Respiratory profile parameter determination method and apparatus

• US 20030045807A1
• Filed: 10/15/2002
• Published: 03/06/2003
• Est. Priority Date: 11/03/1997
• Status: Active Grant

• Current Assignee: RIC INVESTMENTS LLC (Koninklijke Philips N.V.)
• Original Assignee: RIC INVESTMENTS LLC (Koninklijke Philips N.V.)
• Inventors: Daniels, Rich II, DelFavero, John R., Jaffe, Michael B., Gunneson, Paul B., Feldman, Barry J., Wigforss, Eric P.
• Granted Patent: US 7,662,106 B2
• Time in Patent Office: Days
• US Class Current: 600/538
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/083 Measuring rate of metabolism by using breath test, e.g. measuring rate of oxygen consumption
• CPC Class Codes: A61B 5/087 Measuring breath flow
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/021 operated by electrical means A61M16/202 – A61M16/205 take precedence
• CPC Class Codes: A61M 2016/0036 in the breathing tube and used in both inspiratory and expiratory phase
• CPC Class Codes: A61M 2230/202 partial carbon oxide pressure, e.g. partial dioxide pressure (P-CO2)

Abstract

A method of sampling one or more respiratory profile characteristics and monitoring a variety of respiratory profile parameters. The sampled respiratory characteristics include respiratory flow rate, respiratory pressure, and partial pressure of at least one constituent of a patient'"'"'s respiration. The method detects patient breaths, determines whether each breath is a spontaneous breath or a ventilator-induced breath and calculates various respiratory profile parameters based on the sampled measurements. The method displays the respiratory profile parameters in graphic and numeric forms. Preferably, the method allows a user to select the displayed respiratory profile parameters.

Claims

1. Apparatus for monitoring and displaying data obtained from respiration of an individual, comprising:

at least one respiratory monitor;

at least one processing element in communication with said at least one respiratory monitor and configured to;

evaluate a signal generated by said at least one respiratory monitor while monitoring at least respiration of the individual;

calculate at least one respiratory parameter based on said signal; and

estimate at least one blood gas parameter based on at least one of said signal and said at least one respiratory parameter.

2. The apparatus of claim 1, further comprising:

at least one display element in communication with at least one of said at least one processing element and said at least one respiratory monitor.

3. The apparatus of claim 2, wherein said at least one display element comprises an indicator configured to display at least one respiratory parameter and said at least one blood gas parameter.

4. The apparatus of claim 3, wherein said indicator comprises a numeric component.

5. The apparatus of claim 3, wherein said indicator comprises a graphic component.

6. The apparatus of claim 5, wherein said graphic component is configured to display a bar graph.

7. The apparatus of claim 6, wherein at least one bar of said bar graph includes a first component and an adjacent, discrete second component.

8. The apparatus of claim 7, wherein said first component represents a first respiratory parameter and said second component represents a second respiratory parameter.

9. The apparatus of claim 8, wherein said first respiratory parameter comprises a portion of a breath by the individual that was effected by a mechanical ventilator and said second respiratory parameter comprises a portion of a breath effected by the individual.

10. The apparatus of claim 1, wherein said at least one respiratory monitor comprises a respiratory flow monitor.

11. The apparatus of claim 1, wherein said at least one respiratory monitor comprises a respiratory gas monitor.

12. The apparatus of claim 11, wherein said respiratory gas monitor comprises a respiratory carbon dioxide monitor.

13. The apparatus of claim 1, wherein said at least one respiratory monitor comprises a respiratory flow monitor and a respiratory gas monitor.

14. The apparatus of claim 13, wherein said respiratory gas monitor comprises a respiratory carbon dioxide monitor.

15. A display element of apparatus for monitoring and displaying data obtained from respiration of an individual, comprising an indicator configured to, in response to a signal from at least one of a respiratory monitor and a processing element of the apparatus, display a bar graph, at least one bar of which includes a first component and a second component discrete from and adjacent to said first component.

16. The display element of claim 15, wherein said first component represents a first respiratory parameter.

17. The display element of claim 16, wherein said first component represents a portion of a breath by the individual which was effected by a mechanical ventilator.

18. The display element of claim 16, wherein said second component represents a second respiratory parameter.

19. The display element of claim 18, wherein said second respiratory parameter comprises a portion of a breath effected by the individual.

20. Apparatus for monitoring and displaying data obtained from respiration of an individual, comprising:

a respiratory flow monitor;

a respiratory gas monitor;

at least one processing element in communication with said at least one respiratory flow monitor and said at least one respiratory gas monitor and configured to;

evaluate signals generated by each of said at least one respiratory flow monitor and said at least one respiratory gas monitor while monitoring at least respiration of the individual;

calculate at least one respiratory parameter based on said signals; and

estimate at least one blood gas parameter based on at least one of said signals and said at least one respiratory parameter; and

at least one display element in communication with at least one of said at least one processing element, said at least one respiratory flow monitor, and said at least one respiratory gas monitor, said at least one display element being configured to show at least one displayed respiratory parameter and said at least one blood gas parameter.

21. The apparatus of claim 20, wherein said at least one display element is configured to show a number representative of at least one of said at least one displayed respiratory parameter and said at least one blood gas parameter.

22. The apparatus of claim 20, wherein said at least one display element is configured to show a graphic representation of at least one of said at least one displayed respiratory parameter and said at least one blood gas parameter.

23. The apparatus of claim 22, wherein said graphic representation comprises a bar graph.

24. The apparatus of claim 22, wherein at least one bar of said bar graph includes a first component and an adjacent, discrete second component.

25. The apparatus of claim 24, wherein said first component represents a first respiratory parameter and said second component represents a second respiratory parameter.

26. The apparatus of claim 25, wherein said first respiratory parameter comprises a portion of a breath by the individual that was effected by a mechanical ventilator and said second respiratory parameter comprises a portion of a breath effected by the individual.

27. The apparatus of claim 20, wherein said at least one respiratory gas monitor comprises a respiratory carbon dioxide monitor.