Microdialysis needle assembly
First Claim
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1. A device for the measurement of analytes in a body fluid comprising:
- a. a support with an upper surface, b. a layer adhered to the upper surface, the layer including a hardenable material wherein at least one microfluidic channel has been etched after the layer is at least partially hardened, and c. a semipermeable membrane at least partially covering the layer.
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Abstract
A device for the measurement of analytes in a body fluid including a support with an upper surface, a layer adhered to the upper surface, the layer being of a hardenable material wherein at least one microfluidic channel has been etched after the layer is at least partially hardened, and a semipermeable membrane at least partially covering the layer.
25 Citations
41 Claims
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1. A device for the measurement of analytes in a body fluid comprising:
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a. a support with an upper surface, b. a layer adhered to the upper surface, the layer including a hardenable material wherein at least one microfluidic channel has been etched after the layer is at least partially hardened, and c. a semipermeable membrane at least partially covering the layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 40)
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17. A method of making a microdialysis sensor comprising:
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a. providing a support with an upper surface, b. creating a layer on the upper surface by adding a hardenable liquid to the upper surface and partially hardening the hardenable liquid such that the hardenable liquid adheres to the upper surface and forms a new upper surface, c. creating a channel in the partially hardened layer, d. adhering a semipermeable membrane to the new upper surface and hardening the layer to form an assembly including the support, the layer and the membrane, and e. conformally coating the assembly with an insulating layer. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of making a microdialysis sensor comprising:
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a. providing a metal support with an upper surface, b. treating the upper surface using oxygen plasma, c. creating a layer on the prepared upper surface by adding a hardenable liquid to the prepared upper surface and partially hardening the hardenable liquid such that the hardenable liquid adheres to the prepared upper surface and forms a new upper surface, d. creating a channel in the partially hardened layer, e. adhering a semipermeable membrane to the new upper surface by contacting the semipermeable membrane to the partially hardened layer and heating the assembly to further harden the layer to form an assembly including the support, the layer and the membrane, and f. conformally coating the assembly with an insulating layer. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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35. A device comprising a plurality of body analyte monitoring system assemblies, the assemblies comprising:
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a. a support with an upper surface, wherein the support with an upper surface is shared by the plurality of the assemblies;
b. a layer adhered to the upper surface, the layer including a hardenable material wherein a plurality of microfluidic channels are etched after the layer is at least partially hardened, the plurality of microfluidic channels forming a plurality of respective microfluidic networks of the assemblies, wherein the layer is shared by the plurality of assemblies;
c. a semipermeable membrane at least partially covering the layer, wherein the membrane is shared by the plurality of assemblies; and
d. manifolds associated with respective assemblies, the manifolds covering at least a portion of the semipermeable membranes of the respective assemblies, wherein the manifolds comprise a plurality fluid access ports adapted to provide fluid access to the microfluidic network of the respective assemblies to permit a plurality of respective fluids to at least one of enter and exit the respective microfluidic network through the respective manifold, and wherein the manifolds further comprises electrical leads adapted to provide electrical access to respective chambers of the respective microfluidic network. - View Dependent Claims (36, 37, 41)
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38. A method of making a plurality of microdialysis assemblies, comprising the actions of:
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a. providing a support with an upper surface;
b. creating a layer on the upper surface by adding a hardenable liquid to the upper surface and partially hardening the hardenable liquid such that the hardenable liquid adheres to the upper surface and forms a new upper surface;
c. creating a plurality of channels in the partially hardened layer to form a plurality of individual microfluidic networks;
d. adhering a semipermeable membrane to the new upper surface and hardening the layer to form an assembly including the support, the layer and the membrane;
e. creating a manifold layer, the manifold layer comprising a plurality fluid access ports adapted to provide fluid access to the individual microfluidic networks to permit a plurality of respective fluids to at least one of enter and exit the respective microfluidic networks through the manifold layer, and wherein the manifold layer further comprises electrical leads adapted to provide electrical access to chambers of the microfluidic networks; and
f. separating the device made by actions a-e into a plurality of assemblies, the plurality of assemblies including a plurality of assemblies each including a microfluidic network, and a plurality fluid access ports adapted to provide fluid access to the microfluidic network to permit a plurality of respective fluids to at least one of enter and exit the microfluidic network through the manifold. - View Dependent Claims (39)
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Specification