FIELD: chemical industry.
SUBSTANCE: invention relates to an optical test strip and a method for its manufacture, as well as to a kit for measuring the concentration of an analyte in a sample of physiological fluid and a mobile device used in medical diagnostics for the purpose of quantitatively or qualitatively determining and/or measuring the concentration of one or more analytes in one or more bodily fluids. The claimed optical test strip (118) for measuring the concentration of an analyte in a sample of physiological fluid contains the following: the bottom layer (116) having the first end (130), and the bottom layer (116) is at least one layer of the test strip (118) located on its underside; a top layer (110) having a first end (132) substantially aligned with a first end (130) of the bottom layer (116), the top layer (110) comprising at least one top film (120) that is transparent; at least one spacer layer (114) located between the bottom layer (116) and the top layer (110), the spacer layer (114) has a length shorter than the bottom layer (116) and shorter than the top layer (110), so that the top layer (110) and the bottom layer (116) protrude beyond the spacer layer (114), wherein the first end (130) of the bottom layer (116), the first end (132) of the top layer (110) and the spacer layer (114) form a sample receiving area (140) that at least partially has capillary properties for receiving a sample of physiological fluid; and at least one test field (112) attached to the top layer (110), wherein the test field (112) contains a test chemical intended to carry out an optically detectable analytical reaction with an analyte, wherein the test field (112) contains at least one first region (126) and at least one second region (128) having essentially the same spectral and/or spectroscopic characteristics and/or reflective and/or absorbing properties, the first region (126) facing the reception area (140) sample and is configured to at least partially wet the sample of physiological fluid during its application. Moreover, the test strip (118) has a layered layout, an upper side and a lower side, with the upper side being the side from which the test field (112) is available for obtaining its image. The top layer (110) is the layer of the test strip (118) limiting its layered arrangement from the top side of the test strip (118). The second area (128) is covered with a spacer layer (114) so that the second area (128) is essentially inaccessible to the physiological fluid sample, and the first area (126) and the second area (128) are located sequentially along the elongated extent of the test strip (118).
EFFECT: reducing the influence of external light and other factors, such as light reflection, geometric factors, aging, etc., when determining or measuring the analyte concentration in a physiological fluid sample without the need for additional hardware.
13 cl, 5 dwg
