Biosensor and method of production thereof
First Claim
1. A biosensor for determining substances in body liquids, in particular in blood, which biosensor comprises:
- an upper part (2) and a lower part (3), lying on top of each other, and an intermediate layer (5), which is located between the upper part (2) and the lower part (3) and in which a slit (6) is formed, wherein said upper part (2), said lower part (3) and said slit (6) form a capillary channel (20), which extends from a supply inlet (16) formed at the edge of the biosensor to an air vent (7) formed in the upper or the lower part (2, 3), and electrodes are provided which, together with an enzyme-containing substance, allow an electrochemical measurement of the substances to be determined, characterized in that both the upper part (2) and the lower part (3) each carry at least one electrode (8, 9;
10, 11) in the region of the capillary channel (20), said electrodes being arranged in pairs lying opposite each other in the capillary channel (20), and an enzyme-containing substance (12, 13) is applied on at least one electrode (8, 9) of at least one pair of electrodes.
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Accused Products
Abstract
The invention relates to a biosensor for the determination of substances in bodily fluids, in particular, in blood, comprising a two-piece support plate, whereby the one piece of the support plate represents an upper piece and the other piece represents a lower piece, with an intermediate layer lying between the upper and lower piece in which an aperture is formed. The upper piece, lower piece and aperture form a capillary channel, running from a cover opening formed at the edge of the biosensor to an air hole formed in the upper piece or lower piece. Electrodes are provided, which together with an enzyme-containing substance permit an electrochemical measurement of substances found in body fluids. The upper piece and lower piece each support at least one electrode in the region of the capillary channel, which oppose each other in pairs and are arranged such that both electrode pairs form measuring regions lying within the capillary channel, whereby at least one of the electrodes of each electrode pair is treated with an enzyme-containing substance.
50 Citations
15 Claims
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1. A biosensor for determining substances in body liquids, in particular in blood, which biosensor comprises:
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an upper part (2) and a lower part (3), lying on top of each other, and an intermediate layer (5), which is located between the upper part (2) and the lower part (3) and in which a slit (6) is formed, wherein said upper part (2), said lower part (3) and said slit (6) form a capillary channel (20), which extends from a supply inlet (16) formed at the edge of the biosensor to an air vent (7) formed in the upper or the lower part (2, 3), and electrodes are provided which, together with an enzyme-containing substance, allow an electrochemical measurement of the substances to be determined, characterized in that both the upper part (2) and the lower part (3) each carry at least one electrode (8, 9;
10, 11) in the region of the capillary channel (20), said electrodes being arranged in pairs lying opposite each other in the capillary channel (20), and an enzyme-containing substance (12, 13) is applied on at least one electrode (8, 9) of at least one pair of electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15)
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- 13. The method as claimed in any one of the preceding method claims, characterized in that, preferably prior to step c), a preferably lens-shaped hole is punched in the base plate in the region of the folding line, said hole being formed such that, during folding, the edge of the hole lying in the lower part comes to rest in the region of the edge of the hole lying in the upper part and that the slit is formed so as to extend to said hole.
Specification