Method and apparatus for neuromodulation treatments of pain and other conditions
Systems, devices, and methods for neurostimulation using a combination of implantable and external devices to treat pain are disclosed.
1. An apparatus for delivering stimulation energy to tissue, comprising:
an implantable device comprising an implantable energy storage element and at least one implantable antenna, the implantable device configured to deliver stimulation energy to tissue;
an external device comprising an external antenna, the external device configured to transmit power and data to the implantable device via a wireless link;
wherein the apparatus is configured to reduce a power level of the external device transmissions until a discharge rate of the implantable energy storage element is faster than the charge rate of the implantable energy storage element.
2. The apparatus according to claim 1 , wherein the apparatus is further configured to assess at least one of relative wireless link quality information or absolute wireless quality link information.
3. The apparatus according to claim 1 , wherein a quality of the wireless link is adjustable by a user adjusting external antenna orientation.
4. The apparatus according to claim 1 , wherein a quality of the wireless link is adjustable by adjusting a parameter selected from the group consisting of: external device antenna position; external device output power level; external device operating frequency; parameter of an impedance matching network; and combinations thereof.
5. The apparatus according to claim 1 , wherein the apparatus is further configured to notify the external device when the implantable device has received sufficient power to turn on.
6. The apparatus according to claim 1 , wherein the apparatus is further configured to adjust the power level of the external device transmissions to the implantable device.
7. The apparatus according to claim 6 , wherein the apparatus is configured to increase the power level of the external device transmissions during an assessment of the quality of the wireless link.
8. The apparatus according to claim 7 , wherein increasing the power level increases speed of the assessment of the quality of the wireless link.
9. The apparatus according to claim 6 , wherein the apparatus is configured to adjust the power level based on a parameter selected from the group consisting of: a stimulation therapy parameter; charge rate of the implantable energy storage element; discharge rate of the implantable energy storage element; and combinations thereof.
10. The apparatus according to claim 6 , wherein the apparatus is configured to adjust the power level during an event selected from the group consisting of: event in which patient physical activity varies; event in which environmental conditions change; event in which wireless link gain changes; and combinations thereof.
11. The apparatus according to claim 6 , wherein the apparatus is configured to adjust the power level during data transmission and/or reception phases.
12. The apparatus according to claim 6 , wherein the adjusting of the power level can comprise bursts of power delivered by the external device to charge the implantable energy storage element.
13. The apparatus according to claim 1 , wherein the apparatus is further configured to prevent unintended operation by monitoring a parameter selected from the group consisting of: a therapy parameter; a wireless data link parameter; wireless power link parameter; a sensing circuitry parameter; an antenna parameter; an impedance parameter; and combinations thereof.
14. The apparatus according to claim 1 , wherein the apparatus is further configured to maximize quality of the wireless link.
15. The apparatus according to claim 1 , wherein the apparatus further comprises a safety protocol and a kill switch, wherein the apparatus is further configured to shut down and notify a user if an undesired condition is detected.
16. The apparatus according to claim 15 , wherein the safety protocol is configured to monitor a parameter selected from the group consisting of: temperature of the apparatus; temperature of the external device; a wireless power link parameter; impedance mismatch; electric current draw; bit error rate; antenna failure; reflection coefficient; standing wave ratio; and combinations thereof.
17. The apparatus according to claim 16 , wherein the apparatus is configured to perform a calibration of an undesired condition if determined by the safety protocol.
18. The apparatus according to claim 1 , wherein the external device is configured to deliver power at a first power level during stimulation and a second power level during an assessment of the quality of the wireless link, and wherein the second power level is higher than the first power level.
19. The apparatus according to claim 1 , wherein the external device comprises an adhesive layer, and wherein the adhesive layer is a configured to adhesively attach to patient skin at a location over the implantable device.
20. The apparatus according to claim 1 , wherein the implantable device comprises a shunting network, and wherein the implantable device is configured to discharge the implantable energy storage element via the shunting network based on a command from the external device.
21. The apparatus according to claim 1 , wherein the implantable energy storage element comprises at least one of a battery or a capacitor.