date: 01/25/2016
• Status: Active Grant

• Current Assignee: Biosense Webster Incorporated (Johnson & Johnson)
• Original Assignee: Biosense Webster Incorporated (Johnson & Johnson)
• Inventors: Govari, Assaf, Ephrath, Yaron, Altmann, Andres Claudio, Zilberman, Israel
• Primary Examiner(s): Cohen, Lee S
• Assistant Examiner(s): Demie, Tigist S
• Application Number:
  US16/396,246
• Publication Number:
  US 20190247116A1
• Time in Patent Office: 193 Days
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 2018/00351 Heart
• CPC Class Codes: A61B 2018/00357 Endocardium
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/00648 using more than one sensed parameter
• CPC Class Codes: A61B 2018/00666 using a threshold value
• CPC Class Codes: A61B 2018/00678 upper
• CPC Class Codes: A61B 2018/00702 Power or energy
• CPC Class Codes: A61B 2018/00714 Temperature
• CPC Class Codes: A61B 2018/00738 Depth, e.g. depth of ablation
• CPC Class Codes: A61B 2018/00744 Fluid flow
• CPC Class Codes: A61B 2018/00755 Resistance or impedance
• CPC Class Codes: A61B 2018/00761 Duration
• CPC Class Codes: A61B 2018/00791 Temperature
• CPC Class Codes: A61B 2018/00797 measured by multiple temperature sensors
• CPC Class Codes: A61B 2018/00875 Resistance or impedance
• CPC Class Codes: A61B 2090/065 for measuring contact or contact pressure
• CPC Class Codes: A61B 2217/007 with irrigation system
• CPC Class Codes: A61B 2218/002 Irrigation

Abstract

A method, including selecting a first maximum radiofrequency (RF) power to be delivered by an electrode within a range of 70 W-100 W, and selecting a second maximum RF power to be delivered by the electrode within a range of 20 W-60 W. The method also includes selecting an allowable force on the electrode within a range of 5 g-50 g, selecting a maximum allowable temperature, of tissue to be ablated, within a range of 55° C.-65° C., and selecting an irrigation rate for providing irrigation fluid to the electrode within a range of 8-45 ml/min. The method further includes performing an ablation of tissue using the selected values by initially using the first power, switching to the second power after a predefined time between 3 s and 6 s, and terminating the ablation after a total time for the ablation between 10 s and 20 s.

Claims

1. A method, comprising:

selecting a first maximum radiofrequency (RF) power to be delivered to tissue by an electrode within a range of 70 W-100 W;

selecting a second maximum RF power to be delivered to the tissue by the electrode within a range of 20 W-60 W;

selecting an allowable force on the electrode within a range of 5 g-50 g; and

performing an ablation of the tissue using the selected values by initially using the first power, switching to the second power after a predefined time between 1 s and 6 s of power delivery at the first power, and terminating the ablation after a total time for the ablation between 10 s and 20 s.

2. The method of claim 1, further comprising:

selecting a maximum allowable temperature, of the tissue to be ablated, within a range of 55°

C.-65°

C.

3. The method of claim 1, further comprising:

selecting an irrigation rate for providing irrigation fluid to the electrode within a range of 8-45 ml/min.

4. The method of claim 1, wherein the selected values include a first maximum RF power of 90 W and a second maximum RF power of 50 W.

5. The method of claim 4, wherein the first power is delivered for 4 s, and the second power is delivered for between 6 s and 16 s.

6. Apparatus, comprising:

an electrode;

a power control module configured to select a first maximum radiofrequency (RF) power to be delivered to tissue by the electrode within a range of 70 W-100 W and to select a second maximum RF power to be delivered to the tissue by the electrode within a range of 20 W-60 W; and

a processor coupled to the power control module and configured to;

select an allowable force on the electrode within a range of 5 g-50 g; and

perform an ablation of the tissue using the selected values by initially using the first power, switching to the second power after a predefined time between 1 s and 6 s of power delivery at the first power, and terminating the ablation after a total time for the ablation between 10 s and 20 s.

7. An apparatus of claim 6, wherein the processor is further configured to:

select a maximum allowable temperature, of the tissue to be ablated, within a range of 55°

C.-65°

C.

8. An apparatus of claim 6, wherein the processor is further configured to:

select an irrigation rate for providing irrigation fluid to the electrode within a range of 8-45 ml/min.

9. An apparatus of claim 6, wherein the processor is further configured to select a first maximum RF power of 90 W, and a second maximum RF power of 50 W.

10. An apparatus of claim 9, wherein the processor is further configured to deliver the first power for 4 s, and to deliver the second power for between 6 s and 16 s.