US6203504B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enhanced interstitial fluid collection
Assignee: Diabetes Diagnostics Inc
•
Filing: 1999-03-03
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Granted: 2001-03-20
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Expires: 2019-03-03
Abstract
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.
Inventors
- 👤 Scott T. Latterell
- 👤 Paul D. Brinda
- 👤 Michael E. Hilgers
- 👤 Michael J. Shoup
- 👤 Thomas B. Hoegh
- 👤 Brian J. Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:16
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/1455; A61B10/00; A61B10/0045; A61B5/14507; A61B5/1451; A61B5/14514; A61B5/14532; A61B5/15; A61B5/150007; A61B5/150015; A61B5/150022; A61B5/150053; A61B5/150061; A61B5/150068; A61B5/150106; A61B5/150114; A61B5/150358; A61B5/150374; A61B5/150381; A61B5/150389; A61B5/150503; A61B5/151; A61B5/15101; A61B5/15103; A61B5/15107; A61B5/15109; A61B5/15113; A61B5/15115; A61B5/15117; A61B5/15186; A61B5/15188; A61B5/1519; A61B5/15192; A61B5/15194; A61B5/157; A61B2010/008; A61B2562/00; A61B2562/02; A61B2562/0295
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
96 words
A method of inserting a needle into a skin layer, the needle having a distal end, a first pressure surface being movable along a path parallel to an axis of the needle, the method comprising: biasing a first pressure surface so that the distal end of the needle is recessed behind the pressure surface; and pressing the first pressure surface against the skin layer with a force sufficient to form a pressurized zone of interstitial fluid opposing the needle and to cause the needle to extend past the first pressure surface and into the skin layer.
Claim 2
Independent Claim
96 words
A method of inserting a needle into a skin layer, the needle having a distal end, a first pressure surface being movable along a path parallel to an axis of the needle, the method comprising: biasing a first pressure surface so that the distal end of the needle is recessed behind the pressure surface; and pressing the first pressure surface against the skin layer with a force sufficient to form a pressurized zone of interstitial fluid opposing the needle and to cause the needle to extend past the first pressure surface and into the skin layer.
Claim 3
Dependent Claim
36 words
The method of claim 1 wherein pressing the first pressure surface against the skin layer with a force sufficient to extend the needle past the first pressure surface and into, but not through, the skin layer.
Claim 4
Dependent Claim
33 words
The method of claim 2 wherein a second pressure surface is spaced axially from the distal end of the needle, the method further comprising pressing the second pressure surface against the skin layer.
Claim 5
Dependent Claim
33 words
The method of claim 3 wherein pressing the second pressure surface against the skin layer increases the pressure at the pressurized zone of interstitial fluid that is formed by the first pressure surface.
Claim 6
Dependent Claim
22 words
The method of claim 3 further comprising biasing the second pressure surface, thereby urging the needle outwardly of the first pressure surface.
Claim 7
Dependent Claim
34 words
The method of claim 5 wherein the first pressure surface is biased with a spring preloaded with a force of about 3 lbs. and with a spring constant of about 4 lbs. per inch.
Claim 8
Dependent Claim
34 words
The method of claim 5 wherein the second pressure surface is biased with a spring preloaded with a force of about 1 lbs. and with a spring constant of about 2 lbs. per inch.
Claim 9
Dependent Claim
10 words
The method of claim 1 further comprising collecting interstitial fluid.
Claim 10
Dependent Claim
20 words
The method of claim 8 further comprising deposing at least a portion of the collected interstitial fluid on a membrane.
Claim 11
Dependent Claim
16 words
The method of claim 8 further comprising determining the level of glucose in the interstitial fluid.
Claim 12
Dependent Claim
46 words
The method of claim 10 wherein causing the needle to extend past the first pressure surface and into the skin layer includes creating a hole in the skin layer, the method further comprising: withdrawing the needle from the skin layer; and drawing fluid from the hole.
Claim 13
Dependent Claim
15 words
The method of claim 11 further comprising relaxing pressure caused by the first pressure surface.
Claim 14
Dependent Claim
11 words
The method of claim 11 wherein the fluid is interstitial fluid.
Claim 15
Dependent Claim
16 words
The method of claim 13 wherein the needle extends into, but not through, the skin layer.
Claim 16
Dependent Claim
21 words
The method of claim 14 wherein the needle defines a fluid path and the fluid is drawn through the fluid path.
Claim 17
Independent Claim
177 words
A method of inserting a needle into a skin layer, the needle having a distal end, a first pressure surface being movable along a path parallel to an axis of the needle, and a second pressure surface is spaced axially from the distal end of the needle, the method comprising: biasing a first pressure surface so that the distal end of the needle is recessed behind the pressure surface; pressing the first pressure surface against the skin layer with a force sufficient to form a pressurized zone of interstitial fluid opposing the needle and to cause the needle to extend past the first pressure surface and into the skin layer; pressing the first pressure surface against the skin layer with a force sufficient to extend the needle past the first pressure surface and into, but not through, the skin layer; biasing the second pressure surface, thereby urging the needle outwardly of the first pressure surface pressing the second pressure surface against the skin layer; collecting interstitial fluid; and determining the level of glucose in the interstitial fluid.
Claim 18
Independent Claim
177 words
A method of inserting a needle into a skin layer, the needle having a distal end, a first pressure surface being movable along a path parallel to an axis of the needle, and a second pressure surface is spaced axially from the distal end of the needle, the method comprising: biasing a first pressure surface so that the distal end of the needle is recessed behind the pressure surface; pressing the first pressure surface against the skin layer with a force sufficient to form a pressurized zone of interstitial fluid opposing the needle and to cause the needle to extend past the first pressure surface and into the skin layer; pressing the first pressure surface against the skin layer with a force sufficient to extend the needle past the first pressure surface and into, but not through, the skin layer; biasing the second pressure surface, thereby urging the needle outwardly of the first pressure surface pressing the second pressure surface against the skin layer; collecting interstitial fluid; and determining the level of glucose in the interstitial 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) | 2004-03-19 | 2004-09-18 | 2005-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-03-19 | 2008-09-18 | 2009-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-03-19 | 2012-09-18 | 2013-03-20 | $7700.00 | Window Closed / Lapsed |