Device for monitoring sample-collection using a piston pump

摘要

The invention relates to a device (1) for monitoring sample-collection carried out using a piston pump (3, 8) such as a syringe, characterized in that said device includes a pressure sensor (11) close to the suction and/or delivery opening (6). Said device is in particular suited for use in an analysis automaton, in particular for analyzing a blood sample. Such a sensor guarantees that the liquid to be analyzed is properly sucked up, in particular that no air is sucked up and that neither the suction or delivery sides are blocked.

主权项

1. A pumping device (1) for an automated analysis system, with which it is possible to ensure that a liquid is pumped, notably sucked up and/or discharged, comprising:
a working chamber (3), the volume of which varies during pumping, a slidably and sealably mounted plunger (8) movably inserted in a first end of the working chamber so that the volume of the chamber varies according to the position of the plunger in the chamber, a pressure tap (11) positioned at a second end of the working chamber (3) opposite to the first end, and forming at least a part of an end wall of the working chamber, an orifice (6) defined in a longitudinal wall of the working chamber, the orifice defined so as to be substantially tangent to the pressure tap (11), and a conduit (4) opening through the orifice (6) into the chamber (3) through which suction can be applied.