SYSTEM AND METHOD FOR COMMUNICATING WITH AN IMPLANT

• US 20110004076A1
• Filed: 01/30/2009
• Published: 01/06/2011
• Est. Priority Date: 02/01/2008
• Status: Abandoned Application

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Wilson, Darren James, Janna, Sied W., Taylor, Stephen Russell, Tegerdine, David Roger, Fell, Andrew Jon, Graham, Abi Claire
• Application Number:
  US12/865,657
• Publication Number:
  US 20110004076A1
• Time in Patent Office: Days
• US Class Current: 600/302
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/076 Permanent implantations telemetry using implanted circuitry A61B5/0031; implanted stimulators for therapy A61N1/3605, A61N1/362, A61N1/372
• CPC Class Codes: A61B 5/4504 Bones A61B5/4547 takes precedence
• CPC Class Codes: A61B 5/6878 Bone
• CPC Class Codes: A61F 2250/0002 for data transfer
• CPC Class Codes: H01Q 1/02 Arrangements for de-icing; Arrangements for drying-out ; Arrangements for cooling; Arrangements for preventing corrosion
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Abstract

A system and method for communicating with a medical implant is disclosed. The system (10,210,310,410) includes on-board electronics, a signal generator (15,215), an amplifier (16,216), a coil (14,214), a receiver (22,222), and a processor (20,220). The on-board electronics (100, 110) include a power harvester, a sensor, a microprocessor, and a data transmitter. The signal generator (15,215) generates a first signal, the amplifier (16,216) amplifies the first signal, the coil (14,214) transmits the amplified signal, the power harvester receives the first signal and transmits a data packet (18,218) containing data, the receiver (22,222) receives the data packet (18,218), and the processor (20,220) either processes the data or sends the data to a data storage device.

Claims

1. A system for communicating patient information, the system comprising:

a medical implant, the medical implant having a first cavity and a second cavity, the first and second cavity connected by one or more apertures, the first cavity is adapted to receive on-board electronics, the on-board electronics comprising at least one sensor, a microprocessor, and a data transmitter, and the second cavity is adapted to receive an implant antenna;

a signal generator adapted to generate a first signal;

an amplifier electrically connected to the signal generator;

at least one coil electrically connected to the amplifier;

a receiver adapted to receive a data packet having data from the implant antenna; and

a processor connected to the receiver;

wherein the signal generator generates the first signal, the amplifier amplifies the first signal, the at least one coil transmits the amplified signal, the implant antenna receives the first signal and transmits a data packet containing data, the receiver receives the data packet, and the processor processes the data or sends the data to a data storage device.

2. The system of claim 1, wherein the processor is selected from the group consisting of a desktop computer, a laptop computer, a personal data assistant, a mobile handheld device, and a dedicated device.

3. The system of claim 1, wherein the receiver is an antenna with an adapter for connection to the processor.

4. The system of claim 1, wherein the on-board electronics comprise a plurality of sensor assemblies and a multiplexer.

6. The system of any of claim 1, wherein there are two coils, and the coils are housed within a paddle.

7. The system of claim 1, further comprising a control unit, and wherein the signal generator and the amplifier are housed within the control unit.

10. The system of claim 1, wherein the first cavity and the second cavity are orthogonal to one another.

11. The system of claim 1, wherein the first cavity and the second cavity are diametrically opposed.

12. The system of claim 1, wherein at least one of the first cavity and the second cavity further comprise a cover.

13. The system of claim 1, wherein the on-board electronics comprise an LC circuit, a bridge rectifier, a storage capacitor, a wake up circuit, a microprocessor, an enable measurement switch, an amplifier, a Wheatstone bridge assembly, and a modulation switch.

15. The system of claim 13, wherein the modulation switch modulates a load signal.

16. The system of claim 15, wherein the load signal is modulated at a frequency between 5 kHz and 6 kHz.

5. (canceled)

8-9. -9. (canceled)

14. (canceled)

17. A method for communicating information from a medical device, the method comprising:

determining that a value of stored voltage in a communication system of a medical device exceeds a threshold wake-up voltage value;

enabling operation of a sensor device included in the medical device;

receiving a reading from the sensor device, the reading indicating one or more parameters associated with the medical device or a patient associated with the medical device;

forming a data packet including information representative of a received reading; and

wirelessly outputting the data packet.

18. The method of claim 17, further comprising determining that a value of stored voltage in the communications system no longer exceeds a threshold shut-down voltage and disabling one or more components of the communication system to prevent outputting data packets.

19. The method of claim 18, further comprising repeating receiving a reading, forming a data packet and wirelessly outputting the data packet until determining that the value of stored voltage no longer exceeds the threshold shut-down voltage.

20. The method of claim 17, further comprising receiving electrical energy from at least one of an energy scavenging device and an inductive coupling device, and storing the electrical energy in an electrical storage device of the communication system.

21. A medical implant, comprising:

a first cavity;

a second cavity, the second cavity connected by one or more apertures to the first cavity;

on-board electronics located in the first cavity, the on-board electronics comprising at least one sensor, a microprocessor, a data transmitter, an electrical energy storage device and a wake-up circuit; and

an antenna located in the second cavity and connected to the on-board electronics through the one or more apertures.

22. The implant of claim 21, further comprising an electrical energy scavenging device.

23. The implant of claim 21, further comprising a first cover, the first cover sealing the first cavity, and a second cover, the second cover sealing the second cavity, wherein the second cover includes a ceramic material.

24. The implant of claim 21, wherein the on-board electronics are configured to operate only when powered inductively from the antenna.