Method and implantable system for constant current pacing
AssigneePacesetter, Inc.
InventorsReza Shahandeh, Ninous Davoudi, Frank Lee, David Doudna, Jeffery Crook
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Abstract
An implantable system includes an implantable medical device (IMD) and a non-transvenous lead that is configured to be implanted outside of a heart. The IMD includes an output configured to be connected at least to the lead, a current generator (CG) circuit configured to generate pacing pulses, a switching circuit coupled between the CG circuit and the output, one or more capacitors coupled in parallel with the CG circuit and the switching circuit, and a control circuit coupled to the CG circuit. The control circuit is configured to manage the CG circuit to generate the pacing pulses with a constant current at the output.
Claims20
An implantable system, comprising:
- a non-transvenous lead configured to be implanted outside of a heart;
- and
- an implantable medical device (IMD), comprising:
- an output configured to be connected at least to the lead;
- a current generator (CG) circuit configured to generate pacing pulses;
- a switching circuit coupled between the CG circuit and the output;
- one or more capacitors coupled in parallel with the CG circuit and the switching circuit;
- and
- one or more processors coupled to the CG circuit and configured to manage the CG circuit to generate the pacing pulses with a constant current at the output.
A computer-implemented method for delivering stimulation therapy, the method comprising:
- managing, via one or more processors, a current generator (CG) circuit of an implantable medical device (IMD) to generate pacing pulses with a constant current at an output of the IMD, wherein the output is configured to be connected at least to a non-transvenous lead implanted outside of a heart;
- and
- delivering the pacing pulses generated by the CG circuit via the non-transvenous lead,
- wherein the IMD further comprises a switching circuit coupled between the CG circuit and the output, and one or more capacitors coupled in parallel with the CG circuit and the switching circuit.
An implantable system, comprising:
- a non-transvenous lead configured to be implanted outside of a heart;
- and
- an implantable medical device (IMD), comprising:
- an output configured to be connected at least to the lead;
- a current generator (CG) circuit comprising a flyback transformer configured to generate pacing pulses;
- a switching circuit coupled between the CG circuit and the output;
- one or more capacitors coupled in parallel with the CG circuit and the switching circuit;
- and
- one or more processors coupled to the CG circuit and configured to
- manage delivery of a multi-phase therapy that includes first and second phase therapies, wherein:
- a) during the first phase therapy, the one or more processors are configured to control the CG circuit to charge the one or more capacitors and use electrical energy stored in the one or more capacitors to deliver one or more shock pulses via the non-transvenous lead;
- and b) during the second phase therapy, the one or more processors are configured to control the CG circuit to generate the pacing pulses with a constant current at the output, independent of the one or more capacitors.
Dependencies are inferred from the claim text.