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Molded cartridge with 3-D hydrodynamic focusing

  • US 8,273,294 B2
  • Filed: 06/30/2006
  • Issued: 09/25/2012
  • Est. Priority Date: 07/01/2005
  • Status: Active Grant
First Claim
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1. A molded fluidic circuit card comprising:

  • a first channel having a longitudinal axis and a first fluid flow;

    a second channel situated in the first channel, the second channel introducing a sample core flow within the first fluid flow;

    a third channel coupled to the first channel and having a longitudinal axis at an angle relative to the longitudinal axis of the first channel;

    a fourth channel coupled to the first channel and having a longitudinal axis at an angle relative to the longitudinal axis of the first channel, the fourth channel positioned at a location relative to the third channel to achieve three-dimensional focusing of the core sample;

    a first fluid reservoir coupled to the third channel;

    a second fluid reservoir coupled to the fourth channel;

    a flow rate control box in communication with the third and fourth channels, the flow rate control box controlling the flow of a second fluid from the first fluid reservoir through the third channel and into and through the first channel and the flow rate control box controlling the flow of a second fluid from the second fluid reservoir through the fourth channel and into and through the first channel;

    wherein the flow rate control box controls a velocity of fluid flow in the third channel relative to a velocity of fluid flow in the fourth channel to adjust the sample core flow in three dimensions, thereby achieving three-dimensional focusing of the sample core flow;

    wherein the first, second, third, and fourth channels and first and second fluid reservoirs are molded components in the fluidic circuit card.

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