IMPLANTABLE PULSE GENERATOR THAT GENERATES SPINAL CORD STIMULATION SIGNALS FOR A HUMAN BODY
First Claim
Patent Images
1. A spinal cord stimulation system comprising:
- an external charger; and
an implantable pulse generator including a rechargeable battery configured to wirelessly couple to the external charger;
wherein the implantable pulse generator contains a voltage source, a current limiter, and an amplifier configured to charge the rechargeable battery based on power transmitted by the external charger; and
wherein the external charger is configured to provide an indication that proper alignment exists between the rechargeable battery and the external charger based upon a drop in an output voltage of the current limiter when the amplifier receives a maximum set current limit.
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Abstract
An implantable pulse generator (IPG) that generates spinal cord stimulation signals for a human body has a programmable signal generator that can generate the signals based on stored signal parameters without any intervention from a processor that controls the overall operation of the IPG. While the signal generator is generating the signals the processor can be in a standby mode to substantially save battery power. The IPG also contains circuitry to indicate to a patient that proper alignment exists between the IPG and an external charger to charge a battery in the IPG.
8 Citations
20 Claims
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1. A spinal cord stimulation system comprising:
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an external charger; and an implantable pulse generator including a rechargeable battery configured to wirelessly couple to the external charger; wherein the implantable pulse generator contains a voltage source, a current limiter, and an amplifier configured to charge the rechargeable battery based on power transmitted by the external charger; and wherein the external charger is configured to provide an indication that proper alignment exists between the rechargeable battery and the external charger based upon a drop in an output voltage of the current limiter when the amplifier receives a maximum set current limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A spinal cord stimulation system comprising:
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an external charger; and an implantable pulse generator including a rechargeable battery configured to wirelessly couple to the external charger; wherein the implantable pulse generator contains a voltage source, a current limiter, and an amplifier configured to charge the rechargeable battery based on power transmitted by the external charger; and wherein the external charger is configured to provide an indication that proper alignment exists between the rechargeable battery and the external charger based upon the current limiter determining that a maximum set current limit is received by the amplifier. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification