System and method for monitoring respiratory rate measurements

• US 10,813,598 B2
• Filed: 12/21/2017
• Issued: 10/27/2020
• Est. Priority Date: 10/15/2009
• Status: Active Grant

• Current Assignee: Masimo Corporation
• Original Assignee: Masimo Corporation
• Inventors: Al-Ali, Ammar, Muhsin, Bilal, O'Reilly, Michael
• Primary Examiner(s): Natnithithadha, Navin
• Application Number:
  US15/851,176
• Publication Number:
  US 20180214090A1
• Time in Patent Office: 1,041 Days
• Field of Search: 600323, 600324, 600325, 600326, 600327, 600328, 600481, 600483, 600484, 600500-503, 600529, 600538
• 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 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/0803 Recording apparatus specially adapted therefor
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61B 5/14542 for measuring blood gases A61B5/14551 takes precedence
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/318 Heart-related electrical modalities, e.g. electrocardiography [ECG]
• CPC Class Codes: A61B 5/339 Displays specially adapted therefor
• CPC Class Codes: A61B 5/7221 Determining signal validity, reliability or quality A61B5/7207 and A61B5/7217 take precedence
• CPC Class Codes: A61B 5/7278 Artificial waveform generation or derivation, e.g. synthesising signals from measured signals A61B5/327 takes precedence
• 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: A61B 7/003 Detecting lung or respiration noise
• CPC Class Codes: G16H 40/60 for the operation of medical equipment or devices
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16H 40/67 for remote operation

Abstract

This disclosure describes, among other features, systems and methods for using multiple physiological parameter inputs to determine multiparameter confidence in respiratory rate measurements. For example, a patient monitoring system can programmatically determine multiparameter confidence in respiratory rate measurements obtained from an acoustic sensor based at least partly on inputs obtained from other non-acoustic sensors or monitors. The patient monitoring system can output a multiparameter confidence indication reflective of the programmatically-determined multiparameter confidence. The multiparameter confidence indication can assist a clinician in determining whether or how to treat a patient based on the patient'"'"'s respiratory rate.

Claims

1. A system for monitoring a respiratory rate measurement from a patient, the system comprising:

one or more hardware processors configured to;

receive an acoustic signal generated by an acoustic sensor responsive to vibrations of a patient,

determine, from the acoustic signal, a first measurement of a respiratory rate,

determine a first range of measurements of the respiratory rate from one or more characteristics of the patient, the first range of measurements forming a first safety zone, and

determine a second range of measurements of the respiratory rate from the one or more characteristics, the second range of measurements forming a second safety zone, the second range of measurements being different from the first range of measurements and representing a greater safety risk to the patient than the first range of measurements; and

a display configured to present the first safety zone and the second safety zone together with an indicator, the indicator being positioned according to the first measurement, a position of the indictor relative to the first safety zone and the second safety zone denoting whether the first measurement is within the first range of measurements or the second range of measurements and denoting a degree of safety concern for the patient estimated from the first measurement.

2. The system of claim 1, wherein

when at least one of the one or more characteristics has a first magnitude, the display is configured to present the indicator so that the position of the indicator denotes that the first measurement is within the first range of measurements and denotes that the degree of safety concern is less than if the first measurement were within the second range of measurements, and

when at least one of the one or more characteristics has a second magnitude different from the first magnitude, the display is configured to present the indicator so that the position of the indicator denotes that the first measurement is within the second range of measurements and denotes that the degree of safety concern is greater than if the first measurement were within the first range of measurements.

3. The system of claim 1, wherein

when at least one of the one or more characteristics is within a first category, the display is configured to present the indicator so that the position of the indicator denotes that the first measurement is within the first range of measurements and denotes that the degree of safety concern is less than if the first measurement were within the second range of measurements, and

when at least one of the one or more characteristics is within a second category different from the first category, the display is configured to present the indicator so that the position of the indicator denotes that the first measurement is within the second range of measurements and denotes that the degree of safety concern is greater than if the first measurement were within the first range of measurements.

4. The system of claim 1, wherein the one or more characteristics comprises a comorbidity for the patient.

5. The system of claim 1, wherein the one or more characteristics comprises a medication being used by the patient.

6. The system of claim 1, wherein the one or more characteristics comprises an age of the patient.

7. The system of claim 1, wherein the one or more characteristics comprises a gender of the patient.

8. The system of claim 1, wherein the one or more characteristics comprises an activity engaged in by the patient.

9. The system of claim 1, wherein

the one or more hardware processors is configured to determine a third range of measurements of the respiratory rate from the one or more characteristics, the third range of measurements forming a third safety zone, the third range of measurements being different from the first range of measurements and the second range of measurements, the third range of measurements representing a greater safety risk to the patient than the second range of measurements;

and

the display is configured to present the first safety zone, the second safety zone, and the third safety zone together with the indicator, the position of the indictor relative to the first safety zone, the second safety zone, and the third safety zone denoting whether the first measurement is within the first range of measurements, the second range of measurements, or the third range of measurements and denoting the degree of safety concern for the patient estimated from the first measurement.

10. The system of claim 1, wherein

the one or more hardware processors is configured to determine, from the acoustic signal, a second measurement of the respiratory rate, the second measurement being different from the first measurement;

and

the display is configured to reposition the indicator according to the second measurement so that the position of the indicator relative to the first safety zone and the second safety zone denotes whether the second measurement is within the first range of measurements or the second range of measurements and denotes the degree of safety concern for the patient estimated from the second measurement.

11. The system of claim 1, wherein the one or more hardware processors is configured to activate an alarm responsive to the first measurement being within the first range of measurements.

12. The system of claim 1, wherein the one or more hardware processors is configured to change the one or more characteristics responsive to a user input.

13. The system of claim 1, wherein the display is configured to present the first safety zone in a first color and the second safety zone in a second color different from the first color.

14. The system of claim 1, wherein the display is configured to present a numerical value of the first measurement together with the first safety zone, the second safety zone, and the indicator.

15. A method for monitoring a respiratory rate measurement from a patient, the method comprising:

receiving, by one or more hardware processors, an acoustic signal generated by an acoustic sensor responsive to vibrations of a patient;

determining, by the one or more hardware processors from the acoustic signal, a first measurement of a respiratory rate;

determining, by the one or more hardware processors, a first range of measurements of the respiratory rate from one or more characteristics of the patient, the first range of measurements forming a first safety zone;

determining, by the one or more hardware processors, a second range of measurements of the respiratory rate from the one or more characteristics, the second range of measurements forming a second safety zone, the second range of measurements being different from the first range of measurements and representing a greater safety risk to the patient than the first range of measurements; and

presenting, by a display, the first safety zone and the second safety zone together with an indicator, the indicator being positioned according to the first measurement, a position of the indictor relative to the first safety zone and the second safety zone denoting whether the first measurement is within the first range of measurements or the second range of measurements and denoting a degree of safety concern for the patient estimated from the first measurement.

16. The method of claim 15, wherein said presenting comprises presenting the indicator so that the position of the indicator denotes that the first measurement is within the first range of measurements and denotes that the degree of safety concern is less than if the first measurement were within the second range of measurements, and further comprising:

changing the one or more characteristics to obtain a changed one or more characteristics;

determining, by the one or more hardware processors from the acoustic signal, a second measurement of the respiratory rate, the second measurement being the same as the first measurement;

adjusting, by the one or more hardware processors, the first range of measurements according to the changed one or more characteristics to obtain an adjusted first range of measurements that forms an adjusted first safety zone;

adjusting, by the one or more hardware processors, the second range of measurements according to the changed one or more characteristics to obtain an adjusted second range of measurements that forms an adjusted second safety zone; and

presenting, by the display, the adjusted first safety zone and the adjusted second safety zone together with the indicator positioned according to the second measurement so that the position of the indictor relative to the adjusted first safety zone and the adjusted second safety zone denotes that the second measurement is within the adjusted second range of measurements and denotes that the degree of safety concern is greater than if the second measurement were within the adjusted first range of measurements.

17. The method of claim 15, wherein the one or more characteristics comprises two or more of:

a comorbidity for the patient, a medication being used by the patient, an age of the patient, a gender of the patient, or an activity engaged in by the patient.

18. The method of claim 15, further comprising determining, by the one or more hardware processors, a third range of measurements of the respiratory rate from the one or more characteristics, the third range of measurements forming a third safety zone, the third range of measurements being different from the first range of measurements and the second range of measurements, the third range of measurements representing a greater safety risk to the patient than the second range of measurements,

wherein said presenting comprises presenting, by the display, the first safety zone, the second safety zone, and the third safety zone together with the indicator, the position of the indictor relative to the first safety zone, the second safety zone, and the third safety zone denoting whether the first measurement is within the first range of measurements, the second range of measurements, or the third range of measurements and denoting the degree of safety concern for the patient estimated from the first measurement.

19. The method of claim 15, further comprising activating, by the one or more hardware processors, an alarm in response to the first measurement being within the first range of measurements.

20. The method of claim 15, further comprising changing, by the one or more hardware processors, the one or more characteristics in response to a user input.