Breath analyzer
First Claim
1. A breath analyzer comprising:
- a light source that emits infrared light of a wavelength band including an absorption line for acetone;
a gas cell to which a breath-containing sample gas is introduced, and on which the infrared light is incident;
a detection unit that receives transmitted light emerging from the gas cell, and outputs a sample signal value corresponding to an acetone discharge amount; and
a data processing unit that, on the basis of the sample signal value, determines an approximation formula of dependence of fat oxidation rate on acetone discharge amount in advance, and calculates a fat oxidation rate for individual sample signal values using the approximation formula,the fat oxidation rate (milligram/min) y being approximated by a following formula;
y=Ax+B, where x is the acetone discharge amount (microliter/min), A is 6 or more and 7 or less, and B is 0 or more and 50 or less.
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Accused Products
Abstract
A breath analyzer includes a light source, a gas cell, a detection unit and a data processing unit. The light source emits infrared light of a wavelength band including an absorption line for acetone. A breath containing sample gas is introduced to the gas cell. The infrared light is incident on the gas cell. The detection unit receives transmitted light emerging from the gas cell, and outputs a sample signal value corresponding to an acetone discharge amount. The data processing unit determines an approximation formula of dependence of fat oxidation rate on acetone discharge amount in advance, and calculates a fat oxidation rate for individual sample signal values using the approximation formula. When the acetone discharge amount (microliter/min) is x, the fat oxidation rate (milligram/min) y is approximated by a following formula: y=Ax+B (where A and B are constants).
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Citations
15 Claims
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1. A breath analyzer comprising:
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a light source that emits infrared light of a wavelength band including an absorption line for acetone; a gas cell to which a breath-containing sample gas is introduced, and on which the infrared light is incident; a detection unit that receives transmitted light emerging from the gas cell, and outputs a sample signal value corresponding to an acetone discharge amount; and a data processing unit that, on the basis of the sample signal value, determines an approximation formula of dependence of fat oxidation rate on acetone discharge amount in advance, and calculates a fat oxidation rate for individual sample signal values using the approximation formula, the fat oxidation rate (milligram/min) y being approximated by a following formula;
y=Ax+B,where x is the acetone discharge amount (microliter/min), A is 6 or more and 7 or less, and B is 0 or more and 50 or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A breath analyzer comprising:
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a light source that emits infrared light of a wavelength band including an absorption line for acetone; a gas cell to which a breath-containing sample gas is introduced, and on which the infrared light is incident; a detection unit that receives transmitted light emerging from the gas cell, and outputs a sample signal value corresponding to an acetone concentration; and a data processing unit that, on the basis of the sample signal value, determines an approximation formula of dependence of fat oxidation rate on acetone concentration in advance, and calculates an acetone concentration for individual sample signal values using the approximation formula, the fat oxidation rate (milligram/min) y being approximated by a following formula;
y=Cx+D,where x is the acetone concentration (ppm), C is 40 or more and 60 or less, and D is 0 or more and 50 or less. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification