Collection assemblies, laminates, and autosensor assemblies for use in transdermal sampling systems
First Claim
1. A collection assembly, for use in a iontophoretic sampling device useful to monitor glucose present in a biological system, said collection assembly comprisinga) a collection insert layer comprised of first and second hydrogels, each hydrogel comprising, (i) an ionically conductive material, (ii) first and second surfaces, and (iii) glucose oxidase;
- b) a mask layer comprised of a material that is substantially impermeable to glucose, wherein the mask layer (i) has inner and outer faces and said outer face provides contact with said biological system and the inner face is positioned in facing relation with the first surface of each hydrogel, (ii) defines first and second openings that are aligned, respectively, with the first and second hydrogels of the collection insert layer, (iii) each opening exposes at least a portion of the first surface of the aligned hydrogel, and (iv) has a border which extends beyond the first surface of each hydrogel to provide an overhang; and
c) a retaining layer having (i) inner and outer faces wherein the inner face is positioned in facing relation with the second surface of each hydrogel, (ii) defines first and second openings that are aligned, respectively, with the first and second hydrogels of the collection insert layer, (iii) each opening exposes at least a portion of the second surface of the aligned hydrogel, and (iv) has a border which extends beyond the first surface of each hydrogel of the collection insert layer to provide an overhang.
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Accused Products
Abstract
The invention relates generally to consumable components of a device used for continually or continuously measuring the concentration of target chemical analytes present in a biological system. More particularly, the invention relates to collection assemblies, laminate structures, and autosensor assemblies, which are used in connection with a transdermal sampling device. In one aspect, the invention includes autosensor assemblies which include laminate structures, electrode assemblies, and support trays. One important application of the invention involves an autosensor assembly for use in a blood glucose monitoring device.
304 Citations
50 Claims
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1. A collection assembly, for use in a iontophoretic sampling device useful to monitor glucose present in a biological system, said collection assembly comprising
a) a collection insert layer comprised of first and second hydrogels, each hydrogel comprising, (i) an ionically conductive material, (ii) first and second surfaces, and (iii) glucose oxidase; -
b) a mask layer comprised of a material that is substantially impermeable to glucose, wherein the mask layer (i) has inner and outer faces and said outer face provides contact with said biological system and the inner face is positioned in facing relation with the first surface of each hydrogel, (ii) defines first and second openings that are aligned, respectively, with the first and second hydrogels of the collection insert layer, (iii) each opening exposes at least a portion of the first surface of the aligned hydrogel, and (iv) has a border which extends beyond the first surface of each hydrogel to provide an overhang; and
c) a retaining layer having (i) inner and outer faces wherein the inner face is positioned in facing relation with the second surface of each hydrogel, (ii) defines first and second openings that are aligned, respectively, with the first and second hydrogels of the collection insert layer, (iii) each opening exposes at least a portion of the second surface of the aligned hydrogel, and (iv) has a border which extends beyond the first surface of each hydrogel of the collection insert layer to provide an overhang. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An autosensor assembly for use in a iontophoretic sampling device useful to monitor glucose present in a biological system, said autosensor assembly comprising,
(I) a collection assembly said collection assembly comprising, a) a collection insert layer comprised of first and second hydrogels, each hydrogel comprising (i) an ionically conductive material, and (ii) glucose oxidase; -
b) a mask layer comprised of a substantially planar material that is substantially impermeable to glucose, wherein the mask layer (i) has inner and outer faces and said outer face provides contact with said biological system and the inner face is positioned in facing relation with the first surface of each hydrogel, (ii) defines first and second openings that are aligned, respectively, with the first and second hydrogels of the collection insert layer, (iii) each opening exposes at least a portion of the first surface of the aligned hydrogel, and (iv) has a border which extends beyond the first surface of each hydrogel to provide an overhang;
(c) a retaining layer having (i) inner and outer faces wherein the inner face is positioned in facing relation with the second surface of each hydrogel, (ii) defines first and second openings that are aligned, respectively, with the first and second hydrogels of the collection insert layer, (iii) each opening exposes at least a portion of the second surface of the aligned hydrogel, and (iv) has a border which extends beyond the first surface of each hydrogel to provide an overhang; and
(d) where the first and second openings in the mask layer are positioned in the collection assembly such that they are aligned with the first and second openings in the retaining layer and thereby define a plurality of flow paths through said collection assembly;
(II) an electrode assembly having an inner and outer face, the inner face comprising first and second bimodal electrodes, wherein the first and second bimodal electrodes are aligned, respectively, with the first and second openings in the retaining layer of the collection assembly; and
(III) a support tray that contacts the outer face of the electrode assembly. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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Specification