METHODS AND APPARATUSES FOR DETECTING ANALYTES
First Claim
Patent Images
1. An apparatus for measuring a quantity of an analyte contained in a breath sample, the apparatus comprising:
- a breath collection device comprising a breath inlet area, a breath outlet area, and a reaction chamber, the reaction chamber including a reagent that is colorimetrically reactive with the analyte; and
a measurement device comprising a light emitting device and a light measuring device, the measurement device being configured to receive the breath collection device so that the reagent is positioned to receive light from the light emitting device and reflect at least a portion of the received light to the light measuring device.
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Abstract
An apparatus for measuring a quantity of an analyte, such as an aldehyde, contained in a breath sample includes a breath collection device and a measurement device. The breath collection device includes a breath inlet area, a breath outlet area, and a reaction chamber. The reaction chamber can include a reagent that is colorimetrically reactive with one or more aldehydes. The measurement device includes a light emitting device and a light measuring device and is configured to provide a quantitative value indicative of the amount of aldehydes present in the breath sample.
61 Citations
19 Claims
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1. An apparatus for measuring a quantity of an analyte contained in a breath sample, the apparatus comprising:
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a breath collection device comprising a breath inlet area, a breath outlet area, and a reaction chamber, the reaction chamber including a reagent that is colorimetrically reactive with the analyte; and a measurement device comprising a light emitting device and a light measuring device, the measurement device being configured to receive the breath collection device so that the reagent is positioned to receive light from the light emitting device and reflect at least a portion of the received light to the light measuring device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. The apparatus of 1, further comprising a value generating device comprising an algorithm that generates a quantitative value based on one or colorimetric measurements taken by the measurement device on the reagent.
- 8. The apparatus of 7, further comprising a moisture reactivity measuring device, wherein the algorithm is configured to normalize the colorimetric measurements based on a measurement of an amount of moisture contained in the reagent.
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10. A breath collection device comprising:
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a tubular outer member having a first end portion and a second end portion, a breath inlet area having a first porous plug member positioned in the tubular outer member at the first end portion; a breath outlet area having a second porous plug member positioned in the tubular outer member at the second end portion, the second porous plug member having a first cylindrical portion with a first diameter and a second cylindrical portion with a second diameter, the second diameter being smaller than the first diameter; and a reaction chamber within the tubular outer member and located between the first and second porous plug members, the reaction chamber including a reagent that is colorimetrically reactive with one or more substances contained in the exhaled breath of a test subject, wherein the second cylindrical portion extends from the first cylindrical portion towards the first porous plug member. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An apparatus for measuring a quantity of an analyte contained in a breath sample, the apparatus comprising:
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a breath collection device comprising a breath inlet area, a breath outlet area, and a reaction chamber, the reaction chamber including a reagent that is colorimetrically reactive with the analyte; a measurement device comprising a light emitting device and a light measuring device, the measurement device being configured to receive the breath collection device so that the reagent is positioned to receive light from the light emitting device and reflect at least a portion of the received light to the light measuring device, the light measuring device being configured to take a plurality of reflectance measurements over a predetermined time period for at least two wavelength regions; and a measurement selection device configured to select one or more measurements taken by the measurement device to determine the quantity of the analyte, the measurement selection device being configured to select the one or more measurements based on a determination of a rate of change of reflectance of at least one of the at least two wavelength regions. - View Dependent Claims (18, 19)
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Specification