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Test method and test device for analysing a body fluid

  • US 9,052,293 B2
  • Filed: 08/15/2011
  • Issued: 06/09/2015
  • Est. Priority Date: 02/18/2009
  • Status: Active Grant
First Claim
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1. A method of detecting body fluid sample application error on a test tape having a plurality of test fields, the method comprising the steps of:

  • applying the body fluid sample to a test field of the test tape to initiate a test, wherein the test tape is in a test device having a measuring unit comprising at least one radiation source to generate at least one wavelength of light and a photodiode for reflection-photometric signal detection of the at least one wavelength of light;

    photometrically scanning the test field at a first wavelength of light and a second wavelength of light with the measuring unit and detecting relative remission measurement signals of the first wavelength of light and the second wavelength of light over a duration of a measurement interval, wherein the first wavelength of light is a visible range wavelength and the second wavelength of light is an infrared range wavelength;

    calculating a control value based upon a measurement signal difference between relative remissions of the first wavelength of light and the second wavelength of light, wherein the measurement signal difference between the first wavelength of light and the second wavelength of light results from wetting the test field with the body fluid sample; and

    detecting body fluid sample application error and discarding the test if the control value is below a preset threshold at a beginning of the measurement interval.

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