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Integrated nucleic acid diagnostic device

  • US 5,856,174 A
  • Filed: 01/19/1996
  • Issued: 01/05/1999
  • Est. Priority Date: 06/29/1995
  • Status: Expired due to Term
First Claim
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1. A miniature analytical device, comprising:

  • a body having at least a first reaction chamber fluidly connected to a second reaction chamber by a fluid passage;

    a sample inlet, fluidly connected to said first reaction chamber, for introducing a fluid sample into said device;

    a differential pressure delivery system for maintaining said first reaction chamber at a first pressure and said second reaction chamber at a second pressure, said first pressure being greater than ambient pressure and said second pressure being greater than said first pressure, whereby when said second reaction chamber is brought to ambient pressure, said first pressure forces a liquid sample in said first reaction chamber into said second reaction chamber;

    a pressure source;

    at least first and second passages fluidly connecting said pressure source to said first and second reaction chambers, respectively;

    a first fluidic resistance disposed in said first passage between said pressure source and said first reaction chamber, said first fluidic resistance transforming a pressure from said pressure source to said first pressure;

    a second fluidic resistance disposed in said second passage between said pressure source and said second reaction chamber, said second fluidic resistance transforming said pressure from said pressure source to said second pressure; and

    first and second openable closures in said first and second reaction chambers, respectively, whereby opening of said first or second closures allows said first or second reaction chambers to achieve ambient pressure.

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