Patent US3975662A successfully refreshed from Google Patents.
US5152291A
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Acoustic fiber measurement of intravascular blood
Assignee: HP Inc
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Filing: 1990-09-07
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Granted: 1992-10-06
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Expires: 2010-09-07
Abstract
Abstract One or more acoustic fiber guides are used to carry certain modes of acoustic energy to the tip of a catheter. Using these fibers, reflected sound (Doppler Sound) measurements are made in a blood environment without the risk to the patient associated with the use of an electrical transducer at the distal end of the catheter. Due to the size reduction provided, the Doppler probe is suitable for monitoring the blood flow in the coronary arteries. Using this invention wherein sound is transported to the catheter tip, risk is reduced and the catheter is significantly less expensive, and therefore can be treated as disposable. By the addition of optical fibers tipped with specific dyes and excited by optical energy of appropriate wavelength, the catheter tip system can also be utilized simultaneously as a combined (integral) optical blood gas and pH monitor using optical fluorescence and an acoustic Doppler velocity transducer.
Inventors
- 👤 J. Fleming Dias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:48
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/06; A61B5/00; A61B5/145; A61B5/1455; A61B5/1459; A61B8/12; G; G10; G10K; G10K11/00; G10K11/18; G10K11/24; A61B17/00; A61B17/22; A61B17/22004; A61B17/22012; A61B2017/22014; A61B2017/22015; A61B2017/22017; A61B8/44; A61B8/4444; A61B8/445
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
84 words
A system for measuring a physical parameter of fluid flow within a vessel comprising: a source of excitation acoustical energy located outside of said vessel; one or more acoustical fiber means for coupling said excitation acoustical energy to a selected location within said vessel for measuring said physical parameter; and one or more acoustical fiber means for coupling returning acoustical energy from said location within said vessel to a measurement device means for measuring flow within said vessel responsive to said returning acoustical energy.
Claim 2
Independent Claim
84 words
A system for measuring a physical parameter of fluid flow within a vessel comprising: a source of excitation acoustical energy located outside of said vessel; one or more acoustical fiber means for coupling said excitation acoustical energy to a selected location within said vessel for measuring said physical parameter; and one or more acoustical fiber means for coupling returning acoustical energy from said location within said vessel to a measurement device means for measuring flow within said vessel responsive to said returning acoustical energy.
Claim 3
Dependent Claim
22 words
A system as in claim 1 wherein said means for coupling are housed within a catheter device for insertion into said vessel.
Claim 4
Dependent Claim
39 words
A system as in claim 1 wherein said means for coupling returning acoustical energy comprises a plurality of acoustical return paths, and said means for coupling excitation acoustical energy is located centrally to said plurality of acoustical return paths.
Claim 5
Dependent Claim
29 words
A system as in claim 1 wherein said physical parameter is fluid flow rate and said returning acoustical energy is Doppler Shifted in frequency from said excitation acoustical energy.
Claim 6
Dependent Claim
14 words
A system as in claim 1 wherein said excitation acoustical energy comprises ultrasonic sound.
Claim 7
Dependent Claim
19 words
A system as in claim 1 which further comprises a wire guide for guiding said fibers within said vessel.
Claim 8
Dependent Claim
57 words
A system as in claim 1 which further comprises: a source of excitation optical energy located outside of said vessel; means for coupling said excitation optical energy from said source of excitation optical energy to said selected location; and means for coupling returning optical energy from said selected location to a measurement device for detecting gas concentration.
Claim 9
Dependent Claim
33 words
A system as in claim 7 wherein said means for coupling said acoustical energies and said means for coupling said optical energies are housed within a catheter device for insertion into said vessel.
Claim 10
Dependent Claim
34 words
A system as in claim 8 wherein said means for coupling said acoustical energies, comprise, one or more acoustical fibers and said means for coupling said optical energies comprise one or more optical fibers.
Claim 11
Independent Claim
113 words
A system for detecting measuring fluid flow within a vessel comprising: a source of excitation acoustical energy, located outside of said vessel; a catheter means for insertion into said vessel to a selected location at which fluid flow is to be measured; one or more acoustical fiber means for coupling via said catheter said excitation acoustical energy from said source to said selected location; one or more acoustical fiber means for detecting fluid flow in response to returning energy produced as a function of said excitation energy and said fluid flow; and one or more acoustical fiber means for coupling returning energy from said selected location to said means for detecting fluid flow.
Claim 12
Independent Claim
113 words
A system for detecting measuring fluid flow within a vessel comprising: a source of excitation acoustical energy, located outside of said vessel; a catheter means for insertion into said vessel to a selected location at which fluid flow is to be measured; one or more acoustical fiber means for coupling via said catheter said excitation acoustical energy from said source to said selected location; one or more acoustical fiber means for detecting fluid flow in response to returning energy produced as a function of said excitation energy and said fluid flow; and one or more acoustical fiber means for coupling returning energy from said selected location to said means for detecting fluid flow.
Claim 13
Dependent Claim
39 words
A system as in claim 10 wherein said means for coupling returning acoustical energy comprises a plurality of acoustical return paths, and said means for coupling excitation acoustical energy is located centrally to said plurality of acoustical return paths.
Claim 14
Dependent Claim
26 words
A system as in claim 10 wherein said returning acoustical energy is Doppler shifted from said excitation acoustical energy as a function of said fluid flow.
Claim 15
Dependent Claim
14 words
A system as in claim 10 wherein said excitation acoustical energy comprises ultrasonic sound.
Claim 16
Dependent Claim
84 words
A system as in claim 10 which further comprises: a source of excitation optical energy located outside of said vessel; means for coupling via said catheter said excitation optical energy from said source of excitation optical energy to said selected location; means for detecting gas concentration in response to returning optical energy produced as a function of said excitation optical energy and said gas concentration; and means for coupling returning optical energy from said selected location to a measurement device for detecting gas concentration.
Claim 17
Dependent Claim
29 words
A system as in claim 14 wherein said means for coupling said excitation acoustical energy and said means for coupling said excitation optical energy comprises the same optical fiber.
Claim 18
Dependent Claim
20 words
A system as in claim 10 wherein said means for coupling said optical energies comprise one or more optical fibers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-10-06 | 1996-04-06 | 1996-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-06 | 2000-04-06 | 2000-10-06 | $3760.00 | Window Closed / Lapsed |
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