Microneedle device for extraction and sensing of bodily fluids
First Claim
1. A device for collecting a sample of a biological fluid comprising:
- one or more hollow or porous microneedles, each having a base end and a tip;
a substrate to which the base end is attached or integrated; and
at least one collection chamber suitable for collecting said sample of said biological fluid, said collection chamber selectably in fluid communication with the base end, and wherein said collection chamber comprises a one-way valve and an upper portion which is formed of a deformable material.
3 Assignments
0 Petitions
Accused Products
Abstract
Microneedle devices are provided for controlled sampling of biological fluids in a minimally-invasive, painless, and convenient manner. The microneedle devices permit in vivo sensing or withdrawal of biological fluids from the body, particularly from or through the skin or other tissue barriers, with minimal or no damage, pain, or irritation to the tissue. The microneedle device includes one or more microneedles, preferably in a three-dimensional array, a substrate to which the microneedles are connected, and at least one collection chamber and/or sensor in communication with the microneedles. Preferred embodiments further include a means for inducing biological fluid to be drawn through the microneedles and into the collection chamber for analysis. In a preferred embodiment, this induction is accomplished by use of a pressure gradient, which can be created for example by selectively increasing the interior volume of the collection chamber, which includes an elastic or movable portion engaged to a rigid base. Preferred biological fluids for withdrawal and/or sensing include blood, lymph, interstitial fluid, and intracellular fluid. Examples of analytes in the biological fluid to be measured include glucose, cholesterol, bilirubin, creatine, metabolic enzymes, hemoglobin, heparin, clotting factors, uric acid, carcinoembryonic antigen or other tumor antigens, reproductive hormones, oxygen, pH, alcohol, tobacco metabolites, and illegal drugs.
622 Citations
48 Claims
-
1. A device for collecting a sample of a biological fluid comprising:
-
one or more hollow or porous microneedles, each having a base end and a tip; a substrate to which the base end is attached or integrated; and at least one collection chamber suitable for collecting said sample of said biological fluid, said collection chamber selectably in fluid communication with the base end, and wherein said collection chamber comprises a one-way valve and an upper portion which is formed of a deformable material. - View Dependent Claims (23, 25, 26, 27, 28, 29)
-
-
2. A device for collecting a sample of a biological fluid comprising:
-
one or more hollow or porous microneedles, each having a base end and a tip; a substrate to which the base end is attached or integrated; and at least one collection chamber suitable for collecting said sample of said biological fluid, wherein said collection chamber is selectably in fluid communication with the base end, and comprises a plurality of compartments. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A device for collecting a sample of a biological fluid comprising:
-
one or more hollow or porous microneedles, each having a base end and a tip; a substrate to which the base end is attached or integrated; at least one collection chamber suitable for collecting said sample of said biological fluid, said collection chamber selectably in fluid communication with the base end; and a fracturable or removable barrier for controlling flow through the microneedle, said barrier interposed between the collection chamber and base of the microneedle.
-
-
22. A device for collecting a sample of a biological fluid comprising:
-
one or more hollow or porous microneedles, each having a base end and a tip; a substrate to which the base end is attached or integrated; and at least one collection chamber suitable for collecting said sample of said biological fluid, said collection chamber selectably in fluid communication with the base end, wherein the one or more microneedles has a hollow bore containing a material to modulate the flow of biological fluid through the microneedles into the collection chamber.
-
-
24. A device for collecting a sample of a biological fluid comprising:
-
one or more hollow or porous microneedles, each having a base end and a tip, a length between 500 μ
m and 1 mm and a width between about 1 μ
m and 500 μ
m, and comprising a metal;a substrate to which the base end is attached or integrated; and at least one collection chamber suitable for collecting said sample of said biological fluid, said collection chamber selectably in fluid communication with the base end. - View Dependent Claims (30)
-
-
31. A device for sensing an analyte in a biological fluid comprising:
-
one or more microneedles, each having a base end and a tip, a length between about 500 μ
m and 1 mm and a width between about 1 μ
m and 500 μ
m, and comprising a metal;a substrate to which the base of the microneedle is attached or integrated; and at least one sensor which is selectably in fluid communication with the microneedle. - View Dependent Claims (43, 44, 45, 46, 47, 48)
-
-
32. A device for sensing an analyte in a biological fluid comprising:
-
one or more microneedles, each having a base end and a tip; a substrate to which the base of the microneedle is attached or integrated; and at least one sensor which is selectably in fluid communication with the microneedle, wherein the one or more microneedles has a hollow bore containing a material to modulate the flow of biological fluid through the microneedles into a collection chamber. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39)
-
-
40. A device for sensing an analyte in a biological fluid comprising:
-
one or more microneedles, each having a base end and a tip; and a substrate to which the base of the microneedle is attached or integrated, wherein at least one of the microneedles is or comprises a sensor, and wherein the one or more microneedles has a hollow bore containing a material to modulate the flow of biological fluid through the microneedles into a collection chamber. - View Dependent Claims (41, 42)
-
Specification