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Fluidic device for medical diagnostics

  • US 20030156984A1
  • Filed: 12/26/2002
  • Published: 08/21/2003
  • Est. Priority Date: 07/20/1998
  • Status: Active Grant
First Claim
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1. A fluidic diagnostic device for measuring an analyte concentration or property of a biological fluid, comprising a first layer and second layer, at least one of which has a resilient region over at least a part of its area, separated by an intermediate layer, in which cutouts in the intermediate layer form, with the first and second layers, a) a sample port for introducing a sample of the biological fluid into the device;

  • b) a first measurement area, in which a physical parameter of the sample is measured and related to the analyte concentration or property of the fluid;

    c) a first channel, having a first end and a second end, to provide a fluidic path from the sample port at the first end through the first measurement area;

    d) a first bladder, at the second end of the first channel, comprising at least a part of the resilient region in at least the first or second layer and having a volume that is at least about equal to the combined volume of the first measurement area and first channel; and

    e) a first stop junction in the first channel between the first measurement area and first bladder that comprises a co-aligned through hole in the first or second layer, the through hole overlaid with a third layer.

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