Microfluidic device, system, and method for reversing a flow through a microfluidic channel

A microfluidic device for reversing a flow through a microfluidic channel, comprising:

• a first microfluidic channel extending between a first inlet and a first outlet;
• a second microfluidic channel which fluidically connects a first point of the first microfluidic channel to a second outlet via a first valve;
• a third microfluidic channel which fluidically connects a second point of the first microfluidic channel to a second inlet via a second valve, the second point being located between the first point and the first outlet;
• wherein the first valve and the second valve are configured to be initially closed to prevent fluid from the first microfluidic channel to reach the second outlet and the second inlet, respectively, such that, during use, fluid initially flows in the first microfluidic channel in a first direction from the first inlet to the first outlet;
• and
• at least one circuit configured to open the first valve and configured to open the second valve;
• wherein the at least one circuit is configured to trigger the first valve to be opened by using electrical signals;
• wherein, upon the at least one circuit opening the first valve and the second valve during use, a flow direction through the first microfluidic channel between the first point and the second point is reversed from the first direction to a second direction as fluid flows from the second inlet via the first microfluidic channel to the second outlet.