Ablation medical devices

Patent metadata

Field	Value
Publication number	US-2016008053-A1
Application number	US-201514796711-A
Country	US
Kind code	A1
Filing date	Jul 10, 2015
Priority date	Jul 11, 2014
Publication date	Jan 14, 2016
Grant date	—

Abstract

Medical devices and methods for making and using medical devices are disclosed. An example medical device includes an ablation system. The ablation system may include an elongate shaft having a distal region. A plurality of ablation tines may be disposed at the distal region. Each of the ablation tines may include a tubular member having a flexible circuit disposed therein. The flexible circuit may include a substrate, one or more electrodes coupled to the substrate, and a temperature sensor coupled to the substrate and positioned adjacent to the one or more electrodes. The plurality of ablation tines may include a first ablation tine and a second ablation tine. A pair of bipolar electrodes may defined by a first electrode disposed at the first ablation tine and a second electrode disposed at the second ablation tine.

First claim

What is claimed is:

1 . An ablation system, comprising:
an elongate shaft having a distal region; a plurality of ablation tines disposed at the distal region; wherein each of the ablation tines includes a tubular member having a flexible circuit disposed therein; wherein the flexible circuit includes a substrate, one or more electrodes coupled to the substrate, and a temperature sensor coupled to the substrate and positioned adjacent to the one or more electrodes; wherein the plurality of ablation tines includes a first ablation tine and a second ablation tine; and wherein a pair of bipolar electrodes is defined by a first electrode disposed at the first ablation tine and a second electrode disposed at the second ablation tine.

2 . The ablation system of claim 1 , wherein the plurality of ablation tines includes a distal array of ablation tines and a proximal array of ablation tines.

3 . The ablation system of claim 2 , wherein the distal array of ablation tines is circumferentially offset from the proximal array of ablation tines.

4 . The ablation system of claim 1 , wherein the flexible circuit includes a first trace disposed along a first side of the substrate, the first trace being coupled to the temperature sensor.

5 . The ablation system of claim 4 , wherein the flexible circuit includes a second trace disposed along a second side of the substrate, the second trace being coupled to the first trace by a via.

6 . The ablation system of claim 5 , wherein the one or more electrodes are disposed along the second side of the substrate.

7 . The ablation system of claim 1 , wherein the flexible circuit includes an active trace disposed along a first side of the substrate, wherein the temperature sensor is coupled to the active trace, and wherein a return trace coupled to the active trace is disposed along the first side of the substrate.

8 . The ablation system of claim 1 , wherein the flexible circuit includes one or more additional temperature sensors.

9 . The ablation system of claim 1 , wherein the flexible circuit is folded within the tubular member.

10 . The ablation system of claim 1 , further comprising a processor coupled to the ablation tines.

11 . The ablation system of claim 10 , wherein the processor is capable of modulating power delivered to the pair of bipolar electrodes based on feedback from the temperature sensor.

12 . A medical device for ablating tissue, the medical device comprising:
an elongate shaft having a distal region; a distal array of ablation tines disposed along the distal region; a proximal array of ablation tines disposed adjacent to the distal array of ablation tines; wherein the distal array of ablation tines, the proximal array of ablation tines, or both are capable of shifting between a first configuration and an expanded configuration; wherein the distal array of ablation tines and the proximal array of ablation tines include a plurality of tubular members; wherein each tubular member has a flexible circuit disposed therein; wherein the flexible circuit includes a substrate, one or more electrodes disposed along the substrate and electrical coupled to the tubular member, and a temperature sensor coupled to the substrate and positioned adjacent to the one or more electrodes; wherein the plurality of tubular members define one or more pairs of bipolar electrodes; a processor coupled to the distal array of ablation tines and the proximal array of ablation tines; wherein the processor is capable of modulating power delivered to the one or more electrodes based on feedback from the temperature sensor.

13 . The medical device of claim 12 , wherein the distal array of ablation tines is circumferentially offset from the proximal array of ablation tines.

14 . The medical device of claim 12 , wherein the flexible circuit includes a first trace disposed along a first side of the substrate, the first trace being coupled to the temperature sensor.

15 . The medical device of claim 14 , wherein the flexible circuit includes a second trace disposed along a second side of the substrate, the second trace being coupled to the first trace by a via.

16 . The medical device of claim 15 , wherein the one or more electrodes are disposed along the second side of the substrate.

17 . The medical device of claim 12 , wherein the flexible circuit includes an active trace disposed along a first side of the substrate, wherein the temperature sensor is coupled to the active trace, and wherein a return trace coupled to the active trace is disposed along the first side of the substrate.

18 . The medical device of claim 12 , wherein the flexible circuit includes one or more additional temperature sensors.

19 . The medical device of claim 12 , wherein the flexible circuit is folded within the tubular member.

20 . A method for ablating tissue, the method comprising:
positioning a medical device adjacent to a target tissue, the medical device comprising:
an elongate shaft having a distal region,
a distal array of ablation tines disposed along the distal region,
a proximal array of ablation tines disposed adjacent to the distal array of ablation tines,
wherein the distal array of ablation tines, the proximal array of ablation tines, or both are capable of shifting between a first configuration and an expanded configuration,
wherein the distal array of ablation tines and the proximal array of ablation tines include a plurality of tubular members,
wherein each tubular member has a flexible circuit disposed therein,
wherein the flexible circuit includes a substrate, one or more electrodes disposed along the substrate and electrical coupled to the tubular member, and a temperature sensor coupled to the substrate and positioned adjacent to the one or more electrodes,
wherein the plurality of tubular members define one or more pairs of bipolar electrodes,
a processor coupled to the distal array of ablation tines and the proximal array of ablation tines, and
wherein the processor is capable of modulating power delivered to the one or more electrodes based on feedback from the temperature sensor;
activating the one or more electrodes; and wherein activating the one or more electrodes includes modulating power delivered to the one or more electrodes over a time period with the processor based on feedback from the temperature sensor.

Assignees

• Boston Scient Scimed Inc

Inventors

• Mathur Prabodh
• Lee Henry H
• Dandler Andres
• Ono Flavio K
• Levendusky Joseph A

Classifications

• A61B2018/00577

  Ablation · CPC title

• A61B2018/00791

  Temperature · CPC title

• A61B2018/00797

  measured by multiple temperature sensors · CPC title

• A61B2018/00642

  with feedback, i.e. closed loop control · CPC title

• A61B2018/00702

  Power or energy · CPC title