Method and apparatus for anatomical deadspace measurement
First Claim
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1. An apparatus for determining an anatomical deadspace volume VDANA of a patient, the apparatus comprising:
- a sensor adapted to measure a parameter indicative of a volume of gas exhaled by a patient during at least an exhalation phase of a respiratory cycle;
a gas analyzer adapted to measure a concentration of a gas constituent in such a patient'"'"'s flow of gas during an exhalation phase of a respiratory cycle; and
a controller operatively coupled to the sensor and the gas analyzer, wherein the controller determines such a patient'"'"'s anatomical deadspace volume based on signals provided by the sensor and the gas analyzer.
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Abstract
An apparatus and method for determining an anatomical deadspace volume VDANA of a patient. The apparatus includes a sensor that measures a parameter indicative of the volume of gas exhaled by the patient and a gas analyzer that measures a concentration of a gas constituent in the patient'"'"'s expiratory flow. A controller determines the patient'"'"'s anatomical deadspace volume based on signals provided by the sensor and the gas analyzer.
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28 Claims
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1. An apparatus for determining an anatomical deadspace volume VDANA of a patient, the apparatus comprising:
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a sensor adapted to measure a parameter indicative of a volume of gas exhaled by a patient during at least an exhalation phase of a respiratory cycle;
a gas analyzer adapted to measure a concentration of a gas constituent in such a patient'"'"'s flow of gas during an exhalation phase of a respiratory cycle; and
a controller operatively coupled to the sensor and the gas analyzer, wherein the controller determines such a patient'"'"'s anatomical deadspace volume based on signals provided by the sensor and the gas analyzer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of determining an anatomical deadspace volume VDANA of a patient, comprising:
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detecting a parameter indicative of a volume of gas exhaled by a patient;
detecting a concentration of a gas constituent in a flow of gas exhaled by such a patient; and
determining such a patient'"'"'s anatomical deadspace volume based on the detected parameter indicative of a volume of gas and the detected concentration of a gas constituent. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus for detecting an anatomical deadspace volume of a patient comprising:
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sensing means for detecting a parameter indicative of a volume of gas exhaled by a patient;
gas analyzing means for detecting a concentration of a gas constituent in the flow of gas exhaled by such a patient; and
processing means for determining such a patient'"'"'s anatomical deadspace volume based on the detected volumetric flow of gas and the detected concentration of a gas constituent. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification