STEERABLE ABLATION DEVICE WITH LINEAR IONICALLY CONDUCTIVE BALLOON

• US 20140276811A1
• Filed: 02/28/2014
• Published: 09/18/2014
• Est. Priority Date: 03/13/2013
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: KOBLISH, JOSEF V., SUBRAMANIAM, RAJ
• Granted Patent: US 9,486,280 B2
• Time in Patent Office: Days
• US Class Current: 606/47
• 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 18/18 by applying electromagnetic radiation, e.g. microwaves radiation therapy A61N5/00
• CPC Class Codes: A61B 2017/00323 Cables or rods
• CPC Class Codes: A61B 2018/00077 high, i.e. electrically conducting
• CPC Class Codes: A61B 2018/00083 low, i.e. electrically insulating
• CPC Class Codes: A61B 2018/0022 Balloons
• CPC Class Codes: A61B 2018/00791 Temperature
• CPC Class Codes: A61B 2018/00839 Bioelectrical parameters, e.g. ECG, EEG

Abstract

Devices, systems, and methods for performing ablation therapy on body tissue are disclosed. An example ablation device for treating body tissue includes an ionically conductive balloon and a radio-frequency electrode that delivers RF energy into a distal section of the balloon. The balloon can have a composite structure with a non-conductive section and a conductive section. The ablation device can have a steering mechanism configured to deflect the balloon.

Claims

1. An ablation device for treating body tissue, comprising:

an elongate shaft having a proximal section, a distal section, and at least one fluid lumen configured to receive an electrically conductive fluid;

a steering mechanism disposed within the elongate shaft;

an inflatable balloon coupled to the distal section of the shaft and including an interior section in fluid communication with the at least one fluid lumen for actuating the balloon between a collapsed state and an expanded state, wherein at least a portion of the balloon comprises a hydrophilic polymeric material; and

at least one electrode located within the interior section of the balloon.

2. The ablation device of claim 1, wherein at least a portion of the balloon comprises a hydrophobic polymer material.

3. The ablation device of claim 1, further comprising at least one additional fluid lumen for circulating fluid through the device.

4. The ablation device of claim 1, wherein the balloon has a length and a cross-sectional width, the length being greater than the width.

5. The ablation device of claim 1, wherein the steering mechanism comprises a steering tube, a center support, a first pull wire positioned on a first side of the center support, and a second pull wire positioned on a second side of the center support.

6. The ablation device of claim 5, wherein the center support includes a tapered region.

7. The ablation device of claim 8, wherein the tapered region is disposed within the balloon.

8. The ablation device of claim 1, wherein the steering mechanism is configured to bend the balloon approximately 90°

or greater relative to a longitudinal axis of the elongate shaft in two opposite directions.

9. The ablation device of claim 5, further comprising a compression coil extending along at least a portion of the steering tube.

10. The ablation device of claim 1, further comprising one or more printed circuit electrodes disposed on an outer surface of the balloon.

11. An ablation device for treating body tissue, comprising:

an elongate shaft having a proximal section, a distal section, a first fluid lumen configured to receive an electrically conductive fluid and a second fluid lumen;

a steering mechanism disposed within the elongate shaft;

an inflatable balloon coupled to the distal section of the shaft and including an interior section in fluid communication with first and second fluid lumens for actuating the balloon between a collapsed state and an expanded state, wherein at least a first portion of the balloon comprises a hydrophilic polymeric material and a second portion of the balloon comprises a hydrophobic polymeric material; and

at least one electrode located within the interior section of the balloon.

12. The ablation device of claim 11, further comprising a sheath.

13. The ablation device of claim 12, wherein the sheath is steerable.

14. The ablation device of claim 11, wherein the steering mechanism comprises a steering tube, a center support, a first pull wire positioned on a first side of the center support, and a second pull wire positioned on a second side of the center support.

15. The ablation device of claim 14, wherein the center support includes a tapered region disposed within the balloon.

16. The ablation device of claim 11, wherein the steering mechanism is configured to bend the balloon approximately 90°

or greater relative to a longitudinal axis of the elongate shaft in two opposite directions.

17. The ablation device of claim 14, further comprising a compression coil extending along at least a portion of the steering tube.

18. An ablation device for treating body tissue, comprising:

a sheath;

an elongate shaft having a proximal section, a distal section, a first fluid lumen and a second fluid lumen;

a steering mechanism disposed within the elongate shaft, the steering mechanism comprising;

a steering tube defining a lumen therethrough;

a center support extending through the steering tube lumen, the center support including a tapered region;

a first pull wire positioned on a first side of the center support;

a second pull wire positioned on a second side of the center support; and

a compression coil extending along at least a portion of the steering tube;

an inflatable balloon coupled to the distal section of the shaft and including an interior section in fluid communication with the first and second fluid lumens for actuating the balloon between a collapsed state and an expanded state, wherein at least a first portion of the balloon comprises a hydrophilic polymeric material; and

at least one electrode located within the interior section of the balloon.

19. The ablation device of claim 18, wherein the steering mechanism is configured to bend the balloon approximately 90°

or greater relative to a longitudinal axis of the elongate shaft in two opposite directions.

20. The ablation device of claim 18, further comprising one or more printed circuit electrodes disposed on an outer surface of the balloon.