TOTAL HEMOGLOBIN SCREENING SENSOR

• US 20190167161A1
• Filed: 02/05/2019
• Published: 06/06/2019
• Est. Priority Date: 09/04/2014
• Status: Active Grant

• Current Assignee: Masimo Corporation
• Original Assignee: Masimo Corporation
• Inventors: Al-Ali, Ammar, Indorf, Keith Ward
• Granted Patent: US 11,331,013 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 2560/0443 Modular apparatus
• CPC Class Codes: A61B 5/02055 Simultaneously evaluating both cardiovascular condition and temperature
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/7221 Determining signal validity, reliability or quality A61B5/7207 and A61B5/7217 take precedence
• 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 5/746 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 total hemoglobin index system derives total hemoglobin (tHb) index value utilizing a depopulated emitter with an index set of LEDs. A patient fails a tHb index test if tHb measurements are trending down and/or tHb values fall below a predefined index threshold. If a patient fails the tHb index test, a high resolution sensor derives a specific tHb measurement utilizing a high resolution set of LEDs. The number of high resolution set LEDs is greater than the number of index set LEDs.

Claims

1-17. -17. (canceled)

18. A physiological monitoring system for measuring total hemoglobin in a patient comprising:

a first optical sensor configured to measure a first total hemoglobin estimate, the first optical sensor including;

a first plurality of emitters configured to emit optical radiation comprising one or more wavelengths towards tissue at a tissue measurement site when the first optical sensor is in use, wherein pulsatile blood flows through the tissue of the patient at the tissue measurement site;

a first detector configured to detect the optical radiation emitted from the first plurality of emitters after attenuation by the pulsatile blood flowing through the tissue at the tissue measurement site when the first optical sensor is in use, the first detector further configured to output a first signal responsive to the detected, attenuated light after being emitted by the first plurality of emitters;

a second optical sensor configured to measure a second total hemoglobin estimate, the second optical sensor including;

a second plurality of emitters configured to emit optical radiation comprising one or more wavelengths towards the tissue at the tissue measurement site when the second optical sensor is in use; and

a second detector configured to detect the optical radiation emitted from the second plurality of emitters after attenuation by the pulsatile blood flowing through the tissue at the tissue measurement site when the second optical sensor is in use, the second detector further configured to output a second signal responsive to the detected, attenuated light after being emitted by the second plurality of emitters;

wherein the second plurality of emitters of the second optical sensor comprises more emitters than the first plurality of emitters in the first optical sensor;

a physiological monitor configured to communicate with the first optical sensor and the second optical sensor and receive at least one of the first signal responsive from the first optical sensor and the second signal from the second optical sensor, the physiological monitor further configured to provide an indication to measure the second total hemoglobin estimate with the second optical sensor if the first total hemoglobin estimate is below a predetermined threshold.

19. The system according to claim 18, wherein the first plurality of emitters of the first optical sensor comprise four LEDs and the second plurality of emitters of the second optical sensor comprise eight LEDs.

20. The system according to claim 19, wherein each of the four LEDs of the first optical sensor comprises a different wavelength selected from the group consisting of 660 nm, 905 nm, 1170 nm, and 1300 nm.

21. The system according to claim 18, wherein at least one of the first optical sensor and the second optical sensor comprise a sensor connector in electrical communications with the physiological monitor.

22. The system according to claim 18, wherein the tissue measurement site is located on a finger of the patient.

23. The system according to claim 22, wherein at least one of the first optical sensor and the second optical sensor comprise an adhesive butterfly wrap configured to secure to the finger of the patient when in use.

24. The system of claim 18, wherein the physiological monitor is further configured to generate a total hemoglobin index display comprising the first total hemoglobin estimate.

25. The system of claim 24, wherein the total hemoglobin index display of the physiological monitor has no time axis and comprises a vertical bar graph for indicating a range of relative total hemoglobin values.

26. The system of claim 25, wherein the total hemoglobin index display further comprises a pointer configured to move vertically so as to indicate a present total hemoglobin index value.

27. The system of claim 26, wherein the total hemoglobin index display further comprises a trend indicator.

28. A method for measuring total hemoglobin in a patient, the method comprising:

attaching a first optical sensor to the patient, the first optical sensor configured to measure a constituent of the patient'"'"'s blood, the first optical sensor comprising;

a first plurality of emitters configured to emit optical radiation comprising one or more wavelengths towards tissue at a tissue measurement site, wherein pulsatile blood flows through the tissue of the patient at the tissue measurement site; and

a first detector configured to detect the optical radiation emitted from the first plurality of emitters after attenuation by the pulsatile blood flowing through the tissue at the tissue measurement site, the first detector further configured to output a first signal responsive to the detected, attenuated light after being emitted by the first plurality of emitters;

measuring a first total hemoglobin estimate using the first optical sensor; and

if the first total hemoglobin estimate is below a predetermined threshold, replacing the first optical sensor with a second optical sensor and measuring a second total hemoglobin estimate with the second optical sensor, wherein the second optical sensor comprises;

a second plurality of emitters configured to emit optical radiation comprising one or more wavelengths towards the tissue at the tissue measurement site; and

a second detector configured to detect the optical radiation emitted from the second plurality of emitters after attenuation by the pulsatile blood flowing through the tissue at the tissue measurement site, the second detector further configured to output a second signal responsive to the detected, attenuated light after being emitted by the second plurality of emitters, the second plurality of emitters comprising more emitters than the first plurality of emitters in the first optical sensor.

29. The method according to claim 28, wherein measuring the first total hemoglobin estimate further comprises transmitting the first signal of the first optical sensor to a physiological monitor.

30. The method of claim 29, wherein at least one of the first optical sensor and the second optical sensor comprise a sensor connector in electrical communications with the physiological monitor.

31. The method according to claim 29, further comprising:

analyzing the first signal to determine a total hemoglobin trend; and

graphically showing the total hemoglobin trend on a display of the physiological monitor.

32. The method of claim 31, wherein the display of the physiological monitor has no time axis and comprises a vertical bar graph for indicating a range of relative total hemoglobin values.

33. The method of claim 32, wherein the display further comprises a pointer configured to move vertically so as to indicate a present total hemoglobin index value.

34. The method of claim 28, wherein the first plurality of emitters of the first optical sensor comprise four LEDs and the second plurality of emitters of the second optical sensor comprise eight LEDs.

35. The method of claim 28, wherein the tissue measurement site is located on a finger of the patient.

36. The method of claim 35, wherein at least one of the first optical sensor and the second optical sensor comprise an adhesive butterfly wrap configured to secure to the finger of the patient when in use.

37. The method of claim 28, wherein measuring the first total hemoglobin estimate comprises sequentially transmitting 660 nm, 905 nm, 1170 nm, and 1300 nm wavelengths from the first optical sensor into a fingernail portion of the tissue measurement site.