Method and device for analyzing a body fluid
AssigneeRoche Diagnostics Operations, Inc.
InventorsHerbert Harttig, Hans-Peter Haar, Gerhard Werner
Life of this patent
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Abstract
Methods and devices for analyzing body fluids, in particular for determining blood glucose. Body fluid is applied to a test element for single-use in a test device and the test element is optically coupled to a photometric measuring unit by means of an optical transmission system, wherein a time course of measuring values is recorded after the body fluid has been applied in order to detect a component of the body fluid on the test element. The transmission behavior of the optical transmission system may be controlled by recording measuring values at two different measurement wavelengths.
Claims15
A method for analyzing a body fluid, in particular for blood glucose determination, in which body fluid is applied to a test element for single-use in a test device and the test element is optically coupled to a photometric measuring unit by means of an optical transmission system, the method comprising:
- recording a time course of measurements after the body fluid has been applied in order to detect a component of the body fluid on the test element,
- monitoring the transmission behavior of the optical transmission system by recording measurements at two different measurement wavelengths, and
- determining a difference in the transmission behavior of the optical transmission system before and after applying the body fluid from a wavelength-dependent comparison of the measurements.
A device for analyzing a body fluid, in particular for blood glucose determination, comprising a portable test device having a photometric measuring unit and a test element coupled to the measuring unit by means of an optical transmission system, where body fluid is applied to the test element for a single-use test, the measuring unit is configured such that the transmission behavior of the optical transmission system is monitored by recording measurements at two different measurement wavelengths, and a difference in the transmission behavior of the optical transmission system is determined before and after applying the body fluid from a wavelength-dependent comparison of the measurements.
Dependencies are inferred from the claim text.