US5079421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Invasive FTIR blood constituent testing
Assignee: Diabetes Diagnostics Inc
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Filing: 1990-12-04
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Granted: 1992-01-07
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Expires: 2010-12-04
Abstract
Abstract An apparatus is disclosed for measuring a blood constituent. In a preferred embodiment, the apparatus includes a semipermeable membrane for defining a volume with a flexible membrane disposed on one end and with a light source disposed on an opposite end. The flexible membrane flexes to become the moving mirror in an FTIR system.
Inventors
- 👤 Mark B. Knudson
- 👤 James E. Shapland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:50
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/14532; A61B5/1455; A61B5/68; A61B5/6801; A61B5/6813; A61B5/6814; A61B5/6815; A61B5/6817
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
111 words
An apparatus for determining a level of a constituent in a body fluid contained within a body tissue, said apparatus comprising: volume defining means for defining a bounded volume containing said body fluid, said volume defining means sized to be received within an anatomical space and having means to admit said fluid from said space into said bounded volume; a light source extending into said bounded volume for directing a test beam through said fluid within said volume; a flexible membrane disposed within said volume and disposed to reflect said test beam, said flexible membrane selectively movable within said bounded volume when said volume defining means is received within said space.
Claim 2
Independent Claim
111 words
An apparatus for determining a level of a constituent in a body fluid contained within a body tissue, said apparatus comprising: volume defining means for defining a bounded volume containing said body fluid, said volume defining means sized to be received within an anatomical space and having means to admit said fluid from said space into said bounded volume; a light source extending into said bounded volume for directing a test beam through said fluid within said volume; a flexible membrane disposed within said volume and disposed to reflect said test beam, said flexible membrane selectively movable within said bounded volume when said volume defining means is received within said space.
Claim 3
Dependent Claim
41 words
An apparatus according to claim 1 wherein said volume defining means includes a semipermeable membrane having first and second ends; said light source including a light wave guide disposed within said first end; said flexible membrane disposed on said second end.
Claim 4
Independent Claim
115 words
An apparatus for determining a level of a constituent in a body fluid contained within a body tissue, said apparatus comprising: volume defining means for defining a bounded volume containing said body fluid, said volume defining means including a semipermeable membrane having first and second ends; a light source extending into said bounded volume for directing a test beam through said fluid within said volume, said light source including a light wave guide disposed within said first end; a flexible membrane disposed within said volume on said second end and disposed to reflect said test beam, said flexible membrane being a piezoelectric film flexible in response to a change in a charge across said membrane.
Claim 5
Independent Claim
115 words
An apparatus for determining a level of a constituent in a body fluid contained within a body tissue, said apparatus comprising: volume defining means for defining a bounded volume containing said body fluid, said volume defining means including a semipermeable membrane having first and second ends; a light source extending into said bounded volume for directing a test beam through said fluid within said volume, said light source including a light wave guide disposed within said first end; a flexible membrane disposed within said volume on said second end and disposed to reflect said test beam, said flexible membrane being a piezoelectric film flexible in response to a change in a charge across said membrane.
Claim 6
Independent Claim
113 words
An apparatus for determining a level of a constituent in a body fluid contained within a body tissue, said apparatus comprising: volume defining means for defining a bounded volume containing said body fluid, said volume defining means including a semipermeable membrane having first and second ends; a light source extending into said bounded volume for directing a test beam through said fluid within said volume, said light source including a light wave guide disposed within said first end; a flexible membrane disposed within said volume on said second end and disposed to reflect said test beam, said flexible membrane selected to be flexible in response to an application of energy on said membrane.
Claim 7
Independent Claim
113 words
An apparatus for determining a level of a constituent in a body fluid contained within a body tissue, said apparatus comprising: volume defining means for defining a bounded volume containing said body fluid, said volume defining means including a semipermeable membrane having first and second ends; a light source extending into said bounded volume for directing a test beam through said fluid within said volume, said light source including a light wave guide disposed within said first end; a flexible membrane disposed within said volume on said second end and disposed to reflect said test beam, said flexible membrane selected to be flexible in response to an application of energy on said membrane.
Claim 8
Independent Claim
97 words
An apparatus for determining a level of a constituent in a body fluid contained within a body tissue, said apparatus comprising: volume defining means for defining a bounded volume containing said body fluid; a light source extending into said bounded volume for directing a test beam through said fluid within said volume; a flexible membrane disposed within said volume and disposed to reflect said test beam; said volume defining means, said light source and said flexible membrane are included in a Fourier transform infrared spectrometric system with said flexible membrane being a moving mirror in said system.
Claim 9
Independent Claim
97 words
An apparatus for determining a level of a constituent in a body fluid contained within a body tissue, said apparatus comprising: volume defining means for defining a bounded volume containing said body fluid; a light source extending into said bounded volume for directing a test beam through said fluid within said volume; a flexible membrane disposed within said volume and disposed to reflect said test beam; said volume defining means, said light source and said flexible membrane are included in a Fourier transform infrared spectrometric system with said flexible membrane being a moving mirror in said system.
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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) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |