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Bodily fluid composition analyzer with disposable cassette

  • US 8,936,755 B2
  • Filed: 03/16/2012
  • Issued: 01/20/2015
  • Est. Priority Date: 03/02/2005
  • Status: Expired due to Fees
First Claim
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1. An apparatus for analyzing the composition of bodily fluid, the apparatus comprising:

  • a main instrument comprising;

    a housing and at least one protrusion extending from the housing;

    a fluid handling network that comprises fluid passageways and junctions, wherein the fluid handling network includes a patient end capable of maintaining fluid communication with a bodily fluid in a patient;

    a controller in operative engagement with the fluid handling network, the controller having an infusion mode in which the controller is configured to cause the fluid handling network to deliver infusion fluid to the patient through the patient end, and a sample draw mode in which the controller is configured to cause the fluid handling network to draw a sample of the bodily fluid from the patient through the patient end;

    a fluid analyzer positioned to analyze at least a portion of the sample; and

    a processor in communication with or incorporated into the fluid analyzer;

    said processor configured to execute stored program instructions;

    to obtain measurements of two or more properties of the portion of the sample;

    anda disposable fluid handling cassette removably engageable with the fluid analyzer, the cassette comprising;

    at least one fluid passageway capable of receiving bodily fluid from the patient via the fluid handling network;

    a sample measurement location positioned to allow analysis of the bodily fluid by the fluid analyzer and coinciding with an analysis region of the fluid analyzer, wherein the sample measurement location is configured to hold the sample in place during analysis by the fluid analyzer;

    an input fluid passageway capable of allowing the sample to flow to the sample measurement location from the fluid handling network;

    an output fluid passageway capable of allowing the sample to flow away from the sample measurement location; and

    at least one cassette engagement interface capable of engaging the at least one protrusion of the main instrument and to place the controller in operative engagement with the disposable fluid handling cassette while the disposable fluid handling cassette is installed in the fluid analyzer.

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