Dynamically adjustable multiphasic defibrillator pulse system and method

• US 9,855,440 B2
• Filed: 04/10/2017
• Issued: 01/02/2018
• Est. Priority Date: 06/14/2013
• Status: Active Grant

• Current Assignee: CardioThrive, Inc.
• Original Assignee: CardioThrive, Inc.
• Inventors: Raymond, Douglas M., Gray, Peter D., Savage, Walter T., Savage, Shelley J.
• Primary Examiner(s): CAREY, MICHAEL JAMES
• Application Number:
  US15/484,055
• Publication Number:
  US 20170216612A1
• Time in Patent Office: 267 Days
• Field of Search: 607 74, 607 5, 607 9, 607 11, 607 68, 607 70
• CPC Class Codes: A61N 1/36125 Details of circuitry or electric components
• CPC Class Codes: A61N 1/36153 Voltage A61N1/3616 takes precedence
• CPC Class Codes: A61N 1/3625 External stimulators
• CPC Class Codes: A61N 1/3904 External heart defibrillators [EHD]
• CPC Class Codes: A61N 1/3906 characterised by the form of the shockwave
• CPC Class Codes: A61N 1/3912 Output circuitry therefor, e.g. switches

Abstract

A dynamically adjustable multiphasic pulse system and method are provided. The dynamically adjustable multiphasic pulse system may be used as pulse system for a defibrillator or cardioverter. The dynamically adjustable multiphasic pulse system may include a subsystem that generates a first phase of a pulse, a separate subsystem that generates a second phase of the pulse and a switch element that switches between the subsystem and the separate subsystem to generate a therapeutic pulse having at least one positive phase and at least one negative phase.

Claims

1. A multiphasic pulse generator, comprising:

a subsystem that generates a first phase of a pulse, the subsystem having a power source and an energy reservoir, wherein the first phase has a shape and is one of a positive phase of the pulse and a negative phase of the pulse;

a separate subsystem that generates a second phase of the pulse, the separate subsystem having a second power source and a second energy reservoir, wherein the second phase is shaped independently from the shape of the first phase and is an opposite polarity phase to the first phase; and

a switch element that switches between the subsystem and the separate subsystem to generate a therapeutic pulse having at least one positive phase and at least one negative phase.

2. The generator of claim 1, wherein each of the subsystem and the separate subsystem further comprises a circuit that adjusts a shape of the first phase of the pulse and the second phase of the pulse, respectively.

3. The generator of claim 2, wherein the circuit includes an array of selectable resistors.

4. The generator of claim 2, wherein the circuit includes an array of selectable capacitors.

5. The generator of claim 1, wherein the switch element further comprises a high voltage switch element.

6. The generator of claim 5, wherein the high voltage switch element further comprises one or more semiconductor circuits.

7. The generator of claim 6, wherein the one or more semiconductor circuits further comprises one or more insulated gate bipolar transistors.

8. The generator of claim 1, wherein each of the subsystem and the separate subsystem further comprises control logic to control, respectively, the first and second phase of the pulse.

9. The generator of claim 8, wherein each of the control logic further comprises a lookup table to select the pulse shape.

10. A method for generating a therapeutic pulse, comprising:

generating one or more positive phases for a pulse using a power source and an energy reservoir;

generating one or more negative phases for a pulse using a second power source and a second energy reservoir; and

switching between the one or more positive phases and the one or more negative phases to generate a therapeutic pulse having at least one positive phase and at least one negative phase.

11. The method of claim 10, further comprising adjusting a shape of each of the one or more negative phases and independently adjusting a shape of each of the one or more positive phases.

12. The method of claim 10, further comprising individually selecting an amplitude of one or more of the one or more positive phases and one or more negative phases of the pulse.

13. The method of claim 10, further comprising recharging the energy reservoir when the energy reservoir is not being discharged.

14. The method of claim 10, further comprising recharging the second energy reservoir when the second energy reservoir is not being discharged.

15. The method of claim 10, further comprising alternating between the one or more positive phases and the one or more negative phases when generating the therapeutic pulse.

16. The method of claim 10, wherein generating the therapeutic pulse further comprises selecting a shape of the therapeutic pulse using a lookup table.