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US 5,582,184 AGranted
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
Estimating the term…
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.
Claims20
An apparatus for obtaining a sample of body fluid, said apparatus comprising:
- a penetration member with a fluid pathway for fluid to flow at least partially along a length of said member, said member sized to penetrate at least into the dermal layer of skin, said penetration member having a fluid entrance to admit into said fluid pathway a body fluid residing in the dermal layer;
- and
- means for controlling a depth of the penetration of said penetration member so that said fluid entrance penetrates into the dermal layer of skin but not through the dermal layer for a substantially blood free sample of fluid from said layer to flow into said pathway through said entrance.
An apparatus for obtaining a sample of body fluid, said apparatus comprising:
- a penetration member having a fluid pathway for fluid to flow at least partially along the length of said member, said member sized to penetrate at least into the dermal layer of a patient's skin for a sample of said fluid to flow along said pathway;
- and
- limit means to limit penetration of said penetration member into and not through said dermal layer.
A method for collecting a sample of body fluid, said method comprising:
- selecting a penetrating member having a length sized to partially extend into the dermal layer of skin and having a fluid pathway for fluid to flow at least partially along a length of said member and sizing said member to collect said fluid upon insertion of said member into said skin and without substantial pain upon insertion;
- inserting said penetrating member into said skin a depth selected for said penetration member to penetrate into and not through said dermal layer;
- and
- drawing said fluid along said fluid pathway.
1 more element
Dependencies are inferred from the claim text.