Valve-less mixing method and mixing device

A fluidic device for mixing a reagent fluid with a fluid sample, comprising:

• a supply channel having a reagent inlet for providing the reagent fluid in the supply channel and a sample inlet for providing the fluid sample in the supply channel;
• a first reagent storage for storing the reagent fluid, coupled to the supply channel;
• a mixer for mixing the reagent fluid with the fluid sample, having a mixer inlet and a mixer outlet, the mixer inlet coupled to the supply channel at a position in between the sample inlet and the first reagent storage;
• and
• wherein the fluidic device is configured such that in a first stage, when the reagent fluid is supplied in the reagent inlet, the reagent fluid is provided in the supply channel and the first reagent storage, and such that the reagent fluid is thereafter stationed in the supply channel and the first reagent storage until the fluid sample is provided in the sample inlet;
• and
• wherein the fluidic device is further configured such that in a second stage, when the fluid sample is supplied in the sample inlet, the supplied fluid sample and the stationed reagent fluid flows into the mixer thereby mixing both fluids.