摘要:
A neuromodulation system configured for providing sub-threshold neuromodulation therapy to a patient. The neuromodulation system comprises a neuromodulation lead having at least one electrode configured for being implanted along a spinal cord of a patient, a plurality of electrical terminals configured for being respectively coupled to the at least one electrode, modulation output circuitry configured for delivering sub-threshold modulation energy to active ones of the at least one electrode, and control/processing circuitry configured for selecting a percentage from a plurality of percentages based on a known longitudinal location of the neuromodulation lead relative to the spinal cord, computing an amplitude value as a function of the selected percentage, and controlling the modulation output circuitry to deliver sub-threshold modulation energy to the patient at the computed amplitude value.
摘要:
A neuromodulation system configured for providing sub-threshold neuromodulation therapy to a patient. The neuromodulation system comprises a neuromodulation lead having at least one electrode configured for being implanted along a spinal cord of a patient, a plurality of electrical terminals configured for being respectively coupled to the at least one electrode, modulation output circuitry configured for delivering sub-threshold modulation energy to active ones of the at least one electrode, and control/processing circuitry configured for selecting a percentage from a plurality of percentages based on a known longitudinal location of the neuromodulation lead relative to the spinal cord, computing an amplitude value as a function of the selected percentage, and controlling the modulation output circuitry to deliver sub-threshold modulation energy to the patient at the computed amplitude value.
摘要:
The present invention relates to an implantable stimulator device comprising a plurality of first electrodes and a plurality of second electrodes configured to provide stimulation to a patient's tissue, comprising a first integrated circuit comprising a first stimulation circuitry block for controlling stimulation of the plurality of first electrodes, a second integrated circuit comprising a second stimulation circuitry block for controlling stimulation of the plurality of first electrodes, wherein the first and second integrated circuits are similarly constructed, and a controller for controlling the first and second integrated circuits.
摘要:
An implantable microstimulator (10) configured to be implanted for tissue stimulation employs a self-contained power source (16) and a bi-directional RF telemetry link (48) for allowing data-containing signals to be sent to and from the implantable microstimulator (10) from at least two external devices (39,40). Further, a separate electromagnetic inductive telemetry link (38) allows data containing signals to be sent to the implantable microstimulator from at least one of the two external devices (39). The RF bidirectional telemetry link (48) allows the microstimulator to inform the patient or clinician regarding the status of the microstimulator device, including the charge level of a power source, and stimulation parameter states. The invention concerns a method for controlling an implantable medical device (10), the device having telemetry circuitry to receive both a first type of telemetry and to receive a second type of telemetry, the method comprising: listening for the first and second telemetry types; monitoring a voltage of a power source (16) within the implantable medical device; and if the voltage falls below a first threshold, discontinuing listening for the first telemetry type while continuing listening for the second telemetry type.
摘要:
The present invention relates to a neuromodulation system comprising an external control device for programming an implantable neuromodulator coupled to an electrode array implanted within a patient, the external control device comprising: a user interface; telemetry circuitry configured for communicating with the neuromodulator; and controller/processor circuitry configured for, in response to input into the user interface, directing the neuromodulator via the telemetry circuitry to deliver super-threshold electrical modulation energy in accordance with a super-threshold modulation parameter set, and sub-threshold electrical modulation energy in accordance with a sub-threshold modulation parameter set, wherein the super-threshold modulation parameter set and the sub-threshold modulation parameter set are contained in a hybrid modulation program.
摘要:
An implantable microstimulator (10) configured to be implanted for tissue stimulation employs a self-contained power source (16) and a bi-directional RF telemetry link (48) for allowing data-containing signals to be sent to and from the implantable microstimulator (10) from at least two external devices (39,40). Further, a separate electromagnetic inductive telemetry link (38) allows data containing signals to be sent to the implantable microstimulator from at least one of the two external devices (39). The implantable microstimulator, comprises: an hermetically-sealed housing (213); a first electrode (22) and a second electrode (24) for stimulating tissue, each electrode external to the hermetically-sealed housing; an antenna (18) within the hermetically-sealed housing; and telemetry circuitry coupled to the antenna for receiving data-containing signals from at least one external device (39,40,60), said telemetry circuitry comprising: a first telemetry receiver for receiving data in accordance with a first telemetry scheme, and a second telemetry receiver for receiving data in accordance with a second telemetry scheme.
摘要:
An improved external charger for a battery in an implantable medical device (implant), and technique for charging batteries in multiple implants using such improved external charger, is disclosed. During charging, values for a parameter measured in the implants are reported from the implants to the external charger. The external charger infers from the magnitudes of the parameters which of the implants has the highest and lowest coupling to the external charger, and so designates those implants as "hot" and "cold." The intensity of the magnetic charging field is optimized for the cold implant consistent with the simulation to ensure that that the cold implant is charged with a maximum (fastest) battery charging current.; The duty cycle of the magnetic charging field is also optimized for the hot implant consistent with the simulation to ensure that the hot implant does not exceed the power dissipation limit. As a result, charging is optimized to be fast for all of the implants, while still safe from a tissue heating perspective.
摘要:
Battery management circuitry for an implantable medical device such as an implantable neurostimulator is described. The circuitry has a T-shape with respect to the battery terminal, with charging circuitry coupled between rectifier circuitry and the battery terminal on one side of the T, and load isolation circuitry coupled between the load and the battery terminal on the other side. The load isolation circuitry can comprise two switches wired in parallel. An undervoltage fault condition opens both switches to isolate the battery terminal from the load to prevent further dissipation of the battery. Other fault conditions will open only one the switches leaving the other closed to allow for reduced power to the load to continue implant operations albeit at safer low-power levels. The battery management circuitry can be fixed in a particular location on an integrated circuit which also includes for example the stimulation circuitry for the electrodes.