Patent US5820586A successfully refreshed from Google Patents.
US5820570A
Expired / Lapsed
US
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Interstitial fluid collection and constituent measurement
Assignee: Diabetes Diagnostics Inc
•
Filing: 1997-08-27
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Granted: 1998-10-13
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Expires: 2017-08-27
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 16:36
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: 18
Claim 1
Independent Claim
71 words
A method for testing a sample of body fluid, said method comprising: forming an artificial opening through a patient's skin with said opening extending into but not through a dermal layer of said skin with said opening sized to access a constituent-containing, substantially blood-free fluid in said dermal layer without penetrating blood laden capillaries; drawing a sample of said blood-free fluid through said opening; and testing said sample for said constituent.
Claim 2
Independent Claim
71 words
A method for testing a sample of body fluid, said method comprising: forming an artificial opening through a patient's skin with said opening extending into but not through a dermal layer of said skin with said opening sized to access a constituent-containing, substantially blood-free fluid in said dermal layer without penetrating blood laden capillaries; drawing a sample of said blood-free fluid through said opening; and testing said sample for said constituent.
Claim 3
Dependent Claim
11 words
A method according to claim 1 wherein said constituent is glucose.
Claim 4
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 5
Dependent Claim
12 words
A method according to claim 1 wherein said sample is tested colorimetrically.
Claim 6
Dependent Claim
12 words
A method according to claim 1 wherein said sample is tested electro-chemically.
Claim 7
Dependent Claim
15 words
A method according to claim 1 wherein said sample is tested by attenuated total reflection.
Claim 8
Dependent Claim
24 words
A method according to claim 1 wherein said opening is formed by insertion of a penetrating member into and not through said dermal layer.
Claim 9
Dependent Claim
16 words
A method according to claim 1 comprising compressing said skin in a region surrounding said opening.
Claim 10
Independent Claim
64 words
A method for testing a sample of body fluid, said method comprising: inserting a penetration member into a patient's skin with said penetration member extending into but not through a dermal layer of said skin with said penetration member sized to access a constituent-containing, substantially blood-free fluid in said dermal layer without penetrating blood laden capillaries; and testing said accessed fluid for said constituent.
Claim 11
Independent Claim
64 words
A method for testing a sample of body fluid, said method comprising: inserting a penetration member into a patient's skin with said penetration member extending into but not through a dermal layer of said skin with said penetration member sized to access a constituent-containing, substantially blood-free fluid in said dermal layer without penetrating blood laden capillaries; and testing said accessed fluid for said constituent.
Claim 12
Dependent Claim
11 words
A method according to claim 9 wherein said constituent is glucose.
Claim 13
Dependent Claim
12 words
A method according to claim 9 wherein said sample is tested colorimetrically.
Claim 14
Dependent Claim
12 words
A method according to claim 9 wherein said sample is tested electrochemically.
Claim 15
Dependent Claim
15 words
A method according to claim 9 wherein said sample is tested by attenuated total reflection.
Claim 16
Dependent Claim
11 words
A method according to claim 9 wherein said constituent is glucose.
Claim 17
Dependent Claim
13 words
A method according to claim 9 wherein said penetration member is a needle.
Claim 18
Dependent Claim
22 words
A method according to claim 15 wherein said fluid is drawn out of said layer through said needle prior to said testing.
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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) | 2001-10-12 | 2002-04-13 | 2002-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-12 | 2006-04-13 | 2006-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-12 | 2010-04-13 | 2010-10-13 | $7700.00 | Window Closed / Lapsed |