Blood measuring instrument

• US 6,349,230 B1
• Filed: 06/02/2000
• Issued: 02/19/2002
• Est. Priority Date: 02/26/1998
• Status: Expired due to Term

• Current Assignee: Kyoto Daiichi Kagaku Company Limited
• Original Assignee: Kyoto Daiichi Kagaku Company Limited
• Inventors: Kawanaka, Shoji
• Primary Examiner(s): Nasser, Robert L.
• Assistant Examiner(s): MALLARI, PATRICIA C
• Application Number:
  US09/555,693
• Time in Patent Office: 627 Days
• Field of Search: 600/347, 600/345, 600/365, 204/403
• US Class Current: 600/347
• CPC Class Codes: A61B 5/1486 using enzyme electrodes, e.g. with immobilised oxidase
• CPC Class Codes: G01N 27/3272 Test elements therefor, i.e. disposable laminated substrates with electrodes, reagent and channels optical biosensors G01N33/52

Abstract

A blood measuring instrument for measuring a specific component of blood. The instrument has a platelike chip (2) for sucking sampled blood, and a measuring instrument body (1) including a connector (3) into which the chip (2) is plugged. The chip (2) has an enzyme electrode for delivering a response current when the enzyme reacts with a specific component of the blood. The measuring instrument body (1) includes two sets of connection terminals (21, 22) capable of being in contact with lead terminals on the chip (2), and the connection terminals (21, 22) of each set are opposed to each other. Therefore, the chip (2) can be plugged into the connector (3) and one of the connection terminals of each set can be brought into contact with the lead terminal even if the chip is upside down.

Claims

1. A blood measuring instrument comprising:

a plate-like chip for drawing sampled blood; and

a main detecting unit having a connector into which the chip is inserted;

wherein the chip includes, on a single side, an enzyme electrode section for passing a response current in response to a specific component of the blood, and lead terminals electrically connected to the enzyme electrode section; and

wherein the main detecting unit includes two sets of connection terminals which are disposed within the connector and engageable with the lead terminals of the chip, the two sets of connection terminals being spaced from each other in a thickness direction of the chip and held in facing relation to each other.

2. The blood measuring instrument according to claim 1, wherein the enzyme electrode section comprises a reaction layer dissolved by the blood and an electrode pattern which includes an operational terminal for passing the response current and a counterpart terminal surrounding the operational terminal, the reaction layer covering the operational terminal of the electrode pattern.

3. The blood measuring instrument according to claim 1, wherein the reaction layer contains glucose oxidase as an oxidase and potassium ferricyanide as an electron acceptor.

4. The blood measuring instrument according to claim 1, wherein the reaction layer contains lactate oxidase as an oxidase and potassium ferricyanide as an electron acceptors.