Electrode designs in implantable defibrillator systems

• US 10,391,325 B2
• Filed: 05/04/2017
• Issued: 08/27/2019
• 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.
• Primary Examiner(s): Wehrheim, Lindsey G
• Application Number:
  US15/587,020
• Publication Number:
  US 20170319864A1
• Time in Patent Office: 845 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 with a proximal end adapted for attachment to the canister and a distal end;

at least one sensing electrode on the lead; and

at least one shocking electrode on the lead;

wherein the at least one shocking electrode extends over a length in the range of 50 to 110 millimeters and a width in the range of 5 to 35 millimeters; and

wherein the at least one sensing electrode is distal to the at least one shocking electrode.

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

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

4. The implantable defibrillator of claim 1, wherein the at least one shocking electrode comprises a solid surface electrode having a generally flattened oval shape.

5. The implantable defibrillator of claim 4, wherein the solid surface electrode comprises a solid unitary metallic structure.

6. The implantable defibrillator of claim 4, wherein the solid surface electrode comprises a metallic shell disposed over a polymeric structure.

7. The implantable defibrillator of claim 1, wherein the shocking electrode comprises an electrically conductive material at least partially embedded in a silicone carrier.

8. The implantable defibrillator of claim 7, wherein the electrically conductive material comprises one or more woven filaments.

10. The implantable defibrillator of claim 7, wherein the electrically conductive material comprises a laser cut pattern.

11. The implantable defibrillator of claim 7, wherein the shocking electrode is configured to be collapsible.

12. The implantable defibrillator of claim 7, wherein the shocking electrode has a generally rectangular peripheral shape.

13. The implantable defibrillator of claim 1, further comprising a permeable membrane positioned on the shocking electrode.

9. The implantable defibrillator of 7, wherein the electrically conductive material comprises one or more braided filaments.

14. 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 with a proximal end adapted for attachment to the canister and a distal end;

at least one sensing electrode on the lead; and

at least one shocking electrode comprising a solid surface electrode having a generally flattened oval shape on the lead;

wherein the at least one shocking electrode extends over a length in the range of 60 to 100 millimeters and a width in the range of 10 to 30 millimeters; and

wherein the at least one sensing electrode is distal to the at least one shocking electrode.

15. The implantable defibrillator of claim 14, wherein the solid surface electrode comprises a solid unitary metallic structure.

16. The implantable defibrillator of claim 14, wherein the solid surface electrode comprises a metallic shell disposed over a polymeric structure.

17. 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 with a proximal end adapted for attachment to the canister and a distal end;

at least one sensing electrode on the lead; and

at least one shocking electrode comprising an electrically conductive material at least partially embedded in a silicone carrier making up a portion of the lead;

wherein the at least one shocking electrode extends over a length in the range of 60 to 100 millimeters and a width in the range of 10 to 30 millimeters; and

wherein the at least one sensing electrode is distal to the at least one shocking electrode.

18. The implantable defibrillator of claim 17, wherein the electrically conductive material comprises one or more woven filaments.

20. The implantable defibrillator of claim 17, wherein the electrically conductive material comprises a laser cut pattern.

19. The implantable defibrillator of 17, wherein the electrically conductive material comprises one or more braided filaments.