US5409010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vector doppler medical devices for blood velocity studies
Assignee: University of Washington
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Filing: 1992-05-19
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Granted: 1995-04-25
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Expires: 2012-05-19
Abstract
Abstract An ultrasonic pulse-echo medical device for determining the angular heading and magnitude of the velocity of blood flowing through a blood vessel by transmitting a pulsed ultrasonic beam from a single transmitting transducer and receiving echoes from sample volumes along such beam by a plurality of ultrasound receiving transducers. Independent motions in the same sample volume, such as those of a moving vessel wall and the motion of blood flowing through the blood vessel, can be separately analyzed and displayed.
Inventors
- 👤 Kirk Beach
- 👤 John Overbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:52
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/88; G01S15/89; G01S15/8906; G01S15/8979; G01S15/8984; A; A61; A61B; A61B8/00; A61B8/06; G01P; G01P5/00; G01P5/24; G01P5/241; G01P5/244; G01S15/8909; G01S15/8915; G01S15/8927; G01S7/00; G01S7/52; G01S7/52017; G01S7/52053; G01S7/52057; G01S7/52071; G01S15/02; G01S15/50; G01S15/58; G01S15/582
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
187 words
A method for determining the velocity of blood flowing through a sample volume within a blood vessel in a body, which comprises directing toward the sample volume and toward a wall of the blood vessel a pulsed ultrasound transmitting transducer, directing toward the sample volume and the wall of the blood vessel two ultrasound receiving transducers located adjacent to the transmitting transducer, respectively, along arms of an angle having its apex at the sample volume, transmitting ultrasound pulses in a beam into the sample volume from the ultrasound transmitting transducer, receiving by the ultrasound receiving transducers ultrasonic echoes of such beam from blood flowing through the blood vessel, receiving by the ultrasound receiving transducers ultrasonic echoes of such beam from the wall of the blood vessel in motion, and displaying representations of the flow of blood through such sample volume and movement of the wall of the blood vessel in accordance with such ultrasonic echoes, in which the representation of the echoes from the wall of the blood vessel are separated from the representation of the echoes from the blood flowing through the blood vessel by backprojection.
Claim 2
Independent Claim
187 words
A method for determining the velocity of blood flowing through a sample volume within a blood vessel in a body, which comprises directing toward the sample volume and toward a wall of the blood vessel a pulsed ultrasound transmitting transducer, directing toward the sample volume and the wall of the blood vessel two ultrasound receiving transducers located adjacent to the transmitting transducer, respectively, along arms of an angle having its apex at the sample volume, transmitting ultrasound pulses in a beam into the sample volume from the ultrasound transmitting transducer, receiving by the ultrasound receiving transducers ultrasonic echoes of such beam from blood flowing through the blood vessel, receiving by the ultrasound receiving transducers ultrasonic echoes of such beam from the wall of the blood vessel in motion, and displaying representations of the flow of blood through such sample volume and movement of the wall of the blood vessel in accordance with such ultrasonic echoes, in which the representation of the echoes from the wall of the blood vessel are separated from the representation of the echoes from the blood flowing through the blood vessel by backprojection.
Claim 3
Dependent Claim
33 words
The method defined in claim 1, including displaying the representation of the motion of the blood vessel wall separate from the representation of the motions of the blood flowing through the blood vessel.
Claim 4
Dependent Claim
179 words
In ultrasonic pulse-echo apparatus for determining the velocity of blood flowing through a sample volume within a blood vessel in a body including one transmitting ultrasonic transducer directed toward the sample volume and toward a wall of the blood vessel, means for generating pulsed ultrasound waves connected to the transmitting ultrasound transducer for projecting a pulsed ultrasound sound beam therefrom, two receiving ultrasonic transducers directed toward the sample volume and toward the wall of the blood vessel for receiving .echoes of the pulsed ultrasound beam, means for processing signals produced by such ultrasonic echoes received by the receiving transducers and display means activated by the processing means for displaying representations of blood flowing through such sample volume and movement of the blood vessel wall, the improvement comprising means for separately identifying echoes from blood flowing in the blood vessel through the sample volume and echoes from the blood vessel wall in motion by backprojection, and means for displaying a representation of blood flowing through the blood vessel separate from a representation of the movement of the blood vessel wall.
Claim 5
Dependent Claim
179 words
In ultrasonic pulse-echo apparatus for determining the velocity of blood flowing through a sample volume within a blood vessel in a body including one transmitting ultrasonic transducer directed toward the sample volume and toward a wall of the blood vessel, means for generating pulsed ultrasound waves connected to the transmitting ultrasound transducer for projecting a pulsed ultrasound sound beam therefrom, two receiving ultrasonic transducers directed toward the sample volume and toward the wall of the blood vessel for receiving .echoes of the pulsed ultrasound beam, means for processing signals produced by such ultrasonic echoes received by the receiving transducers and display means activated by the processing means for displaying representations of blood flowing through such sample volume and movement of the blood vessel wall, the improvement comprising means for separately identifying echoes from blood flowing in the blood vessel through the sample volume and echoes from the blood vessel wall in motion by backprojection, and means for displaying a representation of blood flowing through the blood vessel separate from a representation of the movement of the blood vessel wall.
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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) | 1998-04-24 | 1998-10-24 | 1999-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-24 | 2002-10-24 | 2003-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-24 | 2006-10-24 | 2007-04-25 | $7700.00 | Window Closed / Lapsed |