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Specimen sampling apparatus

  • US 4,311,484 A
  • Filed: 04/09/1980
  • Issued: 01/19/1982
  • Est. Priority Date: 04/09/1980
  • Status: Expired due to Term
First Claim
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1. Apparatus for obtaining a sample from a specimen of blood or the like in a closed container at a first pressure and for delivering said sample to an analyzer for analysis, said analyzer having intake means for intake of said specimen sample into the analyzer, said apparatus comprising:

  • means for penetrating said closed container, said means having a passage therein with an inlet for entry of a specimen sample into the passage and an outlet for exit of the sample from the passage, said penetrating means being movable from a retracted position to an extended position in which it penetrates said closed container with said inlet in position for entry of a specimen sample into said passage, and back to said retracted position;

    first conduit means connecting the outlet of said passage with said intake means of the analyzer for delivery of a specimen sample to the latter;

    means for reducing the pressure in said conduit means to a pressure less than said first pressure when said penetrating means is in said extended position thereby to aspirate a specimen sample from the container into said passage and said conduit means for delivery to the intake means of said analyzer; and

    means responsive to said aspiration to initiate transfer of said sample from said conduit means into the analyzer, the pressure in said passage and conduit means being at least equal to said first pressure following said aspiration thereby enabling said specimen sample readily to be drawn through said intake means into said analyzer for analysis.

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