Patent ID: 8702976

Claim:
A hand-held microfluidic testing device comprising: a. a housing, wherein said housing comprises at least one cartridge receiving port; b. at least one cartridge for input to said at least one cartridge receiving port, wherein said at least one cartridge comprises at least one separation channel, wherein said separation channel comprises a continuously varying geometry along an x-axis, wherein said continuously varying geometry is disposed to provide a continuous distribution of velocities along a y-axis of said channel of a moving solution, wherein said moving solution moves in a continuous x-direction, wherein curved channel walls provide longer path lengths along said channel walls than path lengths along a center of said channel, wherein said distribution of velocities along said y-axis separates larger particles from smaller particles; and c. an optical detection system in said housing, wherein said optical detection system is disposed to analyze at least one sample in said at least one cartridge.