Respiratory profile parameter determination method and apparatus

• US 6,471,658 B1
• Filed: 12/08/2000
• Issued: 10/29/2002
• Est. Priority Date: 11/03/1997
• Status: Expired due to Fees

• Current Assignee: RIC INVESTMENTS LLC (Respironics Incorporated)
• Original Assignee: NTC Technology, Inc. (Dixtal Medical, Inc.)
• Inventors: Gunneson, Paul B., Feldman, Barry J., Daniels, Rich H, DelFavero, John R., Jaffe, Michael B., Wigforss, Eric P.
• Primary Examiner(s): Shaver, Kevin
• Assistant Examiner(s): Natnithithadha, Navin
• Application Number:
  US09/733,776
• Time in Patent Office: 690 Days
• Field of Search: 600/529, 600/531, 600/532, 600/533, 600/538
• 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. A method for displaying data of a plurality of respiratory profile parameters and at least one respiratory-based estimate of a blood gas parameter, comprising:

in response to a signal generated while monitoring at least respiration of an individual, displaying

a numeric value of a partial pressure of arterial carbon dioxide, an indicator of arterial

blood oxygen saturation, a pulse rate, a respiratory rate, a partial pressure of end tidal

carbon dioxide, and data of at least one other selected one of the plurality of respiratory

profile parameters and at least one respiratory-based estimate of a blood gas parameter.

2. The method of claim 1, further comprising displaying a graphical representation of a selected one of the plurality of respiratory profile parameters and at least one respiratory-based estimate of a blood gas parameter in response to said signal.

3. The method of claim 2, wherein said displaying said graphical representation comprises displaying a multi-component bar graph including a plurality of bars, selected ones of said plurality of bars each including a first component and a discrete second component adjacent said first component.

4. The method of claim 3, wherein said first component represents a portion of a breath effected by a mechanical ventilator.

5. The method of claim 3, wherein said discrete second component represents a portion of a breath effected spontaneously by a patient.

6. A method of displaying a plurality of respiratory profile data and at least one respiratory-based estimate of at least one blood gas parameter in response to a signal generated as respiration of an individual is monitored, comprising:

displaying a numeric value representative of at least one of the plurality of respiratory profile data and of the at least one respiratory-based estimate of the at least one blood gas parameter; and

displaying a graphical representation of at least one of the plurality of respiratory profile data.

7. The method of claim 6, wherein said displaying said graphical representation comprises displaying a multi-component bar graph including a plurality of bars, selected ones of said plurality of bars each including a first component and a discrete second component adjacent said first component.

8. The method of claim 7, wherein said first component represents a portion of a breath effected by a mechanical ventilator.

9. The method of claim 8, wherein said discrete second component represents a portion of a breath effected spontaneously by a patient.

10. A method of displaying a plurality of respiratory profile data in response to a signal, comprising:

in response to a signal, displaying a multi-component bar graph including a plurality of bars, selected ones of said plurality of bars each including a first component and a discrete second component adjacent said first component.

11. The method of claim 10, wherein said first component represents a first respiratory profile parameter.

12. The method of claim 11, wherein said first component represents a portion of a breath effected by mechanical ventilator.

13. The method of claim 11, wherein said discrete second component represent a second respiratory profile parameter that corresponds to said first respiratory profile parameter.

14. The method of claim 12, wherein said discrete second component represents a portion of a breath effected spontaneously by a patient.