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Method for verifying fitness of an analysis element

  • US 7,736,904 B2
  • Filed: 01/25/2008
  • Issued: 06/15/2010
  • Est. Priority Date: 09/01/2000
  • Status: Expired due to Fees
First Claim
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1. A method for verifying the usability of a test element provided for use with a corresponding evaluation unit for analysis of a liquid sample, the method comprising the steps of:

  • a) determining a first standard value (W1) for at least one control parameter measured from a standard reference presented to the evaluation unit, the standard reference providing a standardized reference value (W1) for the at least one control parameter;

    b) providing a first test element comprising a first test field to the evaluation device and determining a blank-field reference value (L1) for the at least one control parameter from the first test field);

    c) calculating a first ratio (Q1=L1/W1 or W1/L1) from the reference value (L1) and the first standard value (W1);

    d) providing a second test element comprising a second test field to the evaluation device and determining a blank-field control value (L2) for the at least one control parameter from the second test field;

    e) calculating a second ratio (Q2=L2/W1 or W1/L2) from the control value (L2) and the first standard value (W1);

    f) determining a deviation (Δ

    ) between the second ratio (Q2=L2/W1 or W1/L2) and the first ratio (Q1=L1/W1 or W1/L1); and

    g) rejecting the second test element if the deviation (Δ

    ) is not within a pre-determined tolerance range for the deviation (Δ

    ).

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