Apparatus for pumping and directing fluids for hematology testing
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Accused Products
Abstract
An apparatus is provided for hematology testing, which has a sensing unit defining a counting orifice for the flow of a blood sample through the counting orifice to analyze the blood sample, and a pump unit having three syringes. A first syringe is coupled in fluid communication with the sensing unit on the inlet side of the counting orifice for injecting a stream of blood sample through the counting orifice. A second syringe is coupled in fluid communication with the sensing chamber on the inlet side of the counting orifice for simultaneously injecting a sheath of fluid surrounding the sample stream on the inlet side of the counting orifice. And a third syringe is coupled to the sensing chamber on the outlet side of the counting orifice for aspirating a sheath of fluid from the sensing chamber surrounding the sample stream on the outlet side of the counting orifice.
48 Citations
33 Claims
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1-26. -26. (canceled)
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27. An apparatus for analyzing blood, the apparatus comprising:
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a pump;
a reagent chamber for containing a lysing agent, the reagent chamber is in fluid communication with the pump;
a control unit is adapted to adjust a ratio of the lysing agent to blood, the control unit is in electrical communication with the pump;
a mixing zone for mixing the ratio of the lysing agent and blood to create a reagent mixture, the mixing zone is in fluid communication with the reagent chamber; and
a sensing zone for receiving the reagent mixture and analyzing a particle distribution of the reagent mixture, the sensing zone is in fluid communication with the mixing zone. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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Specification