CONTROLLING CHARGE FLOW IN THE ELECTRICAL STIMULATION OF TISSUE

• US 20100280575A1
• Filed: 07/14/2010
• Published: 11/04/2010
• Est. Priority Date: 05/26/2005
• Status: Active Grant

• Current Assignee: Boston Scientific Neuromodulation Corporation (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Neuromodulation Corporation (Boston Scientific Corporation)
• Inventors: Carbunaru, Rafael, McClure, Kelly H., Parramon, Jordi
• Granted Patent: US 9,393,421 B2
• Time in Patent Office: Days
• US Class Current: 607/59
• CPC Class Codes: A61N 1/36103 Neuro-rehabilitation; Repair or reorganisation of neural tissue, e.g. after stroke
• CPC Class Codes: A61N 1/36107 Sexual dysfunction stimulating genital organs A61N1/36007
• CPC Class Codes: A61N 1/36146 specified by the stimulation parameters
• CPC Class Codes: A61N 1/37247 User interfaces, e.g. input or presentation means
• CPC Class Codes: A61N 1/37264 Changing the program; Upgrading firmware

Abstract

Systems of techniques for controlling charge flow during the electrical stimulation of tissue. In one aspect, a method includes receiving a charge setting describing an amount of charge that is to flow during a stimulation pulse that electrically stimulates a tissue, and generating and delivering the stimulation pulse in a manner such that an amount of charge delivered to the tissue during the stimulation pulse accords with the charge setting.

Claims

1-41. -41. (canceled)

42. A system, comprising:

memory configured for storing a charge setting value specifying an amount of charge that is to flow during a stimulation pulse; and

a waveform generator configured for generating and delivering the stimulation pulse in a manner such that an amount of charge delivered to tissue during the stimulation pulse has a value that is substantially equal to the stored charge setting value.

43. The system of claim 42, wherein each of the stored charge setting value and the value of the charge delivered to the tissue is an absolute value.

44. The system of claim 42, wherein each of the stored charge setting value and the value of the charge delivered to the tissue is an incremental or decremental value.

45. The system of claim 42, wherein the waveform generator is configured for generating a stimulation waveform that includes the stimulation pulse and a secondary pulse, the secondary pulse to reduce accumulation of charge at an electrode that has delivered the stimulation pulse.

46. The system of claim 42, further comprising an extracorporeal user interface configured for receiving the charge setting value from a user.

47. The system of claim 43, further comprising an implantable stimulator containing the memory, the waveform generator, and a wireless data receiver configured for receiving a wireless signal that includes the charge setting value from the extracorporeal user interface.

48. The system of claim 42, wherein the waveform generator has a trigger input for receiving a trigger, the waveform generator configured for terminating the generation of the stimulation pulse upon receipt of the trigger, the system further comprising a coulomb counter configured for measuring an amount of charge delivered in the stimulation pulse and to generate the trigger when the value of charge delivered to the tissue is substantially equal to the stored charge setting value, the coulomb counter having a trigger output for conveying the trigger to the trigger input of the waveform generator.

49. The system of claim 42, further comprising a converter configured for converting the stored charge setting value into one or more stimulation parameters characterizing aspects of the stimulation pulse that is to be delivered to the tissue, wherein the waveform generator is configured for generating the stimulation pulse in accordance with the stimulation parameters.

50. The system of claim 49, wherein the converter is configured for calculating a duration of the stimulation pulse based on a pulse amplitude of the stimulation pulse.

51. The system of claim 49, further comprising a data compilation storing predetermined charge setting values and corresponding predetermined stimulation pulse durations and amplitudes, wherein the converter is configured for accessing the data compilation to convert the stored charge setting values into the one or more stimulation parameters.

52. The system of claim 49, wherein the converter is configured for converting the stored charge setting value by holding one of a stimulation pulse amplitude and a stimulation pulse duration substantially constant for two or more different charge settings, and determining the other of the stimulation pulse amplitude and the stimulation pulse duration based on the stored charge setting value and the substantially constant one of the stimulation pulse amplitude and the stimulation pulse duration.

53. A system, comprising:

an extracorporeal user interface configured for receiving a charge setting value specifying an amount of charge that is to flow during a stimulation pulse; and

an implantable stimulator configured for generating and delivering the stimulation pulse in a manner such that an amount of charge delivered to tissue during the stimulation pulse has a value that is substantially equal to the stored charge setting value.

54. The system of claim 53, wherein each of the stored charge setting value and the value of the charge delivered to the tissue is an absolute value.

55. The system of claim 53, wherein each of the stored charge setting value and the value of the charge delivered to the tissue is an incremental or decremental value.

56. The system of claim 53, wherein the implantable stimulator is configured for generating a stimulation waveform that includes the stimulation pulse and a secondary pulse, the secondary pulse to reduce accumulation of charge at an electrode that has delivered the stimulation pulse.

57. The system of claim 53, wherein the implantable stimulator is configured for measuring an amount of charge delivered in the stimulation pulse, and terminating the generation of the stimulation pulse when the value of charge delivered to the tissue is substantially equal to the stored charge setting value.

58. The system of claim 53, wherein one of the extracorporeal user interface and the implantable stimulator is configured for converting the stored charge setting value into one or more stimulation parameters characterizing aspects of the stimulation pulse that is to be delivered to the tissue, wherein the implantable stimulator is configured for generating the stimulation pulse in accordance with the stimulation parameters.

59. The system of claim 58, wherein the one of the extracorporeal user interface and the implantable stimulator is configured for calculating a duration of the stimulation pulse based on a pulse amplitude of the stimulation pulse.

60. The system of claim 58, wherein the one of the extracorporeal user interface and the implantable stimulator is configured for storing predetermined charge setting values and corresponding predetermined stimulation pulse durations and amplitudes, and for accessing the data compilation to convert the stored charge setting values into the one or more stimulation parameters.

61. The system of claim 58, wherein the one of the extracorporeal user interface and the implantable stimulator is configured for converting the stored charge setting value by holding one of a stimulation pulse amplitude and a stimulation pulse duration substantially constant for two or more different charge settings, and determining the other of the stimulation pulse amplitude and the stimulation pulse duration based on the stored charge setting value and the substantially constant one of the stimulation pulse amplitude and the stimulation pulse duration.