System for the analysis of biological liquids
First Claim
1. Disposable unit for single use for the analysis of biological liquids, in particular cell suspensions such as blood, urine, or sperm, comprising a diluent chamber, a sample dosage device, and a measuring chamber, wherein the sample dosage device has a dosage element into which a dosage capillary running between two openings is integrated, the dosage element is arranged inside a dosage element chamber formed in the disposable unit and is movable in such a manner that one opening of the dosage capillary is connected to a sample loading zone of the disposable unit when the dosage element is in a first position, and that, when it is in a second position, one of the openings of the dosage capillary is connected to the diluent chamber and the other opening of the dosage capillary is connected to the measuring chamber, so that the diluent chamber and the measuring chamber are in the second position connected to one another via the dosage capillary, and the measuring chamber has a defined volume and is provided with a ventilation valve which is permeable to gas but impermeable to the sample and diluent liquids, so that the measuring chamber is completely filled free of bubbles by the liquid flowing into it.
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Accused Products
Abstract
Disposable unit for single use for the analysis of biological liquids, in particular cell suspensions such as blood, urine, or sperm, with a diluent chamber (5), a sample dosage device (6), and a measuring chamber (7). The sample dosage device (6) has a dosage element (8) into which a dosage capillary (13) is integrated. The dosage element (8) is situated movably in a dosage element chamber (12) in such a manner that one opening (14) of the dosage capillary (13) is connected to a sample loading zone (17) of the disposable unit (2) when the dosage element (8) is in its first position, and when it is in its second position, the diluent chamber (5) and the measuring chamber (7) are connected to one another via the dosage capillary (13). The measuring chamber (7) has a ventilation valve (35) which is permeable to gas but impermeable to the sample liquid, so that the chamber is completely filled free of any bubbles with the liquid (36) flowing into it.
14 Citations
18 Claims
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1. Disposable unit for single use for the analysis of biological liquids, in particular cell suspensions such as blood, urine, or sperm, comprising a diluent chamber, a sample dosage device, and a measuring chamber, wherein
the sample dosage device has a dosage element into which a dosage capillary running between two openings is integrated, the dosage element is arranged inside a dosage element chamber formed in the disposable unit and is movable in such a manner that one opening of the dosage capillary is connected to a sample loading zone of the disposable unit when the dosage element is in a first position, and that, when it is in a second position, one of the openings of the dosage capillary is connected to the diluent chamber and the other opening of the dosage capillary is connected to the measuring chamber, so that the diluent chamber and the measuring chamber are in the second position connected to one another via the dosage capillary, and the measuring chamber has a defined volume and is provided with a ventilation valve which is permeable to gas but impermeable to the sample and diluent liquids, so that the measuring chamber is completely filled free of bubbles by the liquid flowing into it.
Specification