US6616896B2
Expired / Lapsed
US
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Oxygen monitoring apparatus
Assignee: Respironics Inc
•
Filing: 2001-04-24
•
Granted: 2003-09-09
•
Expires: 2021-04-24
Abstract
Abstract Apparatus or systems which employ luminescence quenching to produce a signal indicative of oxygen concentration. Components of such systems include: an airway adapter, sampling cell, or the like, having a sensor which is excited into luminescence with the luminescence decaying in a manner reflecting the concentration of oxygen in gases flowing through the airway adapter or other flow device; a transducer which has a light source for exciting a luminescable composition in the sensor into luminescence and a light sensitive detector for converting energy emitted from the luminescing composition as that composition is quenched into an electrical signal indicative of oxygen concentration in the gases being monitored; and subsystems for maintaining the sensor temperature constant and for processing the signal generated by the light sensitive detector. Sensors for systems of the character just described, methods of fabricating those sensors, and methods for installing the sensors in the flow device are also described.
Inventors
- 👤 Lawrence L. Labuda
- 👤 Perry R. Blazewicz
- 👤 Leslie E. Mace
- 👤 Jerry R. Apperson
- 👤 Walter A. Cooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:05
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/08; A61B5/097; A61B5/083; A61B5/0833; G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/64; G01N21/6428; A61B2562/00; A61B2562/02; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/207497; Y10T436/209163
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
119 words
A respiratory flow component of an oxygen monitoring apparatus, comprising: a flow passage; a luminescable composition having a window adjacent thereto, said luminescable composition in communication with said flow passage and positioned so as to be exposed to gases flowing through the respiratory flow component, luminescence of said luminescable composition being quenched when said luminescable composition is exposed to oxygen; and a thermal communication component in contact with at least one of said luminescable composition and a matrix or support structure for said luminescable composition, said thermal communication component configured to effect at least one of: preventing condensation from collecting on said window; monitoring of a temperature of said luminescable composition; and maintaining a temperature of said luminescable composition.
Claim 2
Dependent Claim
119 words
A respiratory flow component of an oxygen monitoring apparatus, comprising: a flow passage; a luminescable composition having a window adjacent thereto, said luminescable composition in communication with said flow passage and positioned so as to be exposed to gases flowing through the respiratory flow component, luminescence of said luminescable composition being quenched when said luminescable composition is exposed to oxygen; and a thermal communication component in contact with at least one of said luminescable composition and a matrix or support structure for said luminescable composition, said thermal communication component configured to effect at least one of: preventing condensation from collecting on said window; monitoring of a temperature of said luminescable composition; and maintaining a temperature of said luminescable composition.
Claim 3
Dependent Claim
12 words
The respiratory flow component of claim 1 , comprising an airway adapter.
Claim 4
Dependent Claim
19 words
The respiratory flow component of claim 1 , further comprising a sidestream conduit in communication with said flow passage.
Claim 5
Dependent Claim
19 words
The respiratory flow component of claim 3 , further comprising a sampling cell in communication with said sidestream conduit.
Claim 6
Dependent Claim
35 words
The respiratory flow component of claim 1 , comprising at least one window to facilitate transmission of electromagnetic radiation from a radiation source to said luminescable composition and from said luminescable composition to a detector.
Claim 7
Dependent Claim
14 words
The respiratory flow component of claim 1 , further comprising an optical filtering element.
Claim 8
Dependent Claim
31 words
The respiratory flow component of claim 6 , wherein said optical filtering element is located to prevent said luminescable composition from being exposed to electromagnetic radiation of at least one wavelength.
Claim 9
Dependent Claim
33 words
The respiratory flow component of claim 6 , wherein said optical filtering element is located to prevent a detector from receiving at least one wavelength of electromagnetic radiation emitted from said luminescable composition.
Claim 10
Dependent Claim
27 words
The respiratory flow component of claim 1 , wherein said luminescable composition is excited by at least one wavelength of electromagnetic radiation in the visible light range.
Claim 11
Dependent Claim
31 words
The respiratory flow component of claim 1 , wherein said luminescable composition is excited by at least one wavelength of electromagnetic radiation of from about 300 nm to about 600 nm.
Claim 12
Dependent Claim
25 words
The respiratory flow component of claim 1 , wherein said luminescable composition is excited by at least a blue or green wavelength of visible light.
Claim 13
Dependent Claim
30 words
The respiratory flow component of claim 1 , wherein said luminescable composition is not substantially excited by at least one of an orange, red, and infrared wavelength of electromagnetic radiation.
Claim 14
Dependent Claim
29 words
The respiratory flow component of claim 1 , wherein said luminescable composition emits at least one wavelength of electromagnetic radiation of from about 500 nm to about 1,100 nm.
Claim 15
Dependent Claim
26 words
The respiratory flow component of claim 1 , wherein said luminescable composition has an excitation decay time of from about 1 μs to about 100 μs.
Claim 16
Dependent Claim
17 words
The respiratory flow component of claim 1 , wherein said luminescable composition comprises a phosphorescent organometallic complex.
Claim 17
Dependent Claim
16 words
The respiratory flow component of claim 1 , wherein said luminescable composition comprises a fluorinated porphyrin.
Claim 18
Dependent Claim
33 words
The respiratory flow component of claim 1 , wherein said luminescable composition comprises at least one of palladium mesotetraphenyl porphine, platinum meso-tetraphenyl porphine, palladium meso-tetra (perfluoro) phenyl porphine, and platinum meso-tetra (perfluoro) porphine.
Claim 19
Dependent Claim
17 words
The respiratory flow component of claim 1 , wherein said luminescable composition is carried by a matrix.
Claim 20
Dependent Claim
14 words
The respiratory flow component of claim 18 , wherein said matrix comprises a polymer.
Claim 21
Dependent Claim
15 words
The respiratory flow component of claim 19 , wherein said polymer comprises a hydrophobic polymer.
Claim 22
Dependent Claim
36 words
The respiratory flow component of claim 19 , wherein said polymer comprises at least one of a silicone, a polycarbonate, a polystyrene, a polymethyl methacrylate, a polyvinyl chloride, a polypropylene, a polyester, and an acrylic copolymer.
Claim 23
Dependent Claim
15 words
The respiratory flow component of claim 19 , wherein said polymer comprises a track-etched polycarbonate.
Claim 24
Dependent Claim
22 words
The respiratory flow component of claim 18 , wherein said matrix has a thickness of about 5 μm to about 20 μm.
Claim 25
Dependent Claim
23 words
The respiratory flow component of claim 18 , wherein said matrix includes pores having sizes of about 0.1 μm to about 10 μm.
Claim 26
Dependent Claim
18 words
The respiratory flow component of claim 1 , wherein said luminescable composition is positioned within said flow passage.
Claim 27
Dependent Claim
18 words
The respiratory flow component of claim 4 , wherein said luminescable composition is located within said sampling cell.
Claim 28
Dependent Claim
37 words
The respiratory flow component of claim 4 , further comprising a pump in communication with said sidestream conduit, said pump being configured to effect a flow of one or more gases into contact with said luminescable composition.
Claim 29
Dependent Claim
20 words
The respiratory flow component of claim 27 , further comprising a pump controller for controlling pressure within said sampling cell.
Claim 30
Dependent Claim
26 words
The respiratory flow component of claim 28 , wherein said pump controller operates based on signals from a pressure transducer in communication with said sampling cell.
Claim 31
Dependent Claim
28 words
The respiratory flow component of claim 27 , further comprising an accumulator in communication with said flow passage to dampen pressure pulses generated by operation of said pump.
Claim 32
Dependent Claim
28 words
The respiratory flow component of claim 27 , further comprising a flow restrictor in said flow passage to further dampen pressure pulses generated by operation of said pump.
Claim 33
Dependent Claim
27 words
The respiratory flow component of claim 4 , further comprising a pressure transducer configured to compare an actual pressure in said sampling cell with a baseline pressure.
Claim 34
Dependent Claim
29 words
The respiratory flow component of claim 32 , further comprising an alarm that is activated if said actual pressure in said sampling cell varies significantly from said baseline pressure.
Claim 35
Dependent Claim
55 words
The respiratory flow component of claim 32 , wherein said pressure transducer comprises: an absolute pressure transducer; a differential pressure transducer; and a valve which is selectively operable to provide communication between said flow passage and said absolute pressure transducer, said flow passage and ambient surroundings, and said flow passage and said differential pressure transducer.
Claim 36
Dependent Claim
27 words
The respiratory flow component of claim 32 , wherein said pressure transducer comprises a differential pressure transducer and further including a flow restrictor in said flow passage.
Claim 37
Dependent Claim
28 words
The respiratory flow component of claim 4 , wherein said sampling cell communicates with ambient surroundings to establish atmospheric pressure as a baseline pressure in said sampling cell.
Claim 38
Dependent Claim
19 words
The respiratory flow component of claim 4 , wherein said sampling cell is removable from the oxygen monitoring apparatus.
Claim 39
Dependent Claim
34 words
The respiratory flow component of claim 1 , wherein said thermal communication component comprises at least a portion of a temperature control component configured to maintain said luminescable composition at a substantially constant temperature.
Claim 40
Dependent Claim
40 words
The respiratory flow component of claim 38 , comprising a first member of said temperature control component, a transducer component that is configured to be assembled with the respiratory flow component comprising a second member of said temperature control component.
Claim 41
Dependent Claim
35 words
The respiratory flow component of claim 39 , wherein, upon assembly of the respiratory flow component and the transducer component, said first and second members of said temperature control component are biased against one another.
Claim 42
Dependent Claim
16 words
The respiratory flow component of claim 39 , wherein said first member comprises a thermal capacitor.
Claim 43
Dependent Claim
24 words
The respiratory flow component of claim 41 , wherein said thermal capacitor is in intimate contact with a matrix that carries said luminescable composition.
Claim 44
Dependent Claim
33 words
The respiratory flow component of claim 41 , wherein said thermal capacitor provides at least one of a heat sink and a support for a matrix on which said luminescable composition is carried.
Claim 45
Dependent Claim
42 words
The respiratory flow component of claim 42 , wherein said thermal capacitor and adjacent edges of an aperture of the respiratory flow component within which said thermal capacitor is at least partially located retain at least edge portions of said matrix therebetween.
Claim 46
Dependent Claim
36 words
The respiratory flow component of claim 39 , including a resiliently displaceable member which is configured to be displaced and to expose said first member upon assembly of the respiratory flow component with the transducer component.
Claim 47
Dependent Claim
34 words
The respiratory flow component of claim 39 , further comprising a temperature sensor configured to sense a temperature of at least one of said temperature control component, said first member, and said second member.
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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) | 2006-09-08 | 2007-03-10 | 2007-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-09-08 | 2011-03-10 | 2011-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-09-08 | 2015-03-10 | 2015-09-09 | $7700.00 | Window Closed / Lapsed |