Glucose strip sensor and glucose measurement using the glucose strip sensor

• US 20040146958A1
• Filed: 12/30/2003
• Published: 07/29/2004
• Est. Priority Date: 07/07/2001
• Status: Active Grant

• Current Assignee: Osang Healthcare Co., Ltd.
• Original Assignee: INFOPIA CO., LTD
• Inventors: Kang, Byung-Soo, Lee, Seong-Dong, Park, Seong-Gi, Kwon, Mi-Joong, Bae, Byung-Woo
• Granted Patent: US 7,297,248 B2
• Time in Patent Office: Days
• US Class Current: 435/14
• CPC Class Codes: G01N 27/3272 Test elements therefor, i.e. disposable laminated substrates with electrodes, reagent and channels optical biosensors G01N33/52
• CPC Class Codes: G01N 33/66 involving blood sugars, e.g. galactose

Abstract

Disclosed is a disposable glucose strip sensor configured to rapidly and conveniently measure the concentration of glucose in blood and a glucose measurement method using the glucose strip sensor. In the glucose strip sensor, at least one checking electrodes are additionally provided at an electrode section including an operating electrode and a counter electrode. The checking electrode serves to check whether or not it is electrically connected with the counter electrode, upon measuring the concentration of glucose in a blood sample introduced in the sensor. Where two checking electrodes are provided, it may be checked whether or not an electrical connection is established between those checking electrodes. Based on the result of the checking, it is possible to determine whether or not a sufficient amount of blood sample is filled in the sensor. Accordingly, the measurement of glucose concentration can be accurately achieved.

Claims

1. A glucose strip sensor comprising a non-conductive substrate, a lead section formed on the substrate, the lead section including leads and lead terminals, an electrode section formed on the lead section and provided at an upper surface thereof with a reaction layer, the electrode section including an operating electrode, a counter electrode, and a checking electrode, a resin plate adapted to define, over the electrode section, a space for receiving a blood sample, a cover formed on the resin plate, a sample introducing port adapted to introduce the blood sample into the space, and discharge ports adapted to vent air from the space, wherein:

the electrode section further includes at least one is checking electrode adapted to check whether or not the blood sample is completely introduced in the space; and

the lead section further includes a lead and a lead terminal for the checking electrode.

2. The glucose strip sensor according to claim 1, wherein the sample introducing port is arranged at a front surface of the sensor, and the discharge ports are arranged at opposite side surfaces of the sensor, respectively.

3. The glucose strip sensor according to claim 1 or 2, wherein:

the counter electrode is arranged near the sample introducing port, and the checking electrode is arranged in rear of the operating electrode;

or

the checking electrode is arranged near the sample introducing port, and the counter electrode is arranged in rear of the operating electrode.

4. The glucose strip sensor according to claim 1 or 2, wherein:

the counter electrode is arranged at the sample introducing port, and the checking electrode is arranged at one of the discharge ports;

or

the counter electrode is arranged at one of the discharge ports, and the checking electrode is arranged at the sample introducing port.

5. A glucose measurement method comprising the steps of:

introducing a blood sample into the glucose strip sensor according to claim 1 or 2;

checking whether or not an electrical connection is established between the counter electrode and the checking electrode included in the glucose strip sensor or between the determining whether or not the blood sample is introduced in the space in a sufficient amount; and

if it is determined the blood sample is introduced in the space in a sufficient amount, then measuring a glucose concentration of the blood sample in accordance with a well-known method.