US4954318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical sensor
Assignee: Terumo Cardiovascular Systems Corp
•
Filing: 1987-08-31
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Granted: 1990-09-04
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Expires: 2007-08-31
Abstract
Abstract An apparatus for measuring the concentration of a component in a medium comprising: an optical sensor including at least one optical indicator for providing an optical signal which varies in response to the presence of a component in a medium; an optical signal fiber capable of transmitting the optical signal from the optical sensor; and a supply reservoir associated with the optical sensor and acting to provide additional optical indicator to the optical sensor.
Inventors
- 👤 Masao Yafuso
- 👤 Cheng F. Yan
- 👤 Thomas G. Hacker
- 👤 Henry K. Hui
- 👤 Thomas P. Maxwell
- 👤 William W. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:06
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/7703; G01N2021/7706; G01N2021/772
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
86 words
An apparatus for measuring the concentration of a component in a medium comprising: optical sensor means including at least one optical indicator, which optical indicator provides an optical signal which varies according to the concentration of a component in a medium; optical signal receiving means for receiving said optical signal from said optical sensor means; and supply means containing additional optical indicator, said supply means being positioned adjacent to said optical sensor means and acting to provide said additional optical indicator to said optical sensor means.
Claim 2
Independent Claim
86 words
An apparatus for measuring the concentration of a component in a medium comprising: optical sensor means including at least one optical indicator, which optical indicator provides an optical signal which varies according to the concentration of a component in a medium; optical signal receiving means for receiving said optical signal from said optical sensor means; and supply means containing additional optical indicator, said supply means being positioned adjacent to said optical sensor means and acting to provide said additional optical indicator to said optical sensor means.
Claim 3
Dependent Claim
21 words
The apparatus of claim 1 wherein said supply means provides said additional optical indicator substantially continuously to said optical sensor means.
Claim 4
Dependent Claim
25 words
The apparatus of claim 1 wherein said optical sensor means further comprises a component permeable, polymeric matrix which holds said at least one optical indicator.
Claim 5
Dependent Claim
15 words
The apparatus of claim 3 wherein said component permeable, polymeric matrix comprises a silicone polymer.
Claim 6
Dependent Claim
24 words
The apparatus of claim 1 wherein said at least one optical indicator is selected from the group consisting of fluorescence indicators and absorbance indicators.
Claim 7
Dependent Claim
16 words
The apparatus of claim 1 wherein said at least one optical indicator is a fluorescence indicator.
Claim 8
Dependent Claim
23 words
The apparatus of claim 1 wherein said optical signal receiving means further comprises means for delivering excitation light to said optical sensor means.
Claim 9
Dependent Claim
15 words
The apparatus of claim 7 wherein said optical signal receiving means comprises an optical fiber.
Claim 10
Dependent Claim
34 words
The apparatus of claim 1 wherein said supply means is positioned so that said additional optical indicator in said supply means has substantially no effect on said optical signal from said optical sensor means.
Claim 11
Dependent Claim
25 words
The apparatus of claim 1 wherein said additional optical indicator in said supply means is combined with a matrix material which is substantially component impermeable.
Claim 12
Dependent Claim
14 words
The apparatus of claim 10 wherein said substantially component impermeable matrix material is polymeric.
Claim 13
Dependent Claim
30 words
The apparatus of claim 11 wherein said polymeric matrix material is derived from at least one resin selected from the group consisting of epoxy resins, acrylic resins and mixtures thereof.
Claim 14
Dependent Claim
14 words
The apparatus of claim 1 wherein said optical sensor means abuts said supply means.
Claim 15
Dependent Claim
19 words
The apparatus of claim 1 wherein said at least one optical indicator comprises an optical indicator which senses oxygen.
Claim 16
Dependent Claim
20 words
The apparatus of claim 1 wherein said at least one optical indicator comprises an optical indicator which senses carbon dioxide.
Claim 17
Dependent Claim
20 words
The apparatus of claim 1 wherein said at least one optical indicator comprises an optical indicator which senses hydrogen ions.
Claim 18
Dependent Claim
19 words
The apparatus of claim 1 wherein said at least one optical indicator comprises an optical indicator which senses glucose.
Claim 19
Dependent Claim
20 words
The apparatus of claim 1 wherein said at least one optical indicator comprises an optical indicator which sense an electrolyte.
Claim 20
Dependent Claim
32 words
The apparatus of claim 1 wherein said at least one optical indicator comprises an optical indicator which provides an optical signal which varies according to the concentration of a component in blood.
Claim 21
Dependent Claim
19 words
The apparatus of claim 19 wherein said at least one optical indicator comprises an optical indicator which senses oxygen.
Claim 22
Dependent Claim
20 words
The apparatus of claim 19 wherein said at least one optical indicator comprises an optical indicator which senses carbon dioxide.
Claim 23
Dependent Claim
20 words
The apparatus of claim 19 wherein said at least one optical indicator comprises an optical indicator which senses hydrogen ions.
Claim 24
Dependent Claim
48 words
The apparatus of claim 1 wherein said additional optical indicator in said supply means is stored in a solid polymeric matrix which releases said additional optical indicator over time so as to keep the level of optical indicator in said optical sensor means at a relatively constant level.
Claim 25
Dependent Claim
89 words
In an apparatus for measuring the concentration of a component in a medium which apparatus includes an optical sensor having at least one optical indicator therein for providing an optical signal which varies according to the concentration of the component in the medium and optical signal receiving means for receiving said optical signal from said optical sensor, wherein the improvement comprises: supply means containing additional optical indicator, said supply means being positioned adjacent to said optical sensor so as to provide said additional optical indicator to said optical sensor.
Claim 26
Dependent Claim
89 words
In an apparatus for measuring the concentration of a component in a medium which apparatus includes an optical sensor having at least one optical indicator therein for providing an optical signal which varies according to the concentration of the component in the medium and optical signal receiving means for receiving said optical signal from said optical sensor, wherein the improvement comprises: supply means containing additional optical indicator, said supply means being positioned adjacent to said optical sensor so as to provide said additional optical indicator to said optical sensor.
Claim 27
Dependent Claim
23 words
The apparatus of claim 24 wherein said supply means comprises means for providing said additional optical indicator substantially continuously to said optical sensor.
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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) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |