System and method of metabolic rate measurement
First Claim
1. A method of metabolic rate measurement for an individual, the method comprising the steps of:
- measuring an exhaled gas volume for the individual using a spirometer having a flow path enclosed by a flow tube, and a flow sensor disposed in the flow path for sensing the exhaled gas flow from the individual, a display and a processor having a memory that processes a signal from the flow sensor;
determining a respired gas volume for the individual using the exhaled gas volume and a ventilatory equivalent; and
determining a metabolic rate for the individual from the respired volume.
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Accused Products
Abstract
A spirometer for determining a metabolic rate for an individual includes a flow pathway and a flow sensor disposed in the flow path, such that the flow sensor senses a flow rate of exhaled gas from the individual through the flow path. The spirometer also includes a processor having a memory in communication with the flow sensor. A method of metabolic rate measurement for the individual includes the steps of measuring an exhaled gas volume for the individual using the spirometer, determining a respired gas volume for the individual using the exhaled gas volume and a ventilatory equivalent, and determining a metabolic rate for the individual from the respired volume.
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Citations
30 Claims
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1. A method of metabolic rate measurement for an individual, the method comprising the steps of:
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measuring an exhaled gas volume for the individual using a spirometer having a flow path enclosed by a flow tube, and a flow sensor disposed in the flow path for sensing the exhaled gas flow from the individual, a display and a processor having a memory that processes a signal from the flow sensor;
determining a respired gas volume for the individual using the exhaled gas volume and a ventilatory equivalent; and
determining a metabolic rate for the individual from the respired volume. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29, 30)
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15. A method of determining the resting metabolic rate of a person using a flow meter, the method comprising:
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measuring an exhaled volume for the person using the flow meter;
determining a consumed volume of oxygen from the exhaled volume using a ventilatory equivalent for oxygen, the ventilatory equivalent for oxygen being determined in an initial procedure; and
determining the resting metabolic rate from the consumed value of oxygen.
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17. A method of determining a metabolic rate of a person, the method comprising the steps of
determining an exhaled volume; -
determining a component gas average concentration in the exhaled volume, wherein the component gas is either oxygen or carbon dioxide;
determining a component gas exhaled volume from the component gas average concentration and the exhaled volume;
estimating an inhaled volume for the person;
determining a component gas inhaled volume from the inhaled volume and a component gas inhaled concentration;
determining a difference volume between the component gas inhaled volume and the component gas exhaled volume; and
determining the metabolic rate of the person using the difference volume.
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18. A spirometer for determining a metabolic rate for an individual comprising:
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a flowpath;
a flow sensor disposed in said flow path, wherein said flow sensor senses a flow rate of exhaled gas from the individual through said flow path;
a processor having a memory in communication with said flow sensor, wherein said processor receives a signal from said flow sensor of flow rate, integrates the flow rate data, and determines a metabolic rate from a ventilatory equivalent and the flow rate measurement.
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27. A spirometer for determining a metabolic rate for an individual comprising:
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a flow path;
a flow sensor disposed in said flow path, wherein said flow sensor senses a flow rate of exhaled gas from the individual through said flow path;
a mixing chamber integral with said flow path and a gas component sensor disposed in said mixing chamber for sensing a composition of the exhaled gas, wherein the gases passing through the mixing chamber are mixed together;
a processor having a memory in communication with said gas component sensor and said flow rate sensor;
wherein said processor receives a signal from said flow sensor of flow rate and a signal from said gas component sensor that correlates the average concentration of the gas component within the respiration, integrates the flow rate data, determines oxygen consumption by subtracting the inhaled oxygen volume from the exhaled oxygen volume and determines a metabolic rate from the oxygen consumption.
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Specification