Cardiopulmonary exercise testing apparatus and method
First Claim
1. A method for displaying data gathered from a subject during a cardiopulmonary exercise test and computed relationships based on that data, comprising the steps ofplotting, on a first graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}O2 on the x-axis, heart rate on the first y-axis, and calculated stroke volume on the second y-axis using a computer;
- displaying the first graph on a display;
plotting, on a second graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}CO2 on the x-axis, {dot over (V)}E on the first y-axis, and SaO2 on the second y-axis using a computer;
displaying the second graph on a display;
plotting, on a third graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}O2 on the x-axis, {dot over (V)}CO2 on the first y-axis, and ratios {dot over (V)}/{dot over (V)}CO2 {dot over (V)}E/{dot over (V)}CO2 and {dot over (V)}E/{dot over (V)}O2 on the second y-axis using a computer;
displaying the third graph on a display;
plotting, on a fourth graph having an x-axis, a first y-axis and a second y-axis, time on the x-axis, heart rate on the first y-axis and {dot over (V)}O2 on the second y-axis by using a computer; and
displaying the fourth graph on a display.
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Abstract
A gas analysis apparatus, and a method for calibrating it and for compensating measurement errors, are disclosed. This method and apparatus are particularly suited for use during a cardiopulmonary exercise test by a test subject. The oxygen and carbon dioxide concentrations of the subject'"'"'s breath are measured, and errors are compensated based on the results of previous calibration. These compensated measurements, as well as other physiological data monitored during the cardiopulmonary exercise test quantities calculated from these measurements, are presented as a series of graphs in a logical order to enhance their diagnostic and prognostic value. A facemask and headstraps are adapted for use with the gas analysis apparatus. The facemask possesses a plurality of pins fitting into corresponding holes in the headstraps, and the headstraps possess quick-release attachment means to provide for quickly securing the face mask to or removing it from a subject.
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Citations
22 Claims
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1. A method for displaying data gathered from a subject during a cardiopulmonary exercise test and computed relationships based on that data, comprising the steps of
plotting, on a first graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}O2 on the x-axis, heart rate on the first y-axis, and calculated stroke volume on the second y-axis using a computer; -
displaying the first graph on a display;
plotting, on a second graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}CO2 on the x-axis, {dot over (V)}E on the first y-axis, and SaO2 on the second y-axis using a computer;
displaying the second graph on a display;
plotting, on a third graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}O2 on the x-axis, {dot over (V)}CO2 on the first y-axis, and ratios {dot over (V)}/{dot over (V)}CO2 {dot over (V)}E/{dot over (V)}CO2 and {dot over (V)}E/{dot over (V)}O2 on the second y-axis using a computer;
displaying the third graph on a display;
plotting, on a fourth graph having an x-axis, a first y-axis and a second y-axis, time on the x-axis, heart rate on the first y-axis and {dot over (V)}O2 on the second y-axis by using a computer; and
displaying the fourth graph on a display. - View Dependent Claims (2, 3, 4)
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5. A method for displaying data gathered from a subject during a cardiopulmonary exercise test and computed relationships based on that data, comprising the steps of:
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plotting, on a first graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}O2 on the x-axis, heart rate on the first y-axis, and calculated stroke volume on the second y-axis by using a computer means ;
displaying the first graph;
plotting, on a second graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}CO2 on the x-axis, {dot over (V)}E on the first y-axis, and SaO2 on the second y-axis using a computer;
displaying the second graph;
plotting, on a third graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}O2 on the x-axis, {dot over (V)}CO2 on the first y-axis, and ratios {dot over (V)}E/{dot over (V)}CO2 and {dot over (V)}E/{dot over (V)}O2 on the second y-axis using a computer;
displaying the third graph;
plotting, on a fourth graph having an x-axis, a first y-axis and a second y-axis, time on the x-axis, heart rate on the first y-axis and {dot over (V)}O2 on the second y-axis using a computer; and
displaying the fourth graph. - View Dependent Claims (6, 7, 8, 9, 10, 13)
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11. A method for displaying data gathered from a subject during a cardiopulmonary exercise test and computed relationships based on that data, comprising the steps of:
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plotting, on a first graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}O2 on the x-axis, heart rate on the first y-axis, and calculated stroke volume on the second y-axis using a computer;
printing the first graph;
plotting, on a second graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}CO2 on the x-axis, {dot over (V)}E on the first y-axis, and SaO2 on the second y-axis using a computer;
printing the second graph;
plotting, on a third graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}O2 on the x-axis, {dot over (V)}CO2 on the first y-axis, and ratios {dot over (V)}E/{dot over (V)}CO2 and {dot over (V)}E/{dot over (V)}O2 on the second y-axis using a computer;
printing the third graph;
plotting, on a fourth graph having an x-axis, a first y-axis and a second y-axis, time on the x-axis, heart rate on the first y-axis and {dot over (V)}O2 on the second y-axis using a computer; and
printing the fourth graph. - View Dependent Claims (12)
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14. A method for displaying data gathered from a subject during a cardiopulmonary exercise test comprising:
plotting, on a graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}O2 on the x-axis, heart rate on the first y-axis, and calculated stroke volume on the second y-axis. - View Dependent Claims (15, 16)
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17. A method for displaying data gathered from a subject during a cardiopulmonary exercise test, comprising:
a graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}CO2 on the x-axis, {dot over (V)}E on the first y-axis, and plotting a reference line representing a {dot over (V)}E/{dot over (V)}CO2 ratio substantially equal to 34. - View Dependent Claims (18, 19, 20)
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21. A method for displaying data comprising:
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gathering data from a subject wearing a face mask during a cardiopulmonary exercise test;
plotting, on a graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}O2 on the x-axis, heart rate on the first y-axis, and calculated stroke volume on the second y-axis using the data gathered.
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22. A method for displaying data gathered from a subject during a cardiopulmonary exercise test, comprising:
a graph having an x-axis, a first y-axis and a second y-axis, {dot over (V)}O2 on the x-axis, {dot over (V)}CO2 on the first y-axis, and ratios {dot over (V)}E/{dot over (V)}CO2 and {dot over (V)}E/{dot over (V)}O2 on the second y-axis using a computer.
Specification