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Microfluidic device for full blood count

  • US 10,191,054 B2
  • Filed: 01/26/2010
  • Issued: 01/29/2019
  • Est. Priority Date: 01/27/2009
  • Status: Active Grant
First Claim
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1. A microfluidic device for performing a full blood count from a whole blood sample from a finger-prick, the full blood count including measurements of white blood cell differential count, platelet count, red blood cell counts and hemoglobin, the microfluidic device comprising:

  • a first inlet for providing the whole blood sample;

    a second inlet for providing a first lysis agent to count white blood cells, the second inlet being located downstream from the first inlet and being connected to a first junction;

    a third inlet for providing a quench solution, the third inlet being located downstream from the second inlet and being connected to a second junction;

    a first pair of channels connected to and split from the first inlet and meeting at the first junction,a second pair of channels connected to and split from the third inlet and meeting at the second junction;

    a first snake mixing stage configured to mix the first lysis agent and the whole blood sample, the first snake mixing stage being located between the second and third inlets;

    a second snake mixing stage configured to mix the quench solution and the mixture of the first lysis agent and the whole blood sample mixed at the first snake mixing stage, the second snake mixing stage being serially connected to the first snake mixing stage and located downstream from the first snake mixing stage and the third inlet, wherein an input of the first snake mixing stage is connected to the first junction, to the second inlet and to the first pair of channels, and wherein an output of the first snake mixing stage is connected to the second junction, to an input of the second snake mixing stage, and to the second pair of channels for providing the quench solution to the input of the second snake mixing stage from the second pair of channels split from the third inlet and meeting at the second junction; and

    a channel for providing a second lysis agent to measure the hemoglobin, the channel including a fourth inlet located downstream from the first inlet for providing the second lysis agent into the channel to measure the hemoglobin.

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