# US 9,433,385 B2 · Blood sugar level measuring device and blood sugar level measuring method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,433,385 B2 - Document ID: US9433385B2 - Status: Granted - Kind: B2 - Application number: 14/600,467 - Filed: 2015-01-20 - Published: 2015-08-06 - Granted: 2016-09-06 - Earliest claimed: 2014-01-31 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Hirokazu Kasahara; Kimitake Mizobe; Hideto Ishiguro - Web page: https://patentgrep.com/patent/US9433385B2 ## CPC - A61B 5/7275: {Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor} - A61B 5/1118: {Determining activity level} - A61B 5/14532: {for measuring glucose, e.g. by tissue impedance measurement} - A61B 5/1455: using optical sensors, e.g. spectral photometrical oximeters - A61B 5/1495: Calibrating or testing of in-vivo probes - A61B 5/4866: {Evaluating metabolism (using breath test A61B5/083)} - A61B 5/681: {Wristwatch-type devices} - G16H 40/63: for local operation - A61B 2560/0209: adapted for power saving - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA ## Abstract In a blood sugar level measuring device, a blood-sugar-level predicting unit predicts a blood sugar level of a user. A light emitting unit irradiates measurement light to the inside of a living organism of the user. A light-emission control unit, a measurement-point-candidate setting unit, a light-amount-control-method determining unit, and a measurement-point selecting unit control a light amount of measurement light per one measurement on the basis of the predicted blood sugar level. A light-reception control unit, a light-absorption-spectrum generating unit, and a blood-sugar-value calculating unit receive reflected light from the user and measure a blood sugar level. ## Claims ### Claim 1 A blood sugar level measuring device comprising: a predicting unit configured to predict a blood sugar level of a user; a light emitting unit for irradiating measurement light to an inside of a living organism of the user; a light-amount control unit configured to control a light amount of the measurement light per one measurement on the basis of the predicted blood sugar level; and a measuring unit configured to receive reflected light from the user and measure a blood sugar level. ### Claim 2 (depends on 1) The blood sugar level measuring device according to claim 1, wherein the predicting unit predicts a blood sugar level of the user on the basis of a blood sugar level measured in past by the measuring unit. ### Claim 3 (depends on 2) The blood sugar level measuring device according to claim 2, wherein the predicting unit predicts a blood sugar level of the user on the basis of a transition of the blood sugar level measured in the past. ### Claim 4 (depends on 2) The blood sugar level measuring device according to claim 2, wherein the predicting unit predicts, as a blood sugar level of the user, a blood sugar level measured immediately before the prediction. ### Claim 5 (depends on 1) The blood sugar level measuring device according to claim 1, wherein the predicting unit adjusts the predicted blood sugar level on the basis of at least any one of presence or absence of a meal of the user and presence or absence of insulin administration. ### Claim 6 (depends on 5) The blood sugar level measuring device according to claim 5, wherein the predicting unit adjusts the predicted blood sugar level on the basis of dietary content of the user. ### Claim 7 (depends on 1) The blood sugar level measuring device according to claim 1, further comprising a body-motion detecting unit for detecting a body motion of the user, wherein the predicting unit adjusts the predicted blood sugar level on the basis of a detection result of the body-motion detecting unit. ### Claim 8 (depends on 1) The blood sugar level measuring device according to claim 1, wherein the light-amount control unit controls, when the predicted blood sugar level is in a first range, a light amount of the measurement light using a first light amount control method and controls, when the predicted blood sugar level is in a second range higher than the first range, alight amount of the measurement light using a second light amount control method with power consumption smaller than power consumption in the first light amount control method. ### Claim 9 (depends on 8) The blood sugar level measuring device according to claim 8, further comprising an error calculating unit configured to calculate a prediction error of the predicted blood sugar level on the basis of a blood sugar level measured by the measuring unit under the light amount control performed by the light-amount control unit using the second light amount control method, wherein when a predetermined condition indicating that the prediction error is relatively large is satisfied, the measuring unit measures a blood sugar level of the user again under the light amount control performed by the light-amount control unit using the first light amount control method. ### Claim 10 (depends on 8) The blood sugar level measuring device according to claim 8, wherein the light amount control methods is defined by at least one of the number of light emitting elements configuring the light emitting unit, an amount of electric current supplied to the light emitting unit, an exposure time of the light emitting unit, and measurement wavelength width of the measurement light. ### Claim 11 A blood sugar level measuring method comprising: predicting a blood sugar level of a user; irradiating measurement light to an inside of a living organism of the user; controlling a light amount of the measurement light per one measurement on the basis of the predicted blood sugar level; and receiving reflected light from the user and measuring a blood sugar level.