Heat-removal method and apparatus for treatment of movement disorder episodes

• US 6,629,990 B2
• Filed: 07/13/2001
• Issued: 10/07/2003
• Est. Priority Date: 07/13/2001
• Status: Expired due to Fees

• Current Assignee: AD-Tech Medical Instrument Corp.
• Original Assignee: AD-Tech Medical Instrument Corp.
• Inventors: Putz, David A., Ziobro, John
• Primary Examiner(s): GIBSON, ROY DEAN
• Application Number:
  US09/904,802
• Publication Number:
  US 20030014097A1
• Time in Patent Office: 816 Days
• Field of Search: 607/96, 607/98, 607/99, 607/113, 606/20, 606/21, 606/27, 600/544, 600/545
• US Class Current: 607/113
• CPC Class Codes: A61F 2007/0075 using a Peltier element, e.g. near the spot to be heated or cooled
• CPC Class Codes: A61F 2007/126 for invasive application, e.g. for introducing into blood vessels
• CPC Class Codes: A61F 7/12 Devices for heating or cooling internal body cavities
• CPC Class Codes: Y10S 977/712 formed from plural layers of nanosized material, e.g. stacked structures

Abstract

Heat-removal method and apparatus for treatment of movement disorder episodes; more specifically, a device and method for intracranially suppressing movement disorder episodes upon the detection of physiological symptoms. The device includes a temperature-contact implanted at a targeted portion in the brain which is determined to be associated with such episodes and connection to an implanted heat-transfer operator, typically a Peltier cooler or a thermal-electric cooler. Heat transfer from the temperature-contact to the heat-transfer operator cools the targeted portion and suppresses the movement disorder episode. Such heat transfer is performed upon the sensing of symptoms which normally preface episodes. The symptoms can be sensed intracranially by sensing-contacts, on the skin by a sensor or by a person or animal. Alternatively, heat removal (cooling) can be performed without sensing symptoms to prevent episodes when the patient is particularly sensitive to, or in danger from, episodes.

Claims

1. A method of suppressing seizures in a patient comprising:

detecting with at least one fiber optic sensing-contact positioned in the brain a physiological symptom associated with a seizure; and

in response to detection of the symptom, automatically activating a heat-transfer operator to selectively transfer heat away from a targeted portion in the brain previously identified as being related to seizures in the patient by absorbing heat into a temperature-contact situated at the targeted portion and thermally coupled to the heat-transfer operator.

2. The method of claim 1 wherein the symptom is an electrical change within the brain.

3. The method of claim 1 wherein the symptom is a chemical change within the brain.

4. The method of claim 1 wherein the symptom is an electrochemical change within the brain.

5. The method of claim 1 wherein the sensing-contact comprises at least one macro-sensing-contact.

6. The method of claim 1 wherein the sensing-contact comprises at least one micro-sensing-contact.

7. The method of claim 1 wherein the sensing-contact comprises at least one nano-sensing-contact.

8. The method of claim 1 wherein the sensing-contact and the temperature-contact are located on a distal end of a probe.

9. The method of claim 1 wherein the sensing-contact is powered by a power source, the power source supplying power to activate the heat-transfer operator upon the detection of a symptom.

10. The method of claim 9 wherein the power source stores sufficient energy to suppress seizures in a patient for an extended period of time.

11. The method of claim 9 wherein the variable power source automatically ceases to supply power to the heat-transfer operator after the targeted portion is sufficiently cooled.

12. The method of claim 11 wherein the targeted portion is sufficiently cooled when there is a subsidence of the physiological symptom, the subsidence detected by the sensing-contact.

13. The method of claim 11 wherein the targeted portion is sufficiently cooled when the targeted portion reaches a predetermined temperature.

14. The method of claim 13 wherein a thermocouple measures the temperature at the targeted portion.

15. The method of claim 11 wherein the targeted portion is sufficiently cooled when heat is transferred away from the targeted portion for a programmed period of time.

16. The method of claim 15 wherein the period of time is programmed by a physician.

17. The method of claim 1 wherein the heat-transfer operator is activated by switching on a power source, the power source supplying power to the heat-transfer operator.

18. The method of claim 17 wherein the power source automatically ceases to supply power to the heat-transfer operator after the targeted portion is sufficiently cooled.

19. The method of claim 18 wherein the targeted portion is sufficiently cooled when a programmable period of time lapses.

20. The method of claim 18 wherein the targeted portion is sufficiently cooled when the targeted portion reaches a predetermined temperature.

21. The method of claim 1 wherein the heat-transfer operator is a Peltier cooler.

22. The method of claim 21 wherein the Peltier cooler is implanted in the patient'"'"'s torso.

23. The method of claim 1 wherein the heat-transfer operator is a thermal-electric cooler.

24. The method of claim 23 wherein the thermal-electric cooler is implanted adjacent to the patient'"'"'s skull.

25. The method of claim 1 wherein the targeted portion is a small point-like volume of the brain.

26. A method of allowing suppression of a movement disorder in a patient comprising:

surgically implanting in the patient'"'"'s brain at least one temperature-contact at a predetermined targeted portion;

thermally coupling the temperature-contact to a Peltier cooler; and

operating the heat-transfer operator to transfer heat away from the temperature-contact such that the targeted portion is cooled and the movement disorder is suppressed.

27. The method of claim 26 wherein the hot junction of the Peltier cooler is implanted outside of the patient'"'"'s skull.

28. The method of claim 26 wherein the hot junction of the Peltier cooler is implanted in the patient'"'"'s torso.

29. The method of claim 26 wherein a person activates operation of the Peltier cooler after sensing a physiological symptom of a movement disorder.

30. The method of claim 29 wherein the physiological symptom is the aura preceding an epileptic seizure.

31. The method of claim 30 wherein the patient is the person performing both the detecting and the activating.

32. The method of claim 29 wherein the person is the patient.

33. The method of claim 26 further comprising the steps of:

surgically implanting in the patient'"'"'s brain at least one sensing-contact for sensing a physiological symptom of a movement disorder; and

connecting the sensing-contact to a power source which supplies power for the operation of the Peltier cooler upon the sensing of a symptom, the power source being surgically implanted in the patient'"'"'s body.

34. The method of claim 33 wherein the sensing-contact and the temperature-contact are positioned on a probe.

35. The method of claim 26 further comprising surgically implanting in the patient'"'"'s brain at least one sensing-contact for sensing a symptom of the movement disorder, the symptom being electrical changes in the brain.

36. The method of claim 26 further comprising surgically implanting in the patient'"'"'s brain at least one sensing-contact for sensing a symptom of the movement disorder, the symptom being chemical changes in the brain.

37. The method of claim 26 further comprising surgically implanting in the patient'"'"'s brain at least one sensing-contact for sensing a symptom of the movement disorder, the symptom being electrochemical changes in the brain.

38. A method of controlling or preventing seizures in a patient comprising:

sensing a symptom of an incipient seizure, the symptom being a chemical change within the brain; and

thereafter transferring heat away from a predetermined targeted portion in the brain by use of a heat-transfer operator implanted in the patient.

39. The method of claim 38 wherein at least one temperature-contact, located at the targeted portion and coupled to the heat-transfer operator, absorbs heat from the targeted portion.

40. The method of claim 39 wherein the heat-transfer operator is a Peltier cooler implanted in the patient'"'"'s torso.

41. The method of claim 39 wherein the heat-transfer operator is a thermal-electric cooler implanted adjacent to the patient'"'"'s skull.

42. The method of claim 39 wherein a person senses the symptom and activates the transfer of heat manually.

43. The method of claim 42 wherein the symptom is recognized by the patient as an aura.

44. The method of claim 38 wherein the transfer of heat automatically ceases after a predetermined period of time.

45. The method of claim 38 wherein a sensing-contact positioned in the brain senses the symptom and activates the transfer of heat automatically.

46. The method of claim 38 wherein the sensing-contact deactivates the transfer of heat after sensing a subsidence of the symptom.

47. The method of claim 38 wherein the sensing-contact deactivates the transfer of heat after a programmed period of time.

48. The method of claim 38 wherein the sensing-contact deactivates the transfer of heat when the targeted portion reaches a predetermined temperature.

49. An implanted seizure-suppressing device comprising:

at least one temperature-contact positioned at a targeted portion in the brain; and

a heat-transfer operator positioned away from the targeted portion and thermally coupled to the temperature-contact,

whereby heat is withdrawn from the targeted portion upon activation of the heat-transfer operator.

50. The device of claim 49 wherein the heat-transfer operator is a Peltier cooler implanted on the patient'"'"'s skull.

51. The device of claim 49 wherein the heat-transfer operator is a thermal-electric cooler implanted in the patient'"'"'s axilla.

52. The device of claim 49 further comprising a sensor which signals an alert upon sensing an incipient seizure so that the heat-transfer operator may be activated.

53. The device of claim 52 wherein the sensor senses changes on the surface of the patient'"'"'s skin indicative of an incipient seizure.

54. The device of claim 53 wherein the sensor is worn by the patient.

55. The device of claim 49 further comprising a power source implanted in the patient, the power source supplying power to activate the heat-transfer operator.

56. The device of claim 55 wherein a person turns on the power source.

57. The device of claim 56 wherein the person is the patient.

58. The device of claim 56 wherein the person turns on the power source before the patient performs an activity during which an occurrence of a seizure would jeopardize the patient'"'"'s safety.

59. The device of claim 56 wherein the person turns on the power source upon sensing an incipient seizure.

60. The device of claim 55 wherein the power source automatically ceases to supply power to the heat-transfer operator after heat has been sufficiently withdrawn from the targeted portion.

61. The device of claim 60 wherein heat has been sufficiently withdrawn from the targeted portion when a programmable period of time lapses.

62. The device of claim 60 wherein heat has been sufficiently withdrawn from the targeted portion when the targeted portion reaches a predetermined temperature.

63. The device of claim 55 further comprising at least one sensing-contact for detecting a physiological symptom of an incipient seizure, the sensing-contact implanted in the brain and powered by the power source.

64. The device of claim 63 wherein the sensing-contact senses electrical changes in the brain.

65. The device of claim 63 wherein the sensing-contact senses chemical changes in the brain.

66. The device of claim 63 wherein the sensing-contact senses electrochemical changes in the brain.

67. The device of claim 63 wherein the sensing-contact is connected to a controller, the controller activating the thermal-electric cooler upon detection of a symptom.

68. The device of claim 67 wherein the controller and power source are positioned in a can implanted in the patient'"'"'s torso.

69. The device of claim 67 wherein the temperature-contact and the sensing-contact are located on a probe.

70. A method of suppressing seizures in a patient comprising:

detecting a physiological symptom associated with a seizure; and

in response to detection of the symptom, selectively transferring heat away from a targeted portion in the brain previously identified as being related to seizures in the patient by absorbing heat into a temperature-contact situated at the targeted portion and thermally coupled to a thermal conveyor, the thermal conveyor transferring heat from the temperature-contact through a thermal transfer fluid.

71. The method of claim 70 wherein the thermal conveyor transfers heat from the temperature-contact to the thermal transfer fluid by conduction through mechanical contact.

72. The method of claim 70 wherein the thermal conveyor transfers heat from the temperature-contact by conduction through a thermal transfer fluid.

73. The method of claim 70 wherein the thermal conveyor transfers heat from the temperature-contact by convection through a thermal transfer fluid.

74. The method of claim 70 wherein the thermal conveyor is thermally coupled to a reaction chamber, the reaction chamber providing a site for controlled endothermic chemical reactions.

75. A method of suppressing seizures in a patient comprising:

detecting with a sensing-contact positioned in the brain a physiological symptom associated with a seizure; and

in response to detection of the symptom, activating a heat-transfer operator to selectively transfer heat away from a targeted portion in the brain previously identified as being related to seizures in the patient by absorbing heat into a temperature-contact situated at the targeted portion and thermally coupled to the heat-transfer operator, the sensing-contact deactivating the transfer of heat after sensing a subsidence of the symptom.

76. A method of suppressing seizures in a patient comprising:

providing a probe having a distal end, the distal end having a sensing-contact and a temperature-contact, the temperature-contact adapted for thermal coupling to a heat-transfer operator;

positioning the distal end in the patient'"'"'s brain such that the distal end is situated at a targeted portion in the brain previously identified as being related to seizures in the patient;

detecting with the sensing-contact a physiological symptom associated with a seizure; and

in response to detection of the symptom, automatically activating the heat-transfer operator to selectively transfer heat away from the targeted portion by absorbing heat into the temperature-contact situated at the targeted portion.

77. The method of claim 76 wherein the sensing-contact is a fiber optic contact.