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System for the analysis of biological liquids

  • US 20030012694A1
  • Filed: 03/04/2002
  • Published: 01/16/2003
  • Est. Priority Date: 03/15/2001
  • Status: Abandoned Application
First Claim
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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.

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