US5746217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interstitial fluid collection and constituent measurement
Assignee: Diabetes Diagnostics Inc
•
Filing: 1995-11-08
•
Granted: 1998-05-05
•
Expires: 2015-11-08
Abstract
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.
Inventors
- 👤 Brian J. Erickson
- 👤 Michael E. Hilgers
- 👤 Tracy A. Hendrickson
- 👤 J. Edward Shapland
- 👤 Frank A. Solomon
- 👤 Mark B. Knudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:29
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/1455; A61B10/00; A61B10/0045; A61B5/14507; A61B5/1451; A61B5/14514; A61B5/14532; A61B2010/008
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
68 words
A method for testing a sample of body fluid, said method comprising: urging a sampler against a patient's skin, said sampler including a penetration member sized to penetrate the patient's skin into but not substantially through a dermal layer upon placement of said sampler against said skin; drawing a sample of said fluid along said penetration member and out of said skin; testing said sample for desired constituents.
Claim 2
Independent Claim
68 words
A method for testing a sample of body fluid, said method comprising: urging a sampler against a patient's skin, said sampler including a penetration member sized to penetrate the patient's skin into but not substantially through a dermal layer upon placement of said sampler against said skin; drawing a sample of said fluid along said penetration member and out of said skin; testing said sample for desired constituents.
Claim 3
Dependent Claim
24 words
A method according to claim 1 wherein said sample is tested by passing light through said sample and measuring an absorption of predetermined wavelengths.
Claim 4
Dependent Claim
12 words
A method according to claim 1 wherein said sample is tested electro-chemically.
Claim 5
Dependent Claim
12 words
A method according to claim 1 wherein said sample is tested colormetrically.
Claim 6
Dependent Claim
15 words
A method according to claim 1 wherein said sample is tested by attenuated total reflectance.
Claim 7
Dependent Claim
22 words
A method according to claim 1 wherein said penetration member is a needle selected to have a size smaller than 28 gauge.
Claim 8
Dependent Claim
26 words
A method according to claim 1 comprising compressing against said skin in a region surrounding said penetration member during placement of said sampler against said skin.
Claim 9
Dependent Claim
14 words
A method according to claim 1 comprising drying said fluid prior to said testing.
Claim 10
Dependent Claim
16 words
A method according to claim 1 comprising retaining said fluid on a membrane for said testing.
Claim 11
Independent Claim
87 words
A method for determining a level of a constituent in a body fluid, said method comprising: inserting a conduit into the dermal layer of skin but not through the dermal layer; passing a sample of said body fluid located within the dermal layer into said conduit; evaporating the liquid from said conduit so that only the constituent remains on the walls of the conduit; and directing a light source through the constituent retained in said conduit to determine the level of a constituent in the body fluid.
Claim 12
Independent Claim
87 words
A method for determining a level of a constituent in a body fluid, said method comprising: inserting a conduit into the dermal layer of skin but not through the dermal layer; passing a sample of said body fluid located within the dermal layer into said conduit; evaporating the liquid from said conduit so that only the constituent remains on the walls of the conduit; and directing a light source through the constituent retained in said conduit to determine the level of a constituent in the body fluid.
Claim 13
Dependent Claim
51 words
A method according to claim 10 wherein said light source includes light having a wavelength absorbable by the constituent and said step of directing the light source through the constituent includes measuring the amount of light absorbed by the constituent to determine the concentration of the constituent in the body fluid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-04 | 2001-11-03 | 2002-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-04 | 2005-11-03 | 2006-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-04 | 2009-11-03 | 2010-05-05 | $7700.00 | Window Closed / Lapsed |