公开(公告)号：US20200178858A1

公开(公告)日：2020-06-11

申请号：US16338550

申请日：2017-09-19

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tomoya NAKAZAWA ,  Rui SEKINE ,  Masato KITABAYASHI ,  Anna IENAKA ,  Yu HASHIMOTO

IPC: A61B5/145 ,  A61B5/1455 ,  A61B5/00

Abstract: A blood glucose measurement device, a blood glucose calculation method, and a blood glucose calculation program capable of accurately measuring a blood glucose level by using light are provided. The blood glucose measurement device includes a light source 11 that outputs measurement light L1 to be input to a living body 50; a light detector 12 that detects the measurement light L1 propagated inside the living body 50 and generates a detection signal in accordance with an intensity of the measurement light L1; and a computation unit that obtains a time lag between a temporal change in a first parameter related to an oxygenated hemoglobin concentration and a temporal change in a second parameter related to a deoxygenated hemoglobin concentration based on the detection signal, and obtains the data related to the blood glucose level based on the time lag.

公开(公告)号：US20240423537A1

公开(公告)日：2024-12-26

申请号：US18705020

申请日：2022-08-10

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tomoya NAKAZAWA ,  Rui SEKINE ,  Masato KITABYASHI ,  Yu HASHIMOTO ,  Anna IENAKA

IPC: A61B5/00 ,  A61B5/145 ,  A61B5/1455

Abstract: A metabolism measurement apparatus includes, a photodetector that detects measurement light propagating through the living body and generates a detection signal according to an intensity of the measurement light, and a calculator. The calculator calculates a first parameter and a second parameter based on the detection signal. Each of the first parameter and the second parameter is a temporal relative change amount depending on a concentration of each of O2Hb and HHb in blood and a volume of a blood vessel in an optical path. The calculator obtains, based on the first parameter and the second parameter, a numerical value regarding a concentration of HHb in blood from which an influence of the volume of the blood vessel in the optical path is excluded. The calculator obtains data regarding a degree of metabolism based on the numerical value.