DEVICE AND METHOD FOR ACCURATELY MEASURING CONCENTRATION OF BLOOD COMPONENT

• US 20100234711A1
• Filed: 05/07/2010
• Published: 09/16/2010
• Est. Priority Date: 11/09/2007
• Status: Active Grant

• Current Assignee: Omron Healthcare Company Limited (Omron Corporation)
• Original Assignee: Omron Healthcare Company Limited (Omron Corporation)
• Inventors: NAKAJIMA, Satoshi, TOKITA, Muneo, SUGENOYA, Junichi, NAKASE, Yuzo
• Granted Patent: US 8,391,946 B2
• Time in Patent Office: Days
• US Class Current: 600/365
• CPC Class Codes: A61B 2560/0443 Modular apparatus
• CPC Class Codes: A61B 5/14521 using means for promoting sweat production, e.g. heating the skin measuring sweat secretion A61B5/4266
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1486 using enzyme electrodes, e.g. with immobilised oxidase
• CPC Class Codes: A61B 5/681 Wristwatch-type devices
• CPC Class Codes: A61B 5/6828 Leg
• CPC Class Codes: A61B 5/6831 Straps, bands or harnesses

Abstract

In a measurement computation device arranged in a measurement device, an elapse of a predetermined time is detected after acceleration of perspiration, and a concentration of a first component in the perspiration obtained thereafter is converted to concentration of the first component in blood.

Claims

1. A blood component concentration measurement device comprising:

a perspiration accelerating unit arranged to accelerate perspiration from a surface of a body or a measurement site;

a first measurement unit arranged to measure a concentration in the perspiration of a first component contained in the perspiration from the surface of the body or the measurement site;

a detecting portion arranged to detect an elapse of a predetermined time after acceleration of the perspiration; and

a converting portion arranged to convert the concentration in the perspiration of the first component contained in the perspiration from the surface of the body or the measurement site after elapse of the predetermined time to concentration of the first component in blood of the body;

wherein

the detecting portion includes;

a calculating portion arranged to calculate a rate of change of the concentration of a component in the perspiration, and

a determining portion arranged to compare the rate of change and a threshold value and to determine the elapse of the predetermined time when the rate of change is smaller than the threshold value.

2. The blood component concentration measurement device according to claim 1, wherein the calculating portion is arranged to calculate the rate of change of the concentration in the perspiration of the first component as the component of the perspiration.

3. The blood component concentration measurement device according to claim 1, wherein the first component is sugar.

4. The blood component concentration measurement device according to claim 1, further comprising:

a second measuring unit arranged to measure the concentration in the perspiration of a second component, different from the first component, contained in the perspiration from the surface of the body or the measurement site;

wherein

the calculating portion is arranged to calculate the rate of change of the concentration in the perspiration of the second component as the component of the perspiration.

5. The blood component concentration measurement device according to claim 4, wherein the second component is a component in which relevance between a change in concentration in the perspiration and a change in concentration of the first component in the blood is lower than a predetermined correlation coefficient.

6. The blood component concentration measurement device according to claim 4, wherein the first component is sugar, and the second component is at least one of glutamine acid, lysine, glutamine, asparagine acid, calcium, and kalium.

7. A blood component measurement method performed by a blood component concentration measurement device which includes an acquiring device arranged to acquire perspiration from a measurement site, a detection device arranged to detect a component in the perspiration, and a computation device arranged to perform a computation using a value obtained from the component, the method comprising the steps of:

calculating a rate of change of concentration of a component in the perspiration with the computation device;

detecting a first component from the perspiration with the detection device after the rate of change and a threshold value are compared and the rate of change becomes smaller than the threshold value;

calculating a concentration in the perspiration of the first component with the computation device;

converting the calculated concentration in the perspiration of the first component to a concentration of the first component in blood of a body; and

executing a process of outputting the concentration in the blood of the first component with the computation device.