Percutaneous neurostimulator for modulating cardiovascular function
A neurostimulation device includes an external neurostimulator worn by a patient using a bracing element that braces a portion of the patient's body. The external neurostimulator delivers neurostimulation to modulate a cardiovascular function of the patient. In one embodiment, the external stimulator delivers neurostimulation percutaneously to a stimulation target in the patient's body using at least one percutaneous stimulation electrode having a distal end lodged on or near the stimulation target.
1. A system for percutaneous neurostimulation to modulate a cardiovascular function in a body, the system comprising:
a percutaneous neurostimulation device including:
at least one percutaneous stimulation electrode configured to lodge in a stimulation site in the body;
an external neurostimulator configured to deliver neurostimulation percutaneously to a stimulation target in the body through the at least one percutaneous stimulation electrode, the external neurostimulator including:
a stimulation output circuit directly coupled to the at least one percutaneous stimulation electrode, the stimulation output circuit configured to deliver the neurostimulation;
a memory circuit configured to store a stimulation algorithm including parameters selected to modulate the cardiovascular function; and
a stimulation controller coupled to the stimulation output circuit, the stimulation controller configured to control the delivery of neurostimulation by executing the stimulation algorithm, the stimulation controller including a feedback controller configured to control the delivery of neurostimulation using a feedback control signal; and
a stimulator telemetry circuit configured to receive the feedback control signal via telemetry;
a bracing element coupled to the external neurostimulator, the bracing element configured to brace a portion of the body to hold the external neurostimulator on a first surface location of the body;
a button directly connected to the at least one percutaneous stimulation electrode and configured to be mounted on a second surface location of the body;
a connector configured to allow snap-on connection to the button; and
a lead directly connected between the external neurostimulator and the connector; and
an implantable medical device including:
a sensor configured to sense a physiologic signal;
a sensor processing circuit configured to produce the feedback control signal using the sensed physiologic signal; and
an implant telemetry circuit configured to transmit the feedback control signal to the external neurostimulator.
2. The system of claim 1 , wherein the at least one percutaneous electrode comprises a wire electrode including a wire having a proximal end directly coupled to the external neurostimulator and a distal end configured to lodge in the stimulation site in the body.
3. The system of claim 1 , wherein the percutaneous neurostimulation device comprises a lead and an implantable capsule having opposite ends, and the at least one percutaneous electrode is incorporated into one of the opposite ends and directly connected to the external neurostimulator through the lead.
4. The system of claim 3 , wherein the implantable capsule is configured to be implanted into the body by injection using a hollow needle or catheter.
5. The system of claim 3 , wherein the percutaneous neurostimulation device comprises a magnet coupled to the lead and configured to be attached onto a surface portion of the body over the capsule to prevent the capsule from drifting in the body.
6. The system of claim 1 , wherein the percutaneous neurostimulation device comprises a surface stimulation electrode configured to be placed on surface of the body, and the external neurostimulator is configured to deliver neurostimulation percutaneously to the stimulation target in the body through the at least one percutaneous stimulation electrode and the surface stimulation electrode.