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Needle assembly for fluid sampler

  • US 6,120,464 A
  • Filed: 10/16/1998
  • Issued: 09/19/2000
  • Est. Priority Date: 10/16/1998
  • Status: Expired due to Term
First Claim
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1. A membrane and needle assembly for testing constituents of body fluid while avoiding contamination of testing from undesirable elements of the fluid, the assembly comprising:

  • a membrane for receiving a body fluid to be tested, the membrane having a generally planar test area, the membrane further including a transfer area spaced from the test area and in fluid communication with the test area;

    a needle having a penetration end for penetration into a skin layer of a patient, the needle having a discharge end, the discharge end defining an opening; and

    the needle disposed relative to the transfer area and fixed relative thereto and with the opening of the discharge end being substantially parallel to and in fixed close proximity to the transfer area wherein fluid flowing through the opening flows along a line of travel generally perpendicular to the transfer area.

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