PHYSIOLOGICAL MONITOR CALIBRATION SYSTEM

• US 20120116175A1
• Filed: 10/15/2011
• Published: 05/10/2012
• Est. Priority Date: 05/15/2006
• Status: Active Grant

• Current Assignee: Cercacor Laboratories
• Original Assignee: Masimo Laboratories, Inc. (Masimo Corporation)
• Inventors: Al-Ali, Ammar, Kiani, Massi Joe E.
• Granted Patent: US 9,176,141 B2
• Time in Patent Office: Days
• US Class Current: 600/300
• CPC Class Codes: A61B 2560/0223 of calibration, e.g. protocols for calibrating sensors
• CPC Class Codes: A61B 2560/0228 using calibration standards
• CPC Class Codes: A61B 2562/0295 Strip shaped analyte sensors for apparatus classified in A61B5/145 or A61B5/157 disposable multilayered or laminated electrodes G01N27/307; details of handling chemical test elements G01N33/4875
• CPC Class Codes: A61B 5/0022 Monitoring a patient using a global network, e.g. telephone networks, internet
• CPC Class Codes: A61B 5/145 Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissuemeasuring of blood pressure or blood flow A61B5/02; non-radiation detecting or locating of foreign bodies in blood A61B5/06
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/14542 for measuring blood gases A61B5/14551 takes precedence
• CPC Class Codes: A61B 5/14546 for measuring analytes not otherwise provided for, e.g. ions, cytochromes
• CPC Class Codes: A61B 5/1459 invasive, e.g. introduced into the body by a catheter A61B5/1464 takes precedence
• CPC Class Codes: A61B 5/1495 Calibrating or testing of in-vivo probes
• CPC Class Codes: A61B 5/6801 specially adapted to be attached to or worn on the body surface
• CPC Class Codes: A61B 5/6846 specially adapted to be brought in contact with an internal body part, i.e. invasive
• CPC Class Codes: A61B 5/7275 Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence
• CPC Class Codes: A61B 5/7475 User input or interface means, e.g. keyboard, pointing device, joystick
• CPC Class Codes: G01N 33/66 involving blood sugars, e.g. galactose
• CPC Class Codes: G16H 40/40 for the management of medical equipment or devices, e.g. scheduling maintenance or upgrades
• CPC Class Codes: Y10T 436/144444 Glucose

Abstract

A calibration system is disclosed for calibrating a first physiological monitoring device using a second physiological monitoring device. The first physiological monitor measures a first indication of a physiological parameter. The second physiological monitor measures a second indication of the physiological parameter. The first and second indications are used to calibrate the first physiological monitoring device.

Claims

1. A method of calibrating a measurement device, the method comprising:

acquiring noninvasive physiological parameter measurements from a patient using a noninvasive device;

receiving an alternative physiological parameter measurement at the noninvasive device;

outputting a first trend graph of the noninvasive physiological parameter measurements for display; and

outputting a second trend graph that reflects a difference between the noninvasive physiological parameter measurements and the alternative physiological parameter measurement.

2. The method of claim 1, wherein the alternative physiological parameter measurement is an invasive measurement.

3. The method of claim 1, wherein the alternative physiological parameter measurement is a minimally-invasive measurement.

4. The method of claim 1, further comprising receiving a second alternative physiological parameter measurement.

5. The method of claim 4, further comprising adjusting the second trend graph to reflect a second difference between the noninvasive physiological parameter measurements and the second alternative physiological parameter measurement.

6. The method of claim 4, further comprising outputting a third trend graph to reflect a second difference between the noninvasive physiological parameter measurements and the second alternative physiological parameter measurement.

7. The method of claim 1, further comprising providing a user interface on the noninvasive device, the user interface configured to provide functionality for a user to input the alternative physiological parameter measurement.

8. The method of claim 1, wherein the noninvasive physiological parameter is hemoglobin.

9. A measurement device comprising:

a measurement module configured to obtain noninvasive physiological parameter measurements from a sensor coupled with a patient; and

a calibration module configured to;

receive an alternative physiological parameter measurement at the noninvasive device,

output a first trend graph of the noninvasive physiological parameter measurements for display, and

output a second trend graph that reflects a difference between the noninvasive physiological parameter measurements and the alternative physiological parameter measurement.

10. The measurement device of claim 9, wherein the calibration module is further configured to output a user interface control configured to provide functionality for a user to input the alternative physiological parameter measurement into the measurement device.

11. The measurement device of claim 9, wherein the calibration module is further configured to output a third trend graph in response to receiving a second alternative physiological parameter measurement.

12. The measurement device of claim 9, wherein the alternative physiological parameter measurement is an invasive measurement.

13. The measurement device of claim 9, wherein the alternative physiological parameter measurement is a minimally-invasive measurement.

14. The measurement device of claim 9, wherein the alternative physiological parameter measurement is a second noninvasive measurement from a second sensor.

15. A system for calibrating a measurement device, the system comprising:

a measurement module configured to receive a signal from a physiological sensor, obtain a noninvasive measurement of a physiological parameter responsive to the received signal, and output a value of the noninvasive measurement for presentation to a user; and

a calibration module configured to receive an input reflecting an invasive measurement value for the physiological parameter and to output an alternative value that reflects the invasive measurement value;

wherein at least the calibration module is implemented by one or more processors.

16. The system of claim 15, wherein the alternative value is an offset value comprising a difference between the noninvasive measurement value and the invasive measurement value.

17. The system of claim 16, wherein the calibration module is further configured to provide functionality for a user to input the offset value.

18. The system of claim 15, wherein the calibration module is further configured to provide functionality for a user to input the invasive measurement value.

19. The system of claim 15, wherein the calibration module is further configured to receive the invasive measurement value over a network.

20. The system of claim 15, wherein the calibration module is further configured to output an indication of an age of the alternative value.