Patent ID: 7553454

Claim:
A micro chip device, comprising: a first channel wherein buffer solution flows; a second channel wherein blood flows; a third channel connected with a downstream of said first and second channels wherein said buffer solution and said blood flow, forming layers having a longitudinal interface between said buffer solution and said blood; first solution supply means for controlling supply amount of said buffer solution; second solution supply means for controlling supply amount of said blood; a reaction portion located at said third channel which does not react to said buffer solution but reacts to said blood; wherein said longitudinal interface between said buffer solution and said blood laterally moves in said third channel according to a control of supply amount of said buffer solution by said first solution supply means and a control of supply amount of said blood by said second solution supply means; said reaction portion being an area coated with a coagulant, said coagulant does not react to said buffer solution but reacts to said blood so as to aggregate platelets; and said reaction portion being located at a wall face of said third channel which contacts said laterally moving interface.