FIELD: medicine.
SUBSTANCE: present invention relates to a separation body for separation of blood plasma and blood cells in a test-tube for blood sampling. Separating body has floating body (110) with first density and at least one through hole (112). Along with buoyant body separating body (100) has ballast body (120) with second density, which is greater than first density. Total density of separating body, that is floating body and ballast body together, is between plasma density and density of cells in blood. Floating body (110) forms together with ballast body (120) a valve. Floating body and ballast body can displace relative to each other.
EFFECT: according to the invention, the ballast body has at least one locking element (122, 124) for opening or closing through hole (112) in the floating body.
15 cl, 13 dwg
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