Blood sugar level measuring apparatus
First Claim
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1. A blood sugar level measuring apparatus comprising:
- a heat amount measuring unit for measuring a plurality of temperatures derived from the body surface in order to obtain information used for calculating the amount of convective heat transfer and the amount of radiation heat transfer concerning the dissipation of heat from the body surface;
an oxygen volume measuring unit for obtaining information concerning the volume of blood oxygen;
a storage unit for storing the relationships between blood sugar levels and the individual parameters corresponding to both the multiple temperatures and blood oxygen volume;
a computing unit for converting the measurement values provided by the heat amount measuring unit and the oxygen volume measuring unit into parameters, and computing a blood sugar level by applying the parameters to the relationships stored in the storage unit; and
a display unit for displaying the blood sugar level computed by the computing unit.
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Abstract
Blood sugar levels are non-invasively measured based on temperature measurements. Blood sugar levels obtained by non-invasive measurements of temperatures are corrected by blood oxygen saturation and the volume of blood flow so that the measurement data can be stabilized.
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Citations
21 Claims
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1. A blood sugar level measuring apparatus comprising:
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a heat amount measuring unit for measuring a plurality of temperatures derived from the body surface in order to obtain information used for calculating the amount of convective heat transfer and the amount of radiation heat transfer concerning the dissipation of heat from the body surface; an oxygen volume measuring unit for obtaining information concerning the volume of blood oxygen; a storage unit for storing the relationships between blood sugar levels and the individual parameters corresponding to both the multiple temperatures and blood oxygen volume; a computing unit for converting the measurement values provided by the heat amount measuring unit and the oxygen volume measuring unit into parameters, and computing a blood sugar level by applying the parameters to the relationships stored in the storage unit; and a display unit for displaying the blood sugar level computed by the computing unit. - View Dependent Claims (2, 3)
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4. A blood sugar level measuring apparatus comprising:
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a heat amount measuring unit for measuring a plurality of temperatures derived from the body surface in order to obtain information used for calculating the amount of convective heat transfer and the amount of radiation heat transfer concerning the dissipation of heat from the body surface; an oxygen volume measuring unit for obtaining information concerning the volume of blood oxygen, wherein the oxygen volume measuring unit comprises a blood flow volume measuring unit for obtaining information concerning the volume of blood flow, and an optical measuring unit for obtaining blood hemoglobin concentration and hemoglobin oxygen saturation, wherein the blood flow volume measuring unit comprises a body-surface contact unit;
an indirect temperature detector for detecting the temperature at a position distanced away from the body-surface contact unit; and
a heat conducting member connecting the body-surface contact unit and the indirect temperature detector;a storage unit for storing the relationships between blood sugar levels and the individual parameters corresponding to both the multiple temperatures and blood oxygen volume; a computing unit for converting the measurement values provided by the heat amount measuring unit and the oxygen volume measuring unit into parameters, and computing a blood sugar level by applying the parameters to the relationships stored in the storage unit; and a display unit for displaying the blood sugar level computed by the computing unit. - View Dependent Claims (5, 6, 7)
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8. A non-invasive blood sugar level measuring apparatus comprising:
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a temperature measuring unit for measuring a plurality of temperatures from a body surface; a blood flow volume measuring unit for obtaining information concerning the volume of blood flow based on the results of measurement by the temperature measuring unit; an oxygen volume measuring unit for determining the volume of blood oxygen based on the result of measurement by the blood flow volume measuring unit; a storage unit for storing the relationships between blood sugar levels and individual parameters corresponding to the multiple temperatures, the volume of blood oxygen and the volume of blood flow; a computing unit for converting the measurement values provided by the temperature measuring unit, the blood flow volume measuring unit and the oxygen volume measuring unit into parameters, and computing a blood sugar level by applying the parameters to the relationships stored in the storage unit; and a display unit for displaying the blood sugar level computed by the computing unit. - View Dependent Claims (9, 10, 11)
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12. A blood sugar level measuring apparatus comprising:
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an ambient temperature measuring unit for measuring the ambient temperature; a body-surface contact unit to be brought into contact with a body surface; a radiation heat detector for measuring the radiation heat from the body surface; a heat conducting member disposed in contact with the body-surface contact unit; an indirect temperature detector disposed adjacent the heat conducting member and away from the body-surface contact unit for detecting the temperature at a position distanced away from the body-surface contact unit; a light source for irradiating the body-surface contact unit with light of at least two different wavelengths; a photodetector for detecting reflected light produced as the light from the light source is reflected by the body surface; a computing unit comprising a converting portion and a processing portion, wherein the converting portion converts the outputs of the indirect temperature detector, the ambient temperature measuring unit, the radiation heat detector, and the photodetector into individual parameters, and wherein the processing portion stores the relationships between the parameters and blood sugar levels in advance and computes a blood sugar level by applying the parameters to the stored relationships; and a display unit for displaying the blood sugar level produced by the computing unit. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A blood sugar level measuring apparatus comprising:
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an ambient temperature measuring unit for measuring the ambient temperature; a body-surface contact unit to be brought into contact with a body surface; a heat conducting member disposed in contact with a first region of the body-surface contact unit; an indirect temperature detector disposed adjacent the heat conductive member and away from the body-surface contact unit for detecting the temperature at a position distanced away from the body-surface contact unit; a cylindrical member disposed in contact with a second region of the body-surface contact unit and having an opening on one end thereof; a radiation heat detector disposed adjacent the other end of the cylindrical member for measuring the radiation heat from the body surface; a light source for irradiating the one end of the cylindrical member with light of at least two different wavelengths; a photodetector for detecting reflected light produced by the reflection of the light by the body surface; a computing unit comprising a converting portion and a processing portion, wherein the converting portion converts the outputs of the indirect temperature detector, the ambient temperature measuring unit, the radiation temperature detector, and the photodetector into individual parameters, and wherein the processing portion stores the relationships between the parameters and blood sugar levels in advance and computes a blood sugar level by applying the parameters to the relationships; and a display unit for displaying the blood sugar level produced by the computing unit. - View Dependent Claims (19, 20, 21)
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Specification