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US 6,712,776 B2Granted
Enhanced interstitial fluid collection
AssigneeInteg, Inc.
InventorsScott T. Latterell, Paul D. Brinda, Michael E. Hilgers, Michael J. Shoup, Thomas B. Hoegh, Brian J. Erickson
Life of this patent
Estimating the term…
Abstract
A sampling apparatus for interstitial fluid includes a pressure ring surrounding a collection needle. The pressure ring and needle are movable relative to one another for the ring to first engage a patient's skin surface prior to insertion of the needle.
Claims13
A method of collecting a sample of body fluid from a skin layer the method comprising:
- providing a sampling tool comprising a needle and a skin stretching member having opposing surfaces at least partially surrounding said needle, wherein said needle and said skin stretching member are independently movable relative to one another along a path substantially parallel to an axis of said needle;
- placing said skin stretching member against the skin of a patient with said opposing surfaces at least partially surrounding and defining a fluid collection area;
- advancing said skin stretching member relative to said needle to stretch a skin layer in the fluid collection area;
- advancing said needle relative to said skin stretching member thereby inserting said needle into the fluid collection area of the stretched skin layer;
- and
- collecting said sample of body fluid including interstitial fluid.
3 more elements
A method of collecting a sample of body fluid from skin, the method comprising:
- providing a fluid collection device comprising a piston having a distal surface, a needle operatively connected to said piston and having a distal end extending a distance from said distal piston surface, and a pressure surface adjacent said needle, said piston and said pressure surface being independently movable relative to one another along a path substantially parallel to the axis of said needle;
- placing said pressure surface against the skin of a patient to define a fluid collection area
- advancing said pressure surface relative to said piston thereby stretching skin within the fluid collection area;
- advancing said piston relative to said pressure surface thereby inserting said needle into the fluid collection area of the skin;
- and
- collecting body fluid.
3 more elements
Dependencies are inferred from the claim text.