ELECTRODE DESIGNS IN IMPLANTABLE DEFIBRILLATOR SYSTEMS

• US 20190329060A1
• Filed: 07/11/2019
• Published: 10/31/2019
• Est. Priority Date: 05/04/2016
• Status: Active Grant

• Current Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Original Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Inventors: DE KOCK, ANDREW L., REDDY, G. SHANTANU, BROCK, II, ROBERT D., HAHN, STEPHEN J., KOOP, BRENDAN E., SWEENEY, MOIRA B., STAHL, WYATT K.
• Granted Patent: US 11,207,537 B2
• Time in Patent Office: Days
• CPC Class Codes: A61N 1/05 for implantation or insertion into the body, e.g. heart electrode A61N1/06 takes precedence
• CPC Class Codes: A61N 1/0504 Subcutaneous electrodes
• CPC Class Codes: A61N 1/0563 specially adapted for defibrillation or cardioversion
• CPC Class Codes: A61N 1/38 for producing shock effects
• CPC Class Codes: A61N 1/3925 Monitoring; Protecting
• CPC Class Codes: A61N 1/3956 Implantable devices for applying electric shocks to the heart, e.g. for cardioversion
• CPC Class Codes: A61N 1/3968 Constructional arrangements, e.g. casings A61N1/375 takes precedence

Abstract

A subcutaneous implantable cardioverter-defibrillator (S-ICD) comprising shocking electrodes configured to reduce the defibrillation threshold. The S-ICD may include a canister housing a source of electrical energy, a capacitor, and operational circuitry that senses heart rhythms and an electrode and lead assembly. The electrode and lead assembly may comprise a lead, at least one sensing electrode, and at least one shocking electrode. The at least one shocking electrode may extend over a length in the range of 50 to 110 millimeters and a width in the range of 1 to 40 millimeters.

Claims

1. An implantable defibrillator comprising:

a canister housing a source of electrical energy, a capacitor, and operational circuitry that senses heart rhythms; and

an electrode and lead assembly, the electrode and lead assembly comprising;

a lead body;

at least one sensing electrode; and

a shocking electrode, the shocking electrode comprising a first electrode and a second electrode each having a proximal end and a distal end, wherein the first electrode and the second electrode are each coupled to the lead at their proximal and distal ends.

2. The implantable defibrillator of claim 1, wherein the shocking electrode is configured to be actuated by pulling or pushing on a push-pull member between a delivery configuration and an implanted configuration, and the implanted configuration has a larger width than a width of the delivery configuration.

3. The implantable defibrillator of claim 1, wherein the shocking electrode is biased to an expanded configuration in which the first and second electrodes are spaced from one another in at least a portion thereof to define a first width, and the shocking electrode is collapsible into a delivery configuration by constraint within a sheath to a second width less than the first width.

4. The implantable defibrillator of claim 1, wherein at least one of the first and second electrodes comprises an electrically conductive strut.

5. The implantable defibrillator of claim 1, wherein at least one of the first and second electrodes comprises a helically wound coil electrode.

6. The implantable defibrillator of claim 1, wherein the first and second electrodes are axially spaced from a longitudinal axis of the lead body.

7. The implantable defibrillator of claim 1, wherein the at least one sensing electrode comprises a proximal sensing electrode positioned proximal to the shocking electrode and a distal sensing electrode positioned distal to the shocking electrode.

8. The implantable defibrillator of claim 1, further comprising a membrane disposed over at least a portion of the electrode and lead assembly.

9. The implantable defibrillator of claim 1 wherein the shocking electrode extends over a length in the range of 50 to 110 millimeters.

10. The implantable defibrillator of claim 1 wherein the shocking electrode extends over a length in the range of 70 to 90 millimeters.

11. The implantable defibrillator of claim 1 wherein the shocking electrode has a width in the range of 10 to 30 millimeters.

12. The implantable defibrillator of claim 1 wherein the shocking electrode has a width in the range of 15 to 25 millimeters.

13. An implantable defibrillator comprising:

a canister housing a source of electrical energy, a capacitor, and operational circuitry that senses heart rhythms; and

an electrode and lead assembly, the electrode and lead assembly comprising;

a lead body having a longitudinal axis;

at least one sensing electrode; and

a shocking electrode comprising a first coil electrode comprising a helically wound element, the first coil electrode in a relaxed state being wound into a first helical configuration about the longitudinal axis of the lead body;

wherein the shocking electrode extends over a length in the range of 50 to 110 millimeters and a width in the range of 1 to 40 millimeters.

14. The implantable defibrillator of claim 13, wherein the shocking electrode further comprises a second coil electrode comprising a helically wound element, the second coil electrode in a relaxed state being wound into a second helical configuration about the longitudinal axis of the lead body, the second helical configuration extending in a rotational direction opposite the first helical configuration.

15. The implantable defibrillator of claim 13, wherein the first coil electrode is configured to be straightened into a straightened configuration for delivery.

16. The implantable defibrillator of claim 15, wherein when in the straightened configuration, the first coil electrode has a reduced profile relative to the curved configuration.

17. The implantable defibrillator of claim 13, wherein the at least one sensing electrode comprises a proximal sensing electrode positioned proximal to the shocking electrode and a distal sensing electrode positioned distal to the shocking electrode.

18. The implantable defibrillator of claim 13, further comprising a membrane disposed over at least a portion of the electrode and lead assembly.

19. The implantable defibrillator of claim 13, wherein the shocking electrode extends over a length in the range of 60 to 100 millimeters.

20. The implantale defibrillator of claim 13, wherein the shocking electrode has a width in the range of 10 to 30 millimeters.