PHYSIOLOGICAL PARAMETER SYSTEM

• US 20080188733A1
• Filed: 12/21/2007
• Published: 08/07/2008
• Est. Priority Date: 12/22/2006
• Status: Active Grant

• Current Assignee: Masimo Corporation
• Original Assignee: JP Morgan Chase Bank, N.A. (JP Morgan Chase & Co)
• Inventors: Al-Ali, Ammar, Kiani, Massi E., Graybeal, John, Kilpatrick, Chris, Petterson, Michael
• Granted Patent: US 8,852,094 B2
• Time in Patent Office: Days
• US Class Current: 600/364
• CPC Class Codes: A61B 2560/0285 Apparatus for single use
• CPC Class Codes: A61B 2560/0443 Modular apparatus
• CPC Class Codes: A61B 2562/222 Electrical cables or leads therefor, e.g. coaxial cables or ribbon cables
• CPC Class Codes: A61B 5/0004 characterised by the type of physiological signal transmitted
• 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 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/024 Detecting, measuring or recording pulse rate or heart rate A61B5/0205, A61B5/021 take precedence
• CPC Class Codes: A61B 5/08 Detecting, measuring or recording devices for evaluating the respiratory organs A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61B 5/082 Evaluation by breath analysis, e.g. determination of the chemical composition of exhaled breath A61B5/083, A61B5/091 take precedence
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/14539 for measuring pH
• CPC Class Codes: A61B 5/14546 for measuring analytes not otherwise provided for, e.g. ions, cytochromes
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• 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 5/412 Detecting or monitoring sepsis
• CPC Class Codes: A61B 5/4839 combined with drug delivery
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/6832 : using adhesives A61B5/259 takes precedence
• CPC Class Codes: A61B 5/6838 : Clamps or clips
• CPC Class Codes: A61B 5/6843 : Monitoring or controlling sensor contact pressure
• CPC Class Codes: A61B 5/7221 : Determining signal validity, reliability or quality A61B5/7207 and A61B5/7217 take precedence
• CPC Class Codes: A61B 5/7246 : using correlation, e.g. template matching or determination of similarity
• 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 5/7282 : Event detection, e.g. detecting unique waveforms indicative of a medical condition A61B5/4094, A61B5/4818, A61B5/349, A61B5/0823 take precedence
• CPC Class Codes: A61B 5/7405 : using sound
• CPC Class Codes: A61B 5/742 : using visual displays A61B5/339 takes precedence
• CPC Class Codes: A61B 5/746 : Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms alarms per se G08B
• CPC Class Codes: G16H 40/63 : for local operation
• CPC Class Codes: G16H 50/30 : for calculating health indices; for individual health risk assessment

Abstract

A physiological parameter system has one or more parameter inputs responsive to one or more physiological sensors. The physiological parameter system may also have quality indicators relating to confidence in the parameter inputs. A processor is adapted to combine the parameter inputs, quality indicators and predetermined limits for the parameters inputs and quality indicators so as to generate alarm outputs or control outputs or both.

Claims

1. A method of detecting a physiological condition from trend data through a change in measurement site, the method comprising:

obtaining a measurement of a physiological parameter from a first measurement site of a patient;

obtaining a measurement of the physiological parameter from a second measurement site of the patient;

determining trend information of the physiological parameter from measurements at the first and second sites; and

determining a physiological condition based on the trend information.

2. The method of claim 1, wherein the physiological parameter comprises HbMet.

3. The method of claim 1, wherein the physiological condition comprises sepsis.

4. The method of claim 1, wherein the physiological condition comprises septic shock.

5. A method of measuring a physiological parameter in a physiological parameter system comprising:

obtaining measurements of a physiological parameter from a first measurement site of a patient;

determining a change in the measurement site of the patient;

obtaining a measurement of the physiological parameter from a second measurement site of the patient;

comparing the measurement of the physiological parameter at the second measurement site with the measurement from the first measurement site; and

calibrating the physiological parameter measurements at the second site with the physiological measurements at the first site.

6. The method of claim 5, wherein calibrating comprises adding an offset to the measurement of the physiological parameter at the second measurement site.

7. The method of claim 6, wherein the offset is calculated by subtracting the measurement of the physiological parameter at the second measurement site with the most recent physiological parameter measurement from the first site.

8. The method of claim 6, wherein the offset is calculated by subtracting the measurement of the physiological parameter at the second measurement site with a projection of the physiological parameter at the second measurement site extrapolated from a trend line fit to the physiological parameter measurements of the first site.

9. A system for calibrating physiological measurements from two different sites comprising:

a sensor configured to obtain an indication of a physiological condition at a measurement site and output said indication;

a processor configured to receive said indication and determine when a change in measurement sites from a first measurement site to a second measurement site occurs;

wherein the processor is further configured to adjust a measurement at the second site based on a measurement at the first site.

10. The system of claim 9, wherein the sensor comprises a MetHb sensor.

11. The system of claim 9, wherein the sensor comprises one or more of a COHb sensor, an SpO2 sensor, a blood pressure sensor, a respiratory sensor, and an ECG sensor.

12. A system for indicating a wellness state of a patient comprising:

a first sensor configured to measure a first physiological parameter and output an indication of the first physiological parameter;

a second sensor configured to measure a second physiological parameter different from said first physiological parameter and output an indication of the second physiological parameter; and

a processor which receives the outputs of the first and second sensor, determines an indication of wellness from the outputs, and outputs an indication of wellness to a display device.

13. The system of claim 12, wherein the first sensor and the second sensor comprises one or more of a pulse oximetry sensor, a blood pressure sensor, an ECG sensor, an acoustic sensor, or a capnographer.

14. A method of generating an indicator of patient wellness using a physiological parameter system comprising:

receiving physiological parameter data from a sensor attached to the physiological parameter system;

providing physiological parameter preferences to the physiological parameter system;

comparing the physiological parameter data to the physiological parameter preferences;

generating an indicator of patient wellness from the comparison.

15. The method of claim 14, wherein receiving physiological parameter data comprises receiving physiological parameter data indicative of a MetHB level.

16. The method of claim 14, wherein receiving physiological parameter data comprises receiving physiological parameter data indicative of a respiratory rate.

17. The method of claim 14, wherein receiving physiological parameter data comprises receiving physiological parameter data indicative of a CoHb level.

18. The method of claim 14, wherein receiving physiological parameter data comprises receiving physiological parameter data indicative of a total hemoglobin level.

19. The method of claim 14, wherein receiving physiological parameter data comprises receiving physiological parameter data indicative of a respiratory irregularity.

20. The method of claim 14, wherein receiving physiological parameter data comprises receiving physiological parameter data indicative of a blood pressure.

21. The method of claim 14, wherein receiving physiological parameter data comprises receiving physiological parameter data indicative of a glucose level.

22. The method of claim 14, wherein receiving physiological parameter data comprises receiving physiological parameter data indicative of a SpO2 level.