Method for a controlled shutdown of an implantable medical device
First Claim
1. Shutdown circuitry for an implantable medical device, comprising:
- a sensor for producing a sensor output upon wirelessly detecting a shutdown signal from a source external to the implantable medical device;
a delay circuit for receiving the sensor output, and for producing a delayed sensor output a delay time later after receiving the sensor output;
a processor, wherein the processor initiates a shutdown routine upon receipt of the sensor output; and
a switch, wherein the switch disconnects a power supply from the processor upon receipt of the delayed sensor output.
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Accused Products
Abstract
An improved implantable pulse generator (IPG) containing graceful shutdown circuitry is disclosed. A magnet sensor senses the presence of an emergency shutdown magnet. Output of the magnet sensor is conditioned by a signal conditioning circuit. Output of the signal conditioning circuit is delayed by a delay element before being fed to a power cut-off switch, which cuts-off power to the IPG circuitry. An interrupt signal is routed from before the delay element to the IPG processor as an indicator of imminent shutdown. The processor launches shutdown routine that carries out shutdown operations such as logging the emergency shutdown event, saving and closing open files, saving data from volatile memory to non-volatile memory, etc., before the power cut-off switch is activated upon elapsing of delay provided by the delay element. The magnet sensor, signal conditioning circuit, and delay element are powered separately from the rest of the circuitry of the IPG.
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Citations
20 Claims
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1. Shutdown circuitry for an implantable medical device, comprising:
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a sensor for producing a sensor output upon wirelessly detecting a shutdown signal from a source external to the implantable medical device; a delay circuit for receiving the sensor output, and for producing a delayed sensor output a delay time later after receiving the sensor output; a processor, wherein the processor initiates a shutdown routine upon receipt of the sensor output; and a switch, wherein the switch disconnects a power supply from the processor upon receipt of the delayed sensor output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for shutting down an implantable medical device, comprising:
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wirelessly receiving at the implantable medical device a shutdown signal from a source external to the implantable medical device; creating a delayed shutdown signal from the received shutdown signal, wherein the delayed shutdown signal is delayed by a delay time; initiating a shutdown routine in the implantable medical device upon receipt of the received shutdown signal; and decoupling the implantable medical device from a power supply upon receipt of the delayed shutdown signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification