Cartridge for a magnetic flow cytometer, a magnetic flow cytometer, and method for analysing a sample with such a cartridge

A cartridge for a magnetic flow cytometer, extending in an x-y-plane, comprising:

• an inlet for injecting a sample into the cartridge,
• a blister for a buffer solution with magnetic markers to mark pregiven particles of the sample,
• an outlet, and
• a fluid channel, the fluid channel comprising a first part that connects the inlet with the blister and a second part that connects the first part with the outlet, wherein
• the second part of the fluid channel comprises:
• an enrichment zone with mechanical guiding structures to focus marked particles of the sample in a predetermined subsection of the fluid channel, and
• a measuring zone between the enrichment zone and the outlet, the measuring zone comprising a magnetic field sensor in the predetermined subsection of the fluid channel,
• wherein the mechanical guiding structures comprise a multitude of elevations extending on a surface of the fluid channel on the x-y-plane, and
• wherein the multitude of elevations each comprise a v-shape, wherein each v-shape is symmetrically connected in a tip;
• wherein each tip of each v-shaped elevation is longitudinally aligned along a middle of the fluid channel;
• a number of the mechanical guiding structures comprised in the fluid channel decrease in multitude as the fluid channel gets closer to the measuring zone.