Method for controlling a spiroergometric system and spiroergometric system

• US 9,486,147 B2
• Filed: 08/05/2010
• Issued: 11/08/2016
• Est. Priority Date: 08/13/2009
• Status: Active Grant

• Current Assignee: Caardio GmbH
• Original Assignee: Aceos GmbH
• Inventors: Jung, Gunnar, Tuchtenhagen, Dirk, Schotters, Markus, Kusch, Martin
• Primary Examiner(s): Kahelin, Michael
• Assistant Examiner(s): Alter, Mitchell E
• Application Number:
  US13/390,257
• Publication Number:
  US 20120209128A1
• Time in Patent Office: 2,287 Days
• US Class Current: 1/1
• 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 5/024 Detecting, measuring or recording pulse rate or heart rate A61B5/0205, A61B5/021 take 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 5/0833 Measuring rate of oxygen consumption
• CPC Class Codes: A61B 5/0836 Measuring rate of CO2 production
• CPC Class Codes: A61B 5/091 Measuring volume of inspired or expired gases, e.g. to determine lung capacity
• CPC Class Codes: A61B 5/222 combined with detection or measurement of physiological parameters, e.g. heart rate
• CPC Class Codes: A61B 5/4884 inducing physiological or psychological stress, e.g. applications for stress testing
• CPC Class Codes: A63B 2230/433 partial CO2 value
• CPC Class Codes: A63B 2230/436 partial O2 value
• CPC Class Codes: A63B 23/18 for improving respiratory function
• CPC Class Codes: A63B 24/0087 Electric or electronic controls for exercising apparatus of groups A63B21/00 - A63B23/00, e.g. controlling load

Abstract

Shown and described is a method for controlling and/or regulating a spiroergometry system (1) for determining energy metabolism during physical exertion, wherein the spiroergometry system (1) has a user unit (2) arranged in the flow of the inhaled and exhaled air of a test subject (4) for removing a respiratory gas sample of the test subject (4), at least one analysis unit (5) for measuring the respiratory gas composition and/or the respiratory flow volume and for determining physiological parameters relating to the ventilation and/or gas exchange of the test subject (4), particularly for determining the oxygen volume taken in during at least one inhalation of the test subject (4) and the carbon dioxide volume exhaled after the breath and, preferably, the respiratory quotient, at least one measuring device (6) for measuring the heart rate of the test subject (4), at least one control device (7) for controlling the spiroergometry system (1) and a cardio equipment unit (8) for the physical exertion of the test subject (4), wherein as the exertion of the test subject increases incrementally during use of the cardio equipment unit (8), a measurement of the respiratory gas composition and/or respiratory flow volume is performed automatically only toward the end of an exertion stage or of a performance stage prior to an increase in exertion, and a determination is made of the physiological parameters, particularly a determination of the inhaled oxygen volume and of the exhaled carbon dioxide volume with respect to at least one breath toward the end of the exertion stage.

Claims

1. A method of using a spiroergometry system, comprising:

removing, using a user unit arranged in a flow of inhaled and exhaled air of a test subject a respiratory gas sample of the test subject;

measuring, with at least one analysis unit, one or more of;

a respiratory gas composition and a respiratory flow volume;

determining an oxygen volume taken in during at least one inhalation of the test subject and a carbon dioxide volume exhaled after the at least one inhalation and a respiratory quotient;

measuring a heart rate of the test subject;

and

monitoring, by a cardio equipment unit, a physical exertion of the test subject;

wherein as the exertion of the test subject increases incrementally during the use of the cardio equipment unit, measuring of the one or more of the respiratory gas composition and respiratory flow volume only toward the end of an exertion stage of the test subject prior to an increase in exertion, and a determination is made of the inhaled oxygen volume and of the exhaled carbon dioxide volume with respect to at least one breath toward the end of the exertion stage; and

an incremental increase in exertion is provided until a respiratory- quotient of less than 1.09 is reached,

an incremental increase in exertion is provided and physiological parameters are determined discontinuously toward an end of the respective exertion stage,

measuring discontinuously an oxygen composition and oxygen flow volume from at least one inhalation of the test subject and a carbon dioxide composition and carbon dioxide flow volume from at least one exhalation of the test subject only toward the end of an exertions stage prior to an increase in exertion and prior to the respiratory quotient being 1.09; and

when a respiratory quotient greater than 1.09 is reached, the exertion level is subsequently increased in a continuous manner and the physiological parameters are determined continuously and oxygen composition and oxygen flow volume from at least one inhalation of the test subject and a carbon dioxide composition and carbon dioxide flow volume from at least one exhalation of the test subject are continuously measured.

2. The method as set forth in claim 1, wherein the measurement of one or more of the respiratory gas composition and the respiratory flow volume, and the determination of the physiological parameters, occurs automatically and discontinuously over a time period of less than 40 seconds prior to an end of the exertion stage.

3. The method as set forth in claim 1, wherein the physiological parameters are determined automatically for less than 8 breaths prior to an end of the exertion stage.

4. The as set forth in claim 1, wherein a duration of an exertion stage is less than 3 minutes.

5. The method as set forth in claim 1, wherein the increase in exertion between two adjacent exertion stages is between 10 watts and 100 watts.

6. The method as set forth in claim 1, wherein the physiological parameters are determined for each breath prior to the end of the exertion stage and the values of the physiological parameters for the entire number of breaths taken in a period of time prior to the end of the exertion stage are averaged automatically.

7. The method as set forth in claim 1, wherein faulty breaths are recognized automatically and excluded from averaging.

8. The method as set forth in claim 1, wherein a performance unit of the cardio equipment unit determining the exertion of the test subject is controlled automatically.

9. The method as set forth in claim 1, wherein until a respiratory quotient of less than or equal to 1.03 is reached, an incremental increase in exertion is provided and the physiological parameters are determined discontinuously toward the end of the respective exertion stage, and that when a greater respiratory quotient than 1.03 is reached, the exertion is subsequently increased in a continuous manner and the physiological parameters are determined continuously.