Brain cooling system

• US 9,849,025 B2
• Filed: 09/07/2013
• Issued: 12/26/2017
• Est. Priority Date: 09/07/2012
• Status: Active Grant

• Current Assignee: ITN Energy Systems, Inc., University of North Carolina At Charlotte (University of North Carolina System), Yale University
• Original Assignee: ITN Energy Systems, Inc., University of North Carolina At Charlotte (University of North Carolina System), Yale University
• Inventors: Zaveri, Hitten P, Spencer, Dennis D, Joshi, Bharat, Binkley, David M, Lanning, Bruce, Misra, Mohan S
• Primary Examiner(s): Smith, Kaitlyn
• Application Number:
  US14/425,950
• Publication Number:
  US 20150223971A1
• Time in Patent Office: 1,571 Days
• CPC Class Codes: A61B 5/0036 including treatment, e.g., using an implantable medical device, ablating, ventilating
• CPC Class Codes: A61B 5/291 for electroencephalography [EEG]
• CPC Class Codes: A61B 5/293 Invasive
• CPC Class Codes: A61B 5/4836 Diagnosis combined with treatment in closed-loop systems or methods A61B5/0036 takes precedence
• CPC Class Codes: A61F 2007/126 for invasive application, e.g. for introducing into blood vessels
• CPC Class Codes: A61F 7/007 characterised by electric heating
• CPC Class Codes: A61F 7/12 Devices for heating or cooling internal body cavities
• CPC Class Codes: A61N 1/36025 for treating a mental or cerebral condition
• CPC Class Codes: A61N 1/36064 Epilepsy
• CPC Class Codes: A61N 1/3655 controlled by body or blood temperature
• CPC Class Codes: A61N 1/3787 from an external energy source

Abstract

A clinical grid electrode system for seizure control through local cooling, mapping brain function and me provision of reversible functional ablation. The system includes a modular, scalable, cooling and sensing array composed of a plurality of cooling sensing elements. The system also includes a control system to which die cooling and sensing array is coupled for providing for control and monitoring of die cooling sensing elements making up the cooling and sensing array.

Claims

1. A clinical grid electrode system for seizure control through local cooling, mapping brain function and the provision of reversible functional ablation comprising:

a modular, addressable, scalable, cooling and sensing array composed of a plurality of cooling sensing elements, wherein each of the cooling sensing elements is composed of a cooling module, a temperature sensor and an EEG electrode mounted within a film supporting structure; and

a control system to which the cooling and sensing array is coupled for providing for control and monitoring of the cooling sensing elements making up the cooling and sensing array.

2. The clinical grid electrode system according to claim 1, wherein the cooling module includes an active thermoelectric cooling element with a fast response time, high heat pumping capacity, and small/thin footprint.

3. The clinical grid electrode system according to claim 2, wherein the cooling module also includes a phase change material based heat spreader.

4. The clinical grid electrode system according to claim 1, wherein the control system includes electronics for power, thermoelectric element driving, temperature sensing, and signal conditioning.

5. The clinical grid electrode system according to claim 1, wherein temperature control is implemented in a steady state mode wherein the temperature of a focal part of the brain is held at a lower temperature for several seconds or minutes.

6. The clinical grid electrode system according to claim 1, wherein temperature control is implemented in a pulse control mode, wherein a focal part of the brain is rapidly cooled using one or more brief pulses each of which will last for a few seconds to tens of seconds.

7. The clinical grid electrode system according to claim 1, wherein the control system includes a multiplexer, amplifier, A/D converter, microprocessor, infrared transceiver, antenna, power supply, external receiver, and external power transmitter.

8. The clinical grid electrode system according to claim 1, wherein the cooling sensing elements are connected to remote circuitry which is mounted within a body cavity adjacent the cooling and sensing array.

9. The clinical grid electrode system according to claim 8, wherein the remote circuitry includes a multiplexer that selects appropriate cooling sensing elements to be measured and/or activated.

10. The clinical grid electrode system according to claim 9, wherein the multiplexer is controlled by a microprocessor.

11. The clinical grid electrode system according to claim 1, wherein the cooling sensing elements are connected by an analog switch network.

12. The clinical grid electrode system according to claim 11, wherein the analog switch network creates connections between individual electrodes and functional circuitry to provide tissue stimulation current and enable remote circuitry to measure impedance.

13. A clinical grid electrode system for seizure control through local cooling, mapping brain function and the provision of reversible functional ablation comprising:

a modular scalable cooling and sensing array composed of a plurality of cooling sensing elements, wherein each of the cooling sensing elements is composed of a cooling module, a temperature sensor and an EEG electrode; and

a control system to which the cooling and sensing array is coupled for providing for control and monitoring of the cooling sensing elements making up the cooling and sensing array

wherein each of cooling sensing elements has a layered configuration with a lowermost tissue contact layer composed of the EEG electrode positioned on the cooling module, a cooling plate positioned along the lowermost tissue contact layer and to which the EEG electrode is mounted.

14. The clinical grid electrode system according to claim 13, wherein a thin-film thermoelectric cooling element with a fast response time, high heat pumping capacity, and small/thin footprint is secured to a backside of the cooling plate.

15. The clinical grid electrode system according to claim 14, wherein a heat plate and a heat spreader are mounted on a side of the thin-film thermoelectric cooling element opposite the cooling plate.

16. The clinical grid electrode system according to claim 15, wherein the heat spreader is composed of a phase change material.

17. The clinical grid electrode system according to claim 13, wherein the cooling module, the temperature sensor, and the EEG electrode are mounted within a film supporting structure and the temperature sensor is mounted along the film supporting structure at a position adjacent the cooling module and the EEG electrode.

18. A cooling sensing element for an clinical grid electrode system for seizure control through local cooling, mapping brain function and provision of reversible functional ablation, comprising:

a cooling module;

a temperature sensor; and

an EEG electrode;

wherein the cooling module, the temperature sensor and the EEG electrode are mounted within a film supporting structure.

19. The cooling sensing element according to claim 18, wherein the cooling module includes a miniaturized active thermoelectric cooling element with a fast response time, high heat pumping capacity, and small/thin footprint.

20. The cooling sensing element according to claim 19, wherein the cooling module also includes a phase change material based heat spreader.

21. A cooling sensing element for an clinical grid electrode system for seizure control through local cooling, mapping brain function and provision of reversible functional ablation, comprising:

a cooling module;

a temperature sensor; and

an EEG electrode;

wherein each of the cooling sensing elements has a layered configuration with a lowermost tissue contact layer composed of the EEG electrode positioned on the cooling module, a cooling plate positioned along the lowermost tissue contact layer and to which the EEG electrode is mounted.

22. The cooling sensing element according to claim 21, wherein a thin-film thermoelectric cooling element with a fast response time, high heat pumping capacity, and small/thin footprint is secured to a backside of the cooling plate.

23. The cooling sensing element according to claim 22, wherein a heat plate and a heat spreader are mounted on a side of the thin-film thermoelectric cooling element opposite the cooling plate.

24. The cooling sensing element according to claim 22, wherein the heat spreader is composed of a phase change material.

25. The cooling sensing element according to claim 21, wherein the cooling module, the temperature sensor, and the EEG electrode are mounted within a film supporting structure and the temperature sensor is mounted along the film supporting structure at a position adjacent the cooling module and the EEG electrode.