Method for compensating for non-metabolic changes in respiratory or blood gas profile parameters
First Claim
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1. A method of compensating for non-metabolic changes in a respiratory profile parameter of a patient, comprising:
- detecting an onset of a non-metabolic change;
generating a compensatory signal in response to the non-metabolic change; and
employing said compensatory signal in calculating the respiratory profile parameter.
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Abstract
A method of compensating for non-metabolic changes in respiratory or blood gas parameters including generating a compensatory signal based on the magnitude of the non-metabolic change and the amount of time elapsed since the onset of the non-metabolic change. The method of the present invention is useful for compensating for non-metabolic changes in non-invasive carbon dioxide elimination measurements and, particularly, when carbon dioxide elimination is employed to determine cardiac output on a non-invasive, continuous basis.
79 Citations
26 Claims
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1. A method of compensating for non-metabolic changes in a respiratory profile parameter of a patient, comprising:
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detecting an onset of a non-metabolic change;
generating a compensatory signal in response to the non-metabolic change; and
employing said compensatory signal in calculating the respiratory profile parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of compensating for non-metabolic changes in carbon dioxide elimination of a patient, comprising:
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detecting a change in ventilation of the patient;
non-invasively determining the carbon dioxide elimination of the patient;
estimating an arterial-venous gradient of the patient;
generating a compensatory signal in response to said change in ventilation and a magnitude of a non-metabolic change in carbon dioxide elimination; and
calculating a cardiac output of the patient by modifying at least one of the carbon dioxide elimination and said arterial-venous gradient and dividing the carbon dioxide elimination by said arterial-venous gradient. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification