Method for controlling a photometric measuring unit of a measuring device for obtaining and examining a bodily fluid sample and measuring system
First Claim
1. A method for controlling a photometric measuring unit of a measuring device for examining a human or animal bodily fluid sample obtained by way of lancing, wherein:
- a test field partially wetted by a bodily fluid sample is illuminated and light from a measuring area that covers a portion of the test field is fed to a detector of the measuring unit;
the measuring area is displaced relative to the test field toward a partial surface wetted by the bodily fluid sample and past the partial surface;
during the displacement, the intensity of a detector signal is measured and an extreme value in the course of the detector signal is determined;
the measuring area is returned to a position in which the extreme value of the detector signal was previously measured; and
the position of the measuring area in which the extreme value of the detector signal was measured is used for a photometric determination of analyte concentration.
3 Assignments
0 Petitions
Accused Products
Abstract
There is disclosed a method for controlling a photometric measuring unit of a measuring device for a bodily fluid sample, wherein a test field partially wetted by a bodily fluid sample is illuminated and light from a measuring area that covers a portion of the test field of the measuring unit is fed to a detector of the measuring unit, and the measuring area is displaced relative to the test field toward a partial surface wetted by the fluid sample and past the partial surface. The intensity of a detector signal is detected during the displacement, an extreme value in the course of the detector signal is determined, the measuring area is brought back to the position in which an extreme detector signal was previously measured, and the position of the measuring area in which the detector signal is extreme is used for a photometric determination of concentration.
14 Citations
15 Claims
-
1. A method for controlling a photometric measuring unit of a measuring device for examining a human or animal bodily fluid sample obtained by way of lancing, wherein:
-
a test field partially wetted by a bodily fluid sample is illuminated and light from a measuring area that covers a portion of the test field is fed to a detector of the measuring unit; the measuring area is displaced relative to the test field toward a partial surface wetted by the bodily fluid sample and past the partial surface; during the displacement, the intensity of a detector signal is measured and an extreme value in the course of the detector signal is determined; the measuring area is returned to a position in which the extreme value of the detector signal was previously measured; and the position of the measuring area in which the extreme value of the detector signal was measured is used for a photometric determination of analyte concentration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A measuring system for the photometric determination of an analyte concentration in a bodily fluid sample, comprising:
-
test fields having detection reagents which, upon contact with bodily fluid, induce a detection reaction which can be evaluated photometrically; and a measuring device for measuring, by way of a test field, the analyte concentration in a bodily fluid sample obtained from a lanced site, wherein the measuring device includes a measuring unit for performing a photometric measurement of a color change of a test field, wherein the measuring unit has a light source and a detector, and the measuring unit defines a beam path for light from the light source to the detector, wherein the beam path limits the sensitivity of the detector to a partial region of a test field fed to the measuring unit, the test field partial region from which the beam path directs light to the detector is adjustable using at least one actuator, the actuator is controlled by a control unit which is operable to evaluate a detector signal and use an actuator setting at which the detector signal is extreme for a photometric determination of the analyte concentration. - View Dependent Claims (13, 14, 15)
-
Specification