SYSTEMS AND METHODS FOR PATIENT MONITORING

• US 20140135603A1
• Filed: 11/12/2012
• Published: 05/15/2014
• Est. Priority Date: 11/12/2012
• Status: Abandoned Application

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Boyer, Robert T., Jordan, William A.
• Application Number:
  US13/674,701
• Publication Number:
  US 20140135603A1
• Time in Patent Office: Days
• US Class Current: 600/324
• CPC Class Codes: A61B 2503/04 Babies, e.g. for SIDS detection
• CPC Class Codes: A61B 5/0004 characterised by the type of physiological signal transmitted
• CPC Class Codes: A61B 5/002 Monitoring the patient using a local or closed circuit, e.g. in a room or building A61B5/0017 takes precedence
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• 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: G16H 10/60 for patient-specific data, e.g. for electronic patient records
• CPC Class Codes: G16H 40/67 for remote operation

Abstract

Systems and methods for patient monitoring that include receiving a set first of SpO₂ readings from a first sensor over a time period, receiving a set of second SpO₂ readings from a second sensor over the time period, calculating an average first SpO₂ value based on some or all of the first SpO₂ readings, calculating an average second SpO₂ value based on some or all of the second SpO₂ readings, calculating a differential value based some or all of the first SpO₂ readings and some or all of the second SpO₂ readings, and determining a screen result based upon the average first SpO₂ value, the average second SpO₂ value, and the differential value. The differential value may be, for example, an average differential value or an accumulation differential value.

Claims

1. A method of screening a patient, comprising the steps of:

receiving a plurality of first SpO₂ readings from a first sensor over a time period;

receiving a plurality of second SpO₂ readings from a second sensor over the time period;

calculating an average first SpO₂ value based on at least some of the plurality of first SpO₂ readings;

calculating an average second SpO₂ value based on at least some of the plurality of second SpO₂ readings;

calculating a differential value based on at least some of the plurality of first SpO₂ readings and at least some of the plurality of second SpO₂ readings; and

determining a screen result based upon the average first SpO₂ value, the average second SpO₂ value, and the differential value.

2. The method according to claim 1, wherein the differential value is an average differential value, and wherein the method further includes the step of calculating a plurality of differential values, each differential value calculated as an absolute value difference between one of the plurality of first SpO₂ readings and a corresponding one of the plurality of second SpO₂ readings, wherein the average differential value is calculated as an average of at least some of the plurality of differential values.

3. The method according to claim 1, wherein the differential value is an accumulation differential value, and wherein the method further includes the step of calculating a plurality of differential values, each differential value calculated as an absolute value difference between one of the plurality of first SpO₂ readings and a corresponding one of the plurality of second SpO₂ readings, wherein the accumulation differential value is calculated as a sum of at least some of the plurality of differential values.

4. The method according to claim 1, wherein the screen result is determined to be negative if the differential value is less than a third threshold and either the average first SpO₂ value is greater than a first threshold or the average second SpO₂ value is greater than a second threshold.

5. The method according to claim 1, wherein the screen result is determined to be unknown if the time period is less than a minimum time threshold.

6. The method according to claim 1, wherein all of the first SpO₂ readings within a selected portion of the time period and all of the second SpO₂ reading within the selected portion of the time period are excluded from use in calculating the average first SpO₂ value, the average second SpO₂ value, and the differential value.

7. The method according to claim 1, further comprising the step of determining a percentage of the time period when at least one of the first SpO₂ values are greater than a first threshold, the second SpO₂ values are greater than a second threshold, and the differential values between the first SpO₂ readings and the second SpO₂ readings are less than a third threshold.

8. A system for screening a patient, comprising:

a first sensor disposed at a first location, the first sensor configured to obtain a plurality of first SpO₂ readings over a time period;

a second sensor disposed at a second location, the second sensor configured to obtain a plurality of second SpO₂ readings over the time period;

a processor in operable communication with the first and second sensors, the processor configured to;

receive the plurality of first SpO₂ readings from the first sensor;

receive the plurality of second SpO₂ readings from the second sensor;

calculate an average first SpO₂ value based on at least some of the plurality of first SpO₂ readings;

calculate an average second SpO₂ value based on at least some of the plurality of second SpO₂ readings;

calculate a plurality of differential values, each differential value calculated as a difference between one of the plurality of first SpO₂ readings and a corresponding one of the plurality of second SpO₂ readings; and

calculate at least one of an average differential value and an accumulation differential value based on at least some of the plurality of differential values; and

a display in operable communication with the processor, the display configured to;

display a current first SpO₂ reading;

display the average first SpO₂ value;

display a current second SpO₂ reading;

display the average second SpO₂ value;

display a current differential value; and

display the at least one of the average differential value and the accumulation differential value.

9. The system according to claim 8, wherein the processor is further configured to determine a screen result based upon the average first SpO₂ value, the average second SpO₂ value, and the at least one of the average differential value and the accumulation differential value, and wherein the display is further configured to display the screen result.

10. The system according to claim 9, wherein the processor determines the screen result to be negative if the at least one of the average differential value and the accumulation differential value is less than or equal to a respective threshold and either the average first SpO₂ value is greater than a first threshold or the average second SpO₂ value is greater than a second threshold.

11. The system according to claim 8, wherein the average differential value is calculated as an average of at least some of the plurality of differential values.

12. The system according to claim 8, wherein the accumulation differential value is calculated as a sum of at least some of the plurality of differential values.

13. The system according to claim 8, wherein the processor is further configured to exclude all of the first SpO₂ readings within a selected portion of the time period and all of the second SpO₂ reading within the selected portion of the time period from use in calculating the average first SpO₂ value, the average second SpO₂ value, and the at least one of the average differential value and the accumulation differential value.

14. The system according to claim 8, wherein the processor is further configured to determine a percentage of the time period when at least one of the first SpO₂ values are greater than or equal to a first threshold, the second SpO₂ values are greater than or equal to a second threshold, and the differential values between the first SpO₂ readings and the second SpO₂ readings are less than or equal to a third threshold, and wherein the display is further configured to display the percentage of the time period.

15. A non-transitory computer-readable storage medium encoded with a program that, when executed by a processor, causes the processor to:

receive a plurality of first SpO₂ readings from a first sensor over a time period;

receive a plurality of second SpO₂ readings from a second sensor over the time period;

calculate an average first SpO₂ value based on at least some of the plurality of first SpO₂ readings;

calculate an average second SpO₂ value based on at least some of the plurality of second SpO₂ readings;

calculate a plurality of differential values, each differential value calculated as a difference between one of the plurality of first SpO₂ readings and a corresponding one of the plurality of second SpO₂ readings;

calculate at least one of an average differential value and an accumulation differential value based on at least some of the plurality of differential values; and

determine a screen result based upon the average first SpO₂ value, the average second SpO₂ value, and the at least one of the average differential value and the accumulation differential value.

16. The non-transitory computer-readable storage medium according to claim 15, wherein the processor is further caused to exclude all of the first SpO₂ readings within a selected portion of the time period and all of the second SpO₂ reading within the selected portion of the time period time from use in calculating the average first SpO₂ value, the average second SpO₂ value, and the at least one of the average differential value and the accumulation differential value.

17. The non-transitory computer-readable storage medium according to claim 15, wherein the processor is further caused to determine a percentage of the time period when at least one of the first SpO₂ values are greater than or equal to a first threshold, the second SpO₂ values are greater than or equal to a second threshold, and the differential values between the first SpO₂ readings and the second SpO₂ readings are less than or equal to a third threshold.

18. The non-transitory computer-readable storage medium according to claim 15, wherein the screen result is determined to be negative if the at least one of the average differential value and the accumulation differential value is less than a respective threshold and either the average first SpO₂ value is greater than a first threshold or the average second SpO₂ value is greater than a second threshold.

19. The non-transitory computer-readable storage medium according to claim 15, wherein the average differential value is calculated as an average of at least some of the plurality of differential values.

20. The non-transitory computer-readable storage medium according to claim 15, wherein the accumulation differential value is calculated as a sum of at least some of the plurality of differential values.