Patent ID: 6954661

Claim:
A blood sugar level measuring apparatus comprising: (1) a heat amount measuring unit for measuring a plurality of temperatures derived from a 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; (2) a blood flow volume measuring unit for obtaining information concerning the volume of blood flow, the blood flow volume measuring unit comprising a body-surface contact unit, an adjacent-temperature detector disposed adjacent to the 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 with the indirect-temperature detector; (3) an optical measuring unit for obtaining the hemoglobin concentration and hemoglobin oxygen saturation in blood, the unit including a light source for generating light of at least three different wavelengths, an optical system for irradiating the body surface with light emitted by the light source, and at least three different photodetectors for detecting the light that has been shone on the body surface; (4) a storage unit for storing relationships between individual parameters corresponding to the plurality of temperatures, blood flow volume, hemoglobin concentration and hemoglobin oxygen saturation in blood, and blood sugar levels; (5) a computing unit for converting measurement values provided by the heat amount measuring unit, the blood flow volume measuring unit, and the optical measuring unit into parameters, and computing a blood sugar level by applying the parameters to the relationships stored in the storage unit; and (6) a display unit for displaying the blood sugar level computed by the computing unit.