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US5163445A
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US
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Apparatus, system and method for measuring spatial average velocity and/or volumetric flow of blood in a vessel and screw joint for use therewith
Assignee: Jomed Inc
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Filing: 1991-09-13
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Granted: 1992-11-17
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Expires: 2011-09-13
Abstract
Abstract System for measuring a characteristic of flow of liquid in a vessel of a patient comprising a transducer positioned in a vessel in a patient for supplying ultrasonic energy. The transducer produces a substantially uniform beam which encompasses the vessel. The transducer receives ultrasonic energy back scattered from the red blood cells and provides an electrical output signal. A first moment detector is provided which receives the electrical output from the transducer and provides a first moment signal. Normalization is provided to the output of the first moment detector to provide an electrical output representing a characteristic of the flow of the liquid in the vessel.
Inventors
- 👤 Jeffrey J. Christian
- 👤 Paul D. Corl
- 👤 Jerome Segal
- 👤 Ronald G. Williams
- 👤 Wayne C. Haase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:16
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/06; A61B8/12; A61B8/44; A61B8/4444; A61B8/445; A61M; A61M25/00; A61M25/01; A61M25/09; G; G01; G01F; G01F1/00; G01F1/66; G01F1/663; A61M2025/09175
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
120 words
In a joint construction for a medical guide wire joining a tubular member to a helical coil having an elongate element extending therethrough, the tubular member having an outside diameter no greater than the outside diameter of the coil and having a wall defining a passage extending therethrough and having an exterior surface, the tubular member having an end portion with a helical recess formed therein extending through said outer surface to form a helical thread, said helical coil having a passage extending therethrough and having an end portion threaded into the helical recess to fixedly secure the coil to the tubular member so that the passage in the tubular member and the passage in the coil are in alignment.
Claim 2
Dependent Claim
120 words
In a joint construction for a medical guide wire joining a tubular member to a helical coil having an elongate element extending therethrough, the tubular member having an outside diameter no greater than the outside diameter of the coil and having a wall defining a passage extending therethrough and having an exterior surface, the tubular member having an end portion with a helical recess formed therein extending through said outer surface to form a helical thread, said helical coil having a passage extending therethrough and having an end portion threaded into the helical recess to fixedly secure the coil to the tubular member so that the passage in the tubular member and the passage in the coil are in alignment.
Claim 3
Dependent Claim
91 words
A construction as in claim 1 wherein the tubular member has another end portion with a helical recess therein extending through the outer surface of the wall to form another helical thread together with another helical coil having a passage extending therethrough and having an end portion threaded into said another helical thread of said another end portion of the tubular member to fixedly secure said another coil to said tubular member so that the passage in said another helical coil is in alignment with the passage in the tubular member.
Claim 4
Dependent Claim
20 words
A construction as in claim 1 wherein the threads have a density ranging from 75 to 150 threads per inch.
Claim 5
Dependent Claim
18 words
A construction as in claim 1 wherein the threads have a density of approximately 108 threads per inch.
Claim 6
Dependent Claim
14 words
A construction as in claim 1 wherein approximately 2.5 to 5.0 threads are provided.
Claim 7
Dependent Claim
18 words
A construction as in claim 1 wherein the threads only extend partially through the wall of the member.
Claim 8
Dependent Claim
14 words
A construction as in claim 1 wherein the threads are rectangular in cross section.
Claim 9
Dependent Claim
59 words
A construction as in claim 1 wherein the coil has an outer surface, and wherein the outer surface of the tubular member and of the coil are of the same size and with the helical recess being of a depth so that the outer surface of the coil spring is flush with the outer surface of the tubular member.
Claim 10
Dependent Claim
17 words
A construction as in claim 1 wherein said coil is in the form of a flexible spring.
Claim 11
Dependent Claim
20 words
A construction as in claim 1 wherein said coil and said another coil are in the form of flexible springs.
References Cited (Backward Citations)
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US2514394A
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US4282885A
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US4481953A
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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) | 1995-11-17 | 1996-05-18 | 1996-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-17 | 2000-05-18 | 2000-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-17 | 2004-05-18 | 2004-11-17 | $7700.00 | Window Closed / Lapsed |