Patent ID: 8877484

Claim:
A microfluidic device suitable for detecting a change in viscosity and/or surface tension of a sample, the microfluidic device comprising at least one test channel comprising an upper test channel section with an upstream end and a sampling region at its upstream end and at least one reference channel comprising an upper reference channel section with an upstream end and a sampling region at its upstream end, said sampling region of the test channel and said sampling region of the reference channel comprises a common sampling region, said test channel and said reference channel have a merging region downstream to said upper test channel section and a common downstream channel section and wherein the upper test channel section comprises at least one reagent selected from an agglutination reagent and a coagulation reagent and wherein the merging region and the common downstream channel section are arranged such that a reference liquid flowing from the upper reference channel section into the merging region will block a test liquid flow in the upper test channel section when said test liquid flow has not yet reached the merging section, wherein the upper test channel section and the upper reference channel section along the major part of their length, have a smallest cross sectional dimension which differs from each other with 100 μm or less.