VACUUM TEST TUBE FOR PRODUCING THROMBOCYTE ENRICHED AUTOLOGOUS PLASMA Russian patent published in 2021 - IPC A61M1/34 B01L3/14 

FIELD: medicine.

SUBSTANCE: invention refers to medicine and can be used for native blood sample splitting in order to obtain plasma with high thrombocyte content. Vacuum test tube consists of a cylindrical body with an inlet opening with a closing cover and a device for creating a vacuum. Body consists of three compartments connected to each other by means of plug-valves with possibility of rotation relative to each other. One compartment is provided with a cover rigidly connected therewith, having an inlet in the middle portion for inserting a blood sample by means of a syringe and provided with a membrane of resilient material, middle compartment is provided with an opening for extracting the prepared preparation using a syringe with a needle equipped with a plug from an elastic material, and the third compartment is equipped with a movable cylindrical bottom, connected to the compartment by a threaded connection, wherein the ratio of compartment volumes is equal to 4:1:4. Each plug-valve has corrugated outer surface and consists of two parts equipped with cavity with hole for fluid flow between compartments, both parts by means of sealing ring from resilient material are tightly connected to each other with possibility of rotation relative to each other. Each part of the plug-valve is rigidly connected to adjacent compartment, at that external walls of adjacent compartments and rifled surface of plug valves contain an indicator for visual observation of the position of holes of both parts of the plugs-valves, made in the form of diametrically located colored strips.

EFFECT: possibility of increasing concentration of thrombocytes in a closed circuit by varying the volume of the produced plasma after the first and second centrifugations.

3 cl, 6 dwg