System and method for facilitating sensor and monitor communication

• US 9,693,718 B2
• Filed: 02/03/2015
• Issued: 07/04/2017
• Est. Priority Date: 03/31/2008
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Boyce, Robin, Nordstrom, Brad, Ravid, Arie, Wang, Hui
• Primary Examiner(s): Stout, Michael C
• Application Number:
  US14/613,142
• Publication Number:
  US 20150150495A1
• Time in Patent Office: 882 Days
• Field of Search: 600310-344
• CPC Class Codes: A61B 2562/085 combined with means for recording calibration data
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/01 Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue clinical contact thermometers G01K13/20
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/1495 Calibrating or testing of in-vivo probes
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/6838 Clamps or clips
• CPC Class Codes: A61B 5/7232 involving compression of the physiological signal, e.g. to extend the signal recording period
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence

Abstract

Embodiments disclosed herein may include an adapter which is capable of converting signals from an oximeter sensor such that the signals are readable by an oximeter monitor. In an embodiment, the adapter is capable of converting signals relating to calibration information from the oximeter sensor. The calibration information may relate to wavelengths of light emitting diodes within the oximeter sensor. In a specific embodiment, the adapter will convert wavelength calibration information in a first form relating to data values stored in a digital memory chip to a second form relating to a resistance value of an expected resistor within the oximeter sensor.

Claims

1. An adapter, comprising:

communications circuitry configured to facilitate communication with an oximeter sensor and an oximeter monitor; and

circuitry configured to identify the presence of a digital memory chip in the oximeter sensor by attempting to access a particular value expected from the digital memory chip and determining whether the expected value is returned, to use calibration information received from the oximeter sensor to modify signals received from a photo detector within the oximeter sensor if the expected value is returned, and to utilize a lookup table stored within a memory of the adapter to determine appropriate calibration information for the oximeter sensor and to use the determined appropriate calibration information to modify signals received from the photo detector within the oximeter sensor if the expected value is not returned, and to provide, via the communications circuitry, the modified signals to the oximeter monitor to enable the oximeter monitor to display information related to a physiological parameter value of a patient coupled to the oximeter sensor.

2. The adapter of claim 1, wherein the adapter is configured to wirelessly communicate, via the communication circuitry, with the oximeter sensor, the oximeter monitor, or both.

3. The adapter of claim 1, wherein the adapter comprises an independent power source.

4. The adapter of claim 1, wherein the adapter comprises an adapter body disposed on an adapter cable having an adapter-to-oximeter monitor connecting plug and an adapter-to-oximeter sensor connecting plug.

12. The adapter of claim 1, wherein the circuitry is configured to use the calibration information or the determined appropriate calibration information to process the signals to determine the physiological parameter value, and the modified signals provided to the oximeter monitor comprise the determined physiological parameter value.

13. The adapter of claim 12, wherein the adapter is configured to store the determined physiological parameter value on the memory.

14. The adapter of claim 12, wherein the determined physiological parameter value comprises temperature, heart rate, or oxygen saturation.

15. The adapter of claim 1, wherein the lookup table relates resistance values to calibration curves.

16. The adapter of claim 1, wherein the appropriate calibration information is a calibration curve.

17. The adapter of claim 1, wherein the adapter is configured to connect to the oximeter sensor via an adapter cable and an adapter-to-sensor connecting plug and the adapter is configured to connect to the oximeter monitor via the adapter cable and an adapter-to-monitor connecting plug.

5. A pulse oximetry system, comprising:

an oximeter sensor comprising at least one photo detector; and

an adapter configured to;

couple the oximeter sensor to an oximeter monitor;

receive a resistance value indicative of a wavelength of light emitted by an emitter of the oximeter sensor from the oximeter sensor;

access a lookup table that relates resistance values to calibration curves, wherein the lookup table is stored within a memory of the adapter;

compare the received resistance value to the resistance values in the lookup table to convert the received resistance value to an appropriate calibration curve;

receive signals detected by at least one photo detector within the oximeter sensor;

modify signals received from the photo detector using the appropriate calibration curve; and

provide the modified signals to the oximeter monitor to enable the oximeter monitor to display information related to a physiological parameter value of a patient coupled to the oximeter sensor.

6. The system of claim 5, wherein the adapter comprises an independent power source.

7. The system of claim 5, wherein the adapter is configured to wirelessly communicate with the oximeter sensor, the oximeter monitor, or both.

8. The system of claim 5, wherein the adapter comprises an adapter body disposed on an adapter cable having an adapter-to-oximeter monitor connecting plug and an adapter-to-oximeter sensor connecting plug.

18. The system of claim 5, wherein the adapter is configured to use the appropriate calibration curve to process the signals to determine the physiological parameter value, and the modified signals provided to the oximeter monitor comprise the determined physiological parameter value.

19. The system of claim 5, wherein the adapter is configured to connect to the oximeter sensor via an adapter cable and an adapter-to-sensor connecting plug and the adapter is configured to connect to the oximeter monitor via the adapter cable and an adapter-to-monitor connecting plug.

9. A method of processing data obtained by an oximeter sensor, the method comprising:

utilizing circuitry of an adapter configured to wirelessly couple the oximeter sensor to an oximeter monitor to;

wirelessly receive from the oximeter sensor information related to a wavelength of light emitted by an emitter of the oximeter sensor;

wirelessly receive from the oximeter sensor signals detected by at least one photo detector within the oximeter sensor;

modify the received signals based on the received information; and

wirelessly provide the modified signals to the oximeter monitor to enable the oximeter monitor to display information related to a physiological parameter value of a patient coupled to the oximeter sensor.

10. The method of claim 9, comprising utilizing the circuitry of the adapter to identify the presence of a digital memory chip in the oximeter sensor, and if the digital memory chip is identified, receiving the information related to the wavelength of light emitted by the emitter of the oximeter sensor from the digital memory chip and using the information to modify the received signals.

11. The method of claim 10, wherein to identify the presence of the digital memory chip the circuitry attempts to access a particular value expected from the digital memory chip and determines whether the expected value is returned.

20. The method of claim 9, wherein utilizing circuitry of the adapter to modify the received signals comprises utilizing the circuitry of the adapter to process the received signals to determine the physiological parameter value, and utilizing circuitry of the adapter to wirelessly provide the modified signals to the oximeter monitor comprises utilizing the circuitry of the adapter to wirelessly provide the physiological parameter value of the patient.

21. The method of claim 9, comprising utilizing the circuitry of the adapter to wirelessly interrogate the oximeter monitor to obtain information related to the oximeter monitor and modify the received signals based on the information related to the oximeter monitor.

22. The method of claim 9, wherein the received information comprises a calibration curve.