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US 7,137,957 B2Granted
Interstitial fluid collection and constituent measurement
AssigneeInteg, Inc.
InventorsBrian J. Erickson, Michael E. Hilgers, Tracy A. Hendrickson, J. Edward Shapland, Frank A. Solomon, Mark B. Knudson
Life of this patent
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Abstract
An apparatus and method is disclosed for obtaining and measuring constituents in a sample of body fluid. The apparatus includes a member which is sized to penetrate into at least the dermal layer of skin to collect a sample of body fluid located within the dermal layer.
Claims29
A method for collecting a sample of body fluid, comprising:
- forming an artificial opening within a patient's skin but not through a dermal layer of said skin;
- accessing a constituent-containing fluid in said dermal layer;
- exerting a capillary action on the accessed fluid;
- and
- drawing a sample of said accessed fluid through said opening.
2 more elements
A method for collecting a sample of body fluid, comprising:
- inserting a penetration member into but not through a dermal layer of skin to access body fluid therein, said penetration member having an open distal end;
- and
- exerting a capillary action on the body fluid present at said open distal end of said penetration wherein said body fluid is drawn into said penetration member.
An apparatus for collecting a sample of body fluid, comprising:
- a penetration member sized to penetrate into but not through the dermal layer of skin, said penetration member having an open distal end;
- and
- means associated with said penetration member for exerting a capillary action on fluid present at said open distal end.
An apparatus for collecting a sample of body fluid, comprising:
- a hollow needle comprising an insertion tip sized to penetrate into but not through the dermal layer of skin;
- and
- a tube retained within said hollow needle, said tube comprising an open distal end and an inner diameter sufficient to exert a capillary action on fluid present at said open distal end so as to draw the fluid into said tube.
Dependencies are inferred from the claim text.