Stago International

Biocytex

Michel Canton

Alain Rousseau

Isabelle Besson-Faure

A device for dosing at least a particular constituent in a product sample has a receptacle and a cover assembled to form a closed container having a vertical axis. The receptacle and cover bear coaxial cylindrical walls defining concentric annular chambers inside the container, the walls separating chambers each having an opening, the cover and the container being rotatable relative to each other about the vertical axis, said openings being placed in a predetermined manner so that by relative displacement of the walls, the openings are positioned in a straight line or offset to communicate, or isolate said successive chambers. A method for using such a device and an apparatus for implementing said method are disclosed.

Device, method and apparatus for implementing the method, for dosing at least a particular constituent in a product sample

The present invention relates to a method of determining, on a test sample, the occupation of the cellular GPIIb/IIIa receptor by an antagonist of fibrinogen, characterized in that the number of receptors occupied is determined in the said sample with the aid of an antibody MAb1 which is a competitor for the antagonist, and the total number of occupied or unoccupied receptors is determined with the aid of a so-called noncompetitor antibody MAb2 specific for the occupied or unoccupied receptor and the rate of occupation of the GPIIb/IIIa receptors in the sample is deduced therefrom.

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Cassis, France

Michel Canton