BIOLOGICAL SAMPLE MEASURING DEVICE

• US 20130266482A1
• Filed: 01/16/2012
• Published: 10/10/2013
• Est. Priority Date: 02/02/2011
• Status: Active Grant

• Current Assignee: PHC Holdings Corporation
• Original Assignee: Panasonic Healthcare Holdings Co., Ltd.
• Inventors: Shinno, Teppei, Yoshioka, Eriko, Miki, Takashi, Hironaka, Shouko
• Granted Patent: US 9,039,974 B2
• Time in Patent Office: Days
• US Class Current: 422/82.01
• CPC Class Codes: G01N 27/3271 Amperometric enzyme electrodes for analytes in body fluids, e.g. glucose in blood amperometry per se G01N27/49; aspects concerning the enzyme reagent C12Q1/001
• CPC Class Codes: G01N 27/3273 Devices therefor, e.g. test element readers, circuitry details not specific to biochemical electrodes G01N33/4875
• CPC Class Codes: G01N 33/66 involving blood sugars, e.g. galactose

Abstract

This biological sample measuring device comprises a mounting portion (4) to which a biological sample measuring sensor (3) is mounted, a voltage application section (12) that applies voltage to a counter electrode (8) of the biological sample measuring sensor (3) mounted to the mounting portion (4), amplifiers (14 and 15) that are selectively connected to a working electrode (9) of the biological sample measuring sensor (3), and a determination section (19) that is connected to these amplifiers (14 and 15). The determination section (19) has a threshold determination section (21) that determines a voltage value obtained by voltage conversion of the current value of the working electrode (9), a same determination section (22) that selectively connects the amplifiers (14 and 15) to the working electrode (9) depending on the determination of the threshold determination section (21), and identifies the sample deposited on the biological sample measuring sensor (3) from the output of the selected amplifier (14 or 15), and an output section that outputs a measurement value corresponding to the identified sample.

Claims

1. A biological sample measuring device, comprising:

a mounting portion to which is mounted a biological sample measuring sensor on which is deposited a biological sample that reacts with a reagent provided on an electrode section including at least a working electrode and a counter electrode;

a voltage application section that applies voltage to the electrode section of the biological sample measuring sensor mounted to the mounting portion;

a first amplifier that is selectively connected to the electrode section of the biological sample measuring sensor, amplifies a signal outputted from the electrode section, and amplifies the signal at a first amplitude;

a second amplifier that is selectively connected to the electrode section of the biological sample measuring sensor, amplifies a signal outputted from the electrode section, and amplifies the signal at a second amplitude that is greater than the first amplitude; and

a controller that compares the value of the output signal outputted from the electrode section with a preset threshold, and selectively uses either the first amplifier or the second amplifier.

2. The biological sample measuring device according to claim 1,

wherein the controller determines the type of biological sample on the basis of the output result outputted from either the first amplifier or the second amplifier.

3. The biological sample measuring device according to claim 2,

wherein the controller detects the slope in a specific time band in a graph of the output result, and determines whether the biological sample deposited on the biological sample measuring sensor is a blood sample or a control liquid.

4. The biological sample measuring device according to claim 1,

wherein the controller measures the concentration of the biological sample on the basis of the output result outputted from the first amplifier or the second amplifier.

5. The biological sample measuring device according to claim 4,

wherein the controller selects between the first and second amplifiers by comparing the threshold with the output result of a voltage pattern used for biological sample detection and applied prior to measurement of the concentration of the biological sample.