Biosensor

• US 6,977,032 B2
• Filed: 11/12/2002
• Issued: 12/20/2005
• Est. Priority Date: 11/14/2001
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Yamamoto, Tomohiro, Ikeda, Shin, Yoshioka, Toshihiko, Hasegawa, Miwa
• Primary Examiner(s): Noguerola, Alex
• Application Number:
  US10/472,075
• Publication Number:
  US 20040096928A1
• Time in Patent Office: 1,134 Days
• Field of Search: 204/403.02, 204/403.04, 204/403.05, 204/403.09, 204/403.1, 204/403.14
• US Class Current: 204/403.05
• CPC Class Codes: C12Q 1/001 Enzyme electrodes
• 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 33/491 by separating the blood components G01N15/05 takes precedence

Abstract

A biosensor including an insulating base plate, an electrode system, a cover for covering the insulating base plate, at least one reaction layer, a sample solution supply pathway communicating with an air aperture at a terminal end side, a sample solution supply part and a filter provided between the sample solution supply pathway and the sample solution supply part to filter hemocytes, an end face and a top face of a primary portion of the filter are exposed and the sample solution supply part is provided adjacently to the primary side portion so as to provide an improved biosensor which allows easy addition of whole blood to the sensor and rapid supply of the added whole blood to a filter even in the case of collecting blood by fingertip centesis for measurement.

Claims

1. A biosensor comprising an insulating base plate, an electrode system including a measuring electrode and a counter electrode provided on said base plate, a cover for covering said insulating base plate, at least one reaction layer containing oxidoreductase and/or an electron mediator, a sample solution supply pathway including said electrode system and said reaction layer and communicating with an air aperture at a terminal end side, a sample solution supply part and a filter provided between said sample solution supply pathway and said sample solution supply part to filter hemocytes, said biosensor being capable of sucking plasma with hemocytes therein filtered with said filter into said sample solution supply pathway due to capillarity,

characterized in that a top face facing away from the base plate and an end face of a primary side portion of the filter are exposed to the outside and the sample solution supply part is formed adjacently to said primary side portion and defines a space located over said base plate,

a rail is provided from said sample solution supply part to said filter so that said sample solution is concentrated at the top face and the end face of said filter.

2. A biosensor comprising an insulating base plate, an electrode system including a measuring electrode and a counter electrode provided on said base plate, at least one reaction layer containing oxidoreductase and/or an electron mediator, a sample solution supply pathway including said electrode system and said reaction layer and an air aperture at a terminal end side, a sample solution supply part, and a filter provided between said sample solution supply pathway and said sample solution supply part to filter hemocytes, said biosensor being capable of sucking plasma which passes through said filter into said sample solution supply pathway due to capillarity,

wherein a top face and an end face of a primary side portion of the filter are exposed to the outside and the sample solution supply part is formed adjacently to said primary side portion,

a rail is provided from said sample solution supply part to said filter so that said sample solution is concentrated at the top face and the end face of said filter, and

said base plate has an aperture which forms a portion where said filter and said base plate do not contact each other.