A system for releasing platelets from a fluid comprising in particular megakaryocytic cells (Mk) comprising cytoplasmic extensions (Ck), said system comprising: - a device comprising: ∘ a platelet release reservoir comprising a first opening and a second opening, ∘ a first fluidic connecting element attached at the level of said first opening and adapted to inject said fluid into said reservoir, said first connecting element comprising an orifice for injecting the fluid into the platelet release reservoir and a portion narrowing towards said orifice, there being an abrupt widening of cross-section between the injection orifice and the reservoir, ∘ a second fluidic connecting element attached at the level of said second opening, said second connecting element comprising an orifice for discharging the fluid, - a device for pumping the fluid in fluidic communication with the reservoir by means of the second fluidic connecting element or the first fluidic connecting element, - a power supply module for the pumping device, - a programming system configured to control the power supply module for the pumping device, to implement one or more platelet release sequences designed to generate a continuous flow of the fluid between said injection orifice and said discharge orifice and vortex disturbances within the reservoir causing the fragmentation of the cytoplasmic extensions (Ck) of the megakaryocytic cells (Mk). - a device comprising: ∘ a platelet release reservoir comprising a first opening and a second opening, ∘ a first fluidic connecting element attached at the level of said first opening and adapted to inject said fluid into said reservoir, said first connecting element comprising an orifice for injecting the fluid into the platelet release reservoir and a portion narrowing towards said orifice, there being an abrupt widening of cross-section between the injection orifice and the reservoir, ∘ a second fluidic connecting element attached at the level of said second opening, said second connecting element comprising an orifice for discharging the fluid, ∘ a platelet release reservoir comprising a first opening and a second opening, ∘ a first fluidic connecting element attached at the level of said first opening and adapted to inject said fluid into said reservoir, said first connecting element comprising an orifice for injecting the fluid into the platelet release reservoir and a portion narrowing towards said orifice, there being an abrupt widening of cross-section between the injection orifice and the reservoir, ∘ a second fluidic connecting element attached at the level of said second opening, said second connecting element comprising an orifice for discharging the fluid, - a device for pumping the fluid in fluidic communication with the reservoir by means of the second fluidic connecting element or the first fluidic connecting element, - a power supply module for the pumping device, - a programming system configured to control the power supply module for the pumping device, to implement one or more platelet release sequences designed to generate a continuous flow of the fluid between said injection orifice and said discharge orifice and vortex disturbances within the reservoir causing the fragmentation of the cytoplasmic extensions (Ck) of the megakaryocytic cells (Mk).