Internal body temperature measurement device and internal body temperature measurement method

Patent metadata

Field	Value
Publication number	US-11883133-B2
Application number	US-201917252821-A
Country	US
Kind code	B2
Filing date	Jun 6, 2019
Priority date	Jun 27, 2018
Publication date	Jan 30, 2024
Grant date	Jan 30, 2024

Abstract

An in-vivo temperature measurement device includes a plurality of thermal resistors, temperature sensors for measuring an epidermis temperature of a living body, and temperature sensors for measuring an upper surface temperature that are provided at both ends of the thermal resistors, respectively, a memory that stores an estimation model of the core temperature of the living body that takes into consideration a non-thermal equilibrium state of the living body, and thermal resistance values of the thermal resistors, and an arithmetic circuit that estimates, based on the plurality of temperatures measured by the temperature sensors and the temperature sensors, the core temperature of the living body using the estimation model and the thermal resistance values, and the thermal resistance values are different from one another.

First claim

The invention claimed is:

1. An in-vivo temperature measurement device comprising:
a plurality of thermal resistors;
a plurality of first temperature sensors at a first end of the plurality of thermal resistors configured to face a living body;
a plurality of second temperature sensors provided at a second end of the plurality of thermal resistors opposite to the first end;
a memory configured to store an estimation model of a core temperature of the living body according to a non-thermal equilibrium state of the living body and thermal resistance values of the plurality of thermal resistors; and
an arithmetic circuit configured to estimate the core temperature of the living body based on the estimation model, the thermal resistance values, and a plurality of temperatures measured by the plurality of first temperature sensors and the plurality of second temperature sensors;
wherein the first temperature sensors are configured to measure a first temperature indicating an epidermis temperature of the living body;
wherein the second temperature sensors are configured to measure a second temperature at a position away from the living body;
wherein the thermal resistance values of the plurality of thermal resistors are different from one another; and
wherein the estimation model is represented by a following expression:

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Assignees

• Nippon Telegraph & Telephone

Inventors

• Matsunaga Daichi
• Tanaka Yujiro
• Seyama Michiko

Classifications

• A61B5/01 Primary

  Measuring temperature of body parts {; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue} (clinical contact thermometers G01K13/20) · CPC title

• A61B2562/0271

  Thermal or temperature sensors · CPC title

• G01K7/00

  Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat (giving results other than momentary value of temperature G01K3/00) {; Power supply therefor, e.g. using thermoelectric elements} · CPC title

• A61B5/6844

  Monitoring or controlling distance between sensor and tissue · CPC title

• A61B5/7275

  Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor · CPC title