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Devices and methods for sampling biological fluids

  • US 8,329,114 B2
  • Filed: 03/18/2009
  • Issued: 12/11/2012
  • Est. Priority Date: 03/18/2008
  • Status: Active Grant
First Claim
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1. A drive assembly with collection chambers for sampling biological fluids comprising:

  • a) a primary line having an inner cavity surrounded by a wall, said primary line comprising an an inlet end capable of receiving a biological fluid;

    b) a fluid reservoir;

    c) a waste container;

    d) a plurality of sample collection chambers;

    e) a peristaltic pump comprising a central rotor and a plurality of rotor housings, each capable of selective engagement with said central rotor, wherein each rotor housing comprises a sample collection line positioned along an inner perimeter and fluidly connected at one end to one of said plurality of collection chambers and at an opposing end to one of a plurality of needles, further wherein said engagement compresses said sample collection line against said central rotor and drives said needle into said inner cavity of said primary line; and

    f) a cam assembly comprising a rotatable earn, positionable along said plurality of rotor housings, wherein rotation of said cam in a first position selectively engages one of said rotor housings with said central rotor and rotation in a second position releases said rotor housing from engagement with said central rotor.

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