Hydrophilic diagnostic devices for use in the assaying of biological fluids
First Claim
1. In a microfluidic diagnostic device comprised of a base having at least one fluid channel within which an aqueous fluid sample to be assayed passes from an inlet port to a detection zone, the improvement comprising said at least one fluid channel being enclosed by at least one enclosure surface wherein at least one surface of the fluid channel comprises either a hydrophilic heat-sealable adhesive or a hydrophilic pressure sensitive adhesive, wherein the hydrophilic adhesive increases the surface energy of a fluid flow path through the channel and wherein the hydrophilic adhesive decreases the surface tension of aqueous fluid flowing through the channel.
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Abstract
Diagnostic in-vitro devices for use in the assaying of biological fluids are provided which include cover plates or backing strips which exhibit hydrophilic properties to assist in transport of the biological fluid or retention of same within the device. Exemplary diagnostic devices include lateral flow devices, microfluidic devices and microtiter plates. The devices may also be comprised of low fluorescent material in order to facilitate any diagnostic determination by use of fluorescent emissions. Hydrophilic properties may be imparted to the cover plates or backing strips by physical or chemical treatment thereof. The cover plates or backing strips may exhibit heat sealable or pressure sensitive properties.
25 Citations
15 Claims
- 1. In a microfluidic diagnostic device comprised of a base having at least one fluid channel within which an aqueous fluid sample to be assayed passes from an inlet port to a detection zone, the improvement comprising said at least one fluid channel being enclosed by at least one enclosure surface wherein at least one surface of the fluid channel comprises either a hydrophilic heat-sealable adhesive or a hydrophilic pressure sensitive adhesive, wherein the hydrophilic adhesive increases the surface energy of a fluid flow path through the channel and wherein the hydrophilic adhesive decreases the surface tension of aqueous fluid flowing through the channel.
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11. A detection device comprising:
a substrate providing a surface to carry an aqueous fluid from a first end of the substrate toward a detection zone along a fluid flow path, a portion of the substrate surface comprising a hydrophilic heat-sealable adhesive or a hydrophilic pressure sensitive adhesive wherein the hydrophilic adhesive increases the surface energy of the fluid flow path across the portion of the substrate surface comprising the hydrophilic adhesive and wherein the hydrophilic adhesive decreases the surface tension of the aqueous fluid flowing along the fluid flow path across the portion of the substrate surface comprising the hydrophilic adhesive. - View Dependent Claims (12, 13)
Specification