Electrode apparatus, systems and methods
Apparatus, system, and method that include a pacing apparatus having a stent electrode through which pulses of electrical current can be delivered. Stent electrodes receive energy for generating the electrical current from a variety of sources. Sources include from one or more induction coils that can form at least a portion of the stent. Sources can also include an implantable pulse generator coupled to a lead through which pulses of the electrical current are supplied to the stent electrodes.
1. An apparatus, comprising:
an intravascularly-deliverable wireless stent electrode assembly comprising:
an expandable mechanical structure;
a plurality of at least partially overlapping induction coils attached to the expandable mechanical structure, and electrically insulated from the expandable mechanical structure, and from each other, each induction coil including an elongate body positioned along a long axis of the stent and configured to wirelessly receive magnetically-coupled energy;
one or more electrostimulation electrodes electrically configured to deliver at least some of the received magnetically-coupled energy as an electrostimulation to one or more tissue sites;
wherein the plurality of induction coils are deformable and configured to open when the mechanical structure is expanded;
wherein at least two of the plurality of induction coils are positioned at least partially orthogonally relative to each other; and
wherein each elongate body includes a laminar construction and is configured to be electrically insulated from one or more at least partially overlapping adjacent laminae, and electrically insulated from the expandable mechanical structure.
2. The apparatus of claim 1 , comprising:
a control circuit comprising an energy storage device electrically connected to the induction coil, the energy storage device configured to store at least some of the magnetically-coupled energy, the control circuit positioned at an end of the wireless stent electrode assembly and configured to provide a signal in coordination with one or more predetermined events and, in response to the signal, the one or more electrostimulation electrodes are configured to deliver the at least some of the stored magnetically-coupled energy to the one or more tissue sites.
3. An apparatus, comprising:
an intravascularly-deliverable wireless stent electrode assembly comprising:
an expandable mechanical structure;
a plurality of at least partially overlapping induction coils attached to the expandable mechanical structure, and electrically insulated from the expandable mechanical structure, and from each other, the induction coils extending circumferentially along a longitudinal axis of the wireless stent electrode assembly and at least partially encircling the wireless stent electrode assembly, the induction coils configured to wirelessly receive magnetically-coupled energy;
one or more electrostimulation electrodes at least partially encircling the wireless stent electrode assembly, the one or more electrostimulation electrodes electrically connected to one or more of the plurality of induction coils, the one or more electrostimulation electrodes configured to deliver at least some of the received magnetically-coupled energy as an electrostimulation to one or more tissue sites;
wherein the plurality of induction coils are each deformable and each configured to open when the expandable mechanical structure is expanded;
wherein at least two of the plurality of induction coils are positioned at least partially orthogonally relative to each other; and
wherein each induction coil includes a laminar construction and is configured to be electrically insulated from one or more at least partially overlapping adjacent laminae, and electrically insulated from the expandable mechanical structure.
4. The apparatus of claim 3 , including a control circuit within a lumen of the wireless stent electrode assembly.
5. The apparatus of claim 4 , wherein the control circuit includes a rectifier circuit coupled to one or more of the induction coils, the rectifier circuit configured to rectify the magnetically-coupled energy received by the one or more of the induction coils.
6. The apparatus of claim 3 , wherein at least three of the induction coils are positioned orthogonally relative to each other.
7. The apparatus of claim 3 wherein at least two of the induction coils are positioned radially relative the longitudinal axis of the stent.
8. An apparatus, comprising:
a plurality of intravascularly-deliverable stent electrode assemblies, each including an expandable mechanical structure and one or more electrostimulation electrodes;
a plurality of at least partially overlapping induction coils attached to at least one of the expandable mechanical structures, and electrically insulated from the expandable mechanical structure, and from each other, the one or more induction coils configured to receive magnetically-coupled energy;
wherein the one or more electrostimulation electrodes are configured to respectively deliver at least some of the received magnetically-coupled energy as an electrostimulation to one or more tissue sites;
wherein the one or more induction coils are deformable and configured to open when a corresponding expandable mechanical structure is expanded;
wherein the one or more induction coils are positioned orthogonally relatively to each other; and
wherein each induction coil includes a laminar construction and is configured to be electrically insulated from one or more at least partially overlapping adjacent laminae, and electrically insulated from the expandable mechanical structure.
9. The apparatus of claim 8 , wherein at least one of the one or more electrostimulation electrodes comprises a first electrostimulation electrode configured to at least partially encircle a first expandable mechanical structure and wherein the electrostimulation is delivered between a first stent electrode assembly including the first electrode and a second stent electrode assembly including a second electrode.
10. The apparatus of claim 8 , wherein at least one of the one or more electrostimulation electrodes extends from an end of at least one of the one or more induction coils.
11. The apparatus of claim 8 , including a control circuit including an energy storage device, the energy storage device configured to store at least some of the magnetically-coupled energy received by at least one of the one or more induction coils, the energy storage device electrically connected to at least one of the one or more electrostimulation electrodes, and the energy storage device configured to supply the one or more electrostimulation electrodes with enough stored energy to deliver an electrostimulation to one or more tissue sites.
12. The apparatus of claim 8 , wherein at least one of the one or more electrostimulation electrodes comprises a ring electrode that at least partially encircles a corresponding expandable mechanical structure.
13. The apparatus of claim 1 , comprising a control circuit comprising an energy storage device electrically connected to the one or more induction coils, the energy storage device configured to store at least some of the magnetically-coupled energy, the control circuit configured to controllably adjust one or more electrostimulation parameters selected from a list including a pulse duration, a pulse timing, a pulse amplitude, or a pulse shape.
14. The apparatus of claim 1 , wherein the elongate body is concentric with the expandable mechanical structure.