Medical device identifier

• US 9,649,165 B2
• Filed: 07/15/2013
• Issued: 05/16/2017
• Est. Priority Date: 07/16/2012
• Status: Active Grant

• Current Assignee: Cardiac Innovation, LLC, Board of Regents of the University of Texas System (University of Texas System)
• Original Assignee: Cardiac Innovation, LLC, Board of Regents of the University of Texas System (University of Texas System)
• Inventors: Horton, Rodney P., Valvano, Jonathan Walker, Pearce, John Anthony
• Primary Examiner(s): COSIMANO, EDWARD R
• Application Number:
  US13/942,465
• Publication Number:
  US 20140019076A1
• Time in Patent Office: 1,401 Days
• Field of Search: None
• CPC Class Codes: A61B 1/00112 Connection or coupling means
• CPC Class Codes: A61B 2562/08 Sensors provided with means for identification, e.g. barcodes or memory chips
• CPC Class Codes: A61B 5/00 Measuring for diagnostic purposes radiation diagnosis A61B6/00; diagnosis by ultrasonic, sonic or infrasonic waves A61B8/00; Identification of persons
• CPC Class Codes: A61B 5/74 Details of notification to user or communication with user or patient indicating measured values G01D7/00; user input means input or output arrangements for computers G06F3/00
• CPC Class Codes: A61B 90/90 Identification means for patients or instruments, e.g. tags
• CPC Class Codes: A61N 1/3718 Monitoring of or protection against external electromagnetic fields or currents
• CPC Class Codes: A61N 1/37235 Aspects of the external programmer
• CPC Class Codes: A61N 1/3727 characterised by the modulation technique
• CPC Class Codes: A61N 1/37288 Communication to several implantable medical devices within one patient
• CPC Class Codes: G06F 17/40 Data acquisition and logging for input to computer G06F3/00
• CPC Class Codes: G16H 20/30 relating to physical therapies or activities, e.g. physiotherapy, acupressure or exercising
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16H 40/67 for remote operation
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass
• CPC Class Codes: H03M 3/00 Conversion of analogue values to or from differential modulation
• CPC Class Codes: H04B 1/401 for selecting or indicating operating mode
• CPC Class Codes: H04L 13/02 Details not particular to receiver or transmitter
• CPC Class Codes: H04M 3/00 Automatic or semi-automatic exchanges

Abstract

A medical device identifier can identify an implanted medical device. In one example arrangement, the medical device identifier sends electromagnetic signals to the implanted device according to one or more stored digitized waveforms. The device then senses any returned electromagnetic signals, and identifies the implanted device based on the returned electromagnetic signals. The medical device identifier may generate the electromagnetic signals from the stored digitized waveforms using an analog-to-digital converter, and may compare the returned electromagnetic signals with one or more stored digital templates corresponding to different device manufacturers. The comparison may be performed using cross correlation. In another aspect, a portal device includes an identification subsystem for identifying the provider of a medical device, and a communication subsystem for establishing two-way communication a call center servicing medical devices from an identified provider. The portal device may relay information between the medical device and the identified provider.

Claims

1. A medical device identifier, comprising:

a coil;

a computer subsystem comprising a processor and memory, the memory holding instructions executable by the processor and also holding a plurality of digitized waveforms;

a digital-to-analog converter coupled to the processor;

drive circuitry coupled to the coil and the digital-to-analog converter; and

receiver circuitry coupled to the coil and the computer subsystem;

wherein the instructions, when executed by the processor, cause the medical device identifier to;

sequentially excite the coil, via the digital-to-analog converter and the drive circuitry, to generate electromagnetic waveforms corresponding to one or more of the digitized waveforms;

receive and digitize, via the coil and the receiver circuitry, a returned electromagnetic waveform transmitted from a medical device in response to the electromagnetic waveforms generated by the medical device identifier; and

identify the medical device based on the digitized returned electromagnetic waveform, wherein the memory further holds a plurality of digital templates corresponding to different medical devices, and wherein the instructions, when executed by the processor, cause the medical device identifier to identify the medical device based on a comparison of the digitized returned electromagnetic waveform with the plurality of digital templates.

2. The medical device identifier of claim 1, wherein the comparison of the digitized returned electromagnetic waveform with a respective one of the digital templates comprises a cross-correlation of the digitized returned electromagnetic waveform with the respective digital template.

3. The medical device identifier of claim 1, wherein the instructions, when executed by the processor, cause the medical device identifier to, for each respective electromagnetic waveform generated, place the coil in a receive mode and digitize the output of the coil, wherein for a particular one of the generated electromagnetic waveforms the digitized output of the coil is the digitized returned electromagnetic waveform.

4. The medical device identifier of claim 1, wherein the instructions, when executed by the processor, cause the medical device identifier to:

compare the digitized returned electromagnetic waveform with at least two of the plurality of digital templates; and

identify the medical device based on the template best matching the digitized returned electromagnetic waveform.

5. The medical device identifier of claim 4, wherein the medical device identifier further produces a constant magnetic field to attempt to prompt a response from the medical device.

6. A medical device identifier, comprising:

a coil;

a computer subsystem comprising a processor and memory, the memory holding instructions executable by the processor and holding a plurality of digital templates corresponding to different medical devices;

drive circuitry coupled to the coil and the computer subsystem; and

receiver circuitry coupled to the coil and the computer subsystem;

wherein the instructions, when executed by the processor, cause the medical device identifier to;

sequentially excite the coil via the drive circuitry to generate electromagnetic waveforms corresponding to a plurality of digitally predefined waveforms;

receive and digitize via the coil and the receiver circuitry a returned electromagnetic waveform transmitted from a medical device in response to the electromagnetic waveforms; and

perform a cross correlation of the digitized returned electromagnetic wave form with at least one of the plurality of digital templates.

7. The medical device identifier of claim 6, wherein the instructions, when executed by the processor, cause the medical device identifier to:

perform a cross correlation of the digitized electromagnetic wave form with each of at least two of the templates; and

identify the medical device based on the template best matching the digitized returned electromagnetic waveform as determined by the cross correlations.

8. The medical device identifier of claim 6, wherein the instructions, when executed by the processor, cause the medical device identifier to, for each respective electromagnetic waveform generated, place the coil in a receive mode and digitize the output of the coil, wherein for a particular one of the generated electromagnetic waveforms the digitized output of the coil is the digitized returned electromagnetic waveform.

9. A medical device identifier, comprising:

a housing;

a printed circuit board within the housing;

control electronics mounted on the printed circuit board; and

a coil positioned away from the printed circuit board and coupled to the printed circuit board for generating a sequence of electromagnetic waveforms to prompt a return signal from a medical device;

wherein the control electronics identifies the medical device based on the return signal, and wherein the control electronics further comprise;

a computer subsystem comprising a processor and memory, the memory holding instructions executable by the processor and holding a plurality of digital templates corresponding to different medical devices;

drive circuitry coupled to the coil and the computer subsystem; and

receiver circuitry coupled to the coil and the computer subsystem;

wherein the instructions, when executed by the processor, cause the medical device identifier to;

sequentially excite the coil via the drive circuitry to generate electromagnetic waveforms corresponding to a plurality of digitally predefined waveforms;

receive and digitize via the coil and the receiver circuitry a returned electromagnetic waveform transmitted from a medical device in response to the electromagnetic waveforms; and

perform a cross correlation of the digitized returned electromagnetic wave form with at least one of the plurality of digital templates.

10. The medical device identifier of claim 9, wherein the coil is coupled to the printed circuit board via a cable.

11. The medical device identifier of claim 9, wherein the coil is mounted in a portion that extends from the housing.

12. The medical device identifier of claim 9, wherein the instructions, when executed by the processor, cause the medical device identifier to:

perform a cross correlation of the digitized electromagnetic wave form with each of at least two of the templates; and

identify the medical device based on the template best matching the digitized returned electromagnetic waveform as determined by the cross correlations.

13. The medical device identifier of claim 9, wherein the control electronics further comprise a digital-to-analog converter, and wherein the generated electromagnetic waveforms are generated in part by supplying the digitally predefined waveforms to the digital-to-analog converter.

14. A portal device, comprising:

a device identification subsystem configured to identify, from a plurality of possible providers, the provider of a medical device that is in proximity to the portal device; and

a communication subsystem configured to establish two-way communication over an electronic link with a call center servicing medical devices from the identified provider;

wherein the portal device is operable to receive electromagnetic signals from the medical device, to forward to the call center information based on the electromagnetic signals received from the medical device, to receive communications from the call center carrying information to be transmitted to the medical device, and to transmit further electromagnetic signals to the medical device based on the communications received from the call center.

15. The portal device of claim 14, further comprising a plurality of translation modules corresponding respectively to the plurality of possible providers.

16. The portal device of claim 15, wherein each translation module is provided by its respective one of the plurality of possible providers.

17. The portal device of claim 14, wherein the device identification subsystem further comprises:

a coil;

a computer subsystem comprising a processor and memory, the memory holding instructions executable by the processor and holding a plurality of digital templates corresponding to different medical devices;

drive circuitry coupled to the coil and the computer subsystem; and

receiver circuitry coupled to the coil and the computer subsystem;

wherein the instructions, when executed by the processor, cause the medical device identifier to;

sequentially excite the coil via the drive circuitry to generate electromagnetic waveforms corresponding to a plurality of digitally predefined waveforms;

receive and digitize via the coil and the receiver circuitry a returned electromagnetic waveform transmitted from a medical device in response to the electromagnetic waveforms; and

identify the provider of the medical device based on a comparison of the returned electromagnetic waveform with at least one of the plurality of digital templates.

18. The portal device of claim 17, wherein the device identification subsystem further comprises a digital-to-analog converter, and wherein the generated electromagnetic waveforms are generated in part by supplying the digitally predefined waveforms to the digital-to-analog converter.