Patent ID: 6966977
Filing Date: 2005-11-22
Classification: C12Q,G01N

Abstract:
1. A biosensor comprising: an insulating base plate; an electrode system having a measuring electrode and a counter electrode provided on said base plate; a reaction layer comprising at least an oxidoreductase and an electron mediator; a sample solution supply pathway including said electrode system and said reaction layer; a sample supply unit; and a filter provided between said sample supply unit and said sample solution supply pathway for filtering out hemocytes of a blood, wherein plasma of said blood, with said hemocytes having been filtered out by said filter, is sucked into the inside of said sample solution supply pathway owing to capillary phenomena, wherein said filter has, at an upstream side thereof, a cross-sectional area larger than a cross-sectional area of an opening of said sample solution supply pathway, and also larger than a cross-sectional area at a downstream side thereof, said downstream side being positioned at said opening of said sample solution supply pathway.