US4887606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use in cannulation of blood vessels
Assignee: ESCALON VASCULAR IP HOLDINGS Inc
•
Filing: 1989-01-11
•
Granted: 1989-12-19
•
Expires: 2009-01-11
Abstract
Abstract Apparatus for use in cannulation of blood vessels includes a hollow needle having a sharpened end for penetrating tissue, a trocar including a transducer mounted on one end for positioning within the hollow needle for transmitting and receiving ultrasonic waves through the sharpened end of the needle. The trocar further includes a support rod for the transducer and ultrasound damping material attaching the transducer to the support rod. Electrical conductors are provided through the support rod or on the surface of the support rod in contact with electrodes on the front and back surfaces of the transducer for transmitting electrical signals to and from the transducer. A syringe portion is detachably detached from the needle for receiving the back flow of blood when the needle is inserted into a blood vessel.
Inventors
- 👤 Paul G. Yock
- 👤 Alan R. Selfridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:01
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0606; A61B; A61B17/00; A61B17/34; A61B17/3403; A61B8/00; A61B8/08; A61B8/0833; A61B8/12; A61M5/00; A61M5/42; A61M5/427; A61B2017/3413
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
146 words
Apparatus for use in cannulation of blood vessels comprising a hollow needle having a sharpened end for penetrating tissue, a stylet positioned within said needle and including an ultrasound transducer at one end for transmitting and receiving ultrasonic waves through the sharpened end of said needle, a support rod for supporting said transducer, means attaching said transducer to said support rod, coaxial electrical conductors associated with said support rod for transmitting electrical signals to and from said transducer, including a wire extending through said support rod electrically connected with a back surface of said transducer, and a metal conductor on the surface of said rod electrically interconnected with a front surface of said transducer, said metal conductor and support rod being spaced from said needle to facilitate back flow of blood when a blood vessel is penetrated, and a syringe portion detachably attached to said needle.
Claim 2
Dependent Claim
146 words
Apparatus for use in cannulation of blood vessels comprising a hollow needle having a sharpened end for penetrating tissue, a stylet positioned within said needle and including an ultrasound transducer at one end for transmitting and receiving ultrasonic waves through the sharpened end of said needle, a support rod for supporting said transducer, means attaching said transducer to said support rod, coaxial electrical conductors associated with said support rod for transmitting electrical signals to and from said transducer, including a wire extending through said support rod electrically connected with a back surface of said transducer, and a metal conductor on the surface of said rod electrically interconnected with a front surface of said transducer, said metal conductor and support rod being spaced from said needle to facilitate back flow of blood when a blood vessel is penetrated, and a syringe portion detachably attached to said needle.
Claim 3
Dependent Claim
21 words
Apparatus as defined by claim 1 wherein said transducer includes metal contacts on said front and back surfaces of said transducer.
Claim 4
Dependent Claim
20 words
Apparatus as defined by claim 1 wherein said means attaching said transducer to said rod includes an ultrasound damping material.
Claim 5
Dependent Claim
100 words
For use in apparatus for cannulation of blood vessels, a stylet for positioning within a hollow needle and comprising a support rod, an ultrasound transducer at one end of said support rod for transmitting and receiving ultrasonic waves, means attaching said transducer to said support rod, and coaxial electrical conductors associated with said support rod for transmitting electrical signals to and from said transducer including a wire extending through said support rod in contact with a back surface of said transducer, and a metal conductor on the surface of said rod in contact with a front surface of said transducer.
Claim 6
Dependent Claim
100 words
For use in apparatus for cannulation of blood vessels, a stylet for positioning within a hollow needle and comprising a support rod, an ultrasound transducer at one end of said support rod for transmitting and receiving ultrasonic waves, means attaching said transducer to said support rod, and coaxial electrical conductors associated with said support rod for transmitting electrical signals to and from said transducer including a wire extending through said support rod in contact with a back surface of said transducer, and a metal conductor on the surface of said rod in contact with a front surface of said transducer.
Claim 7
Dependent Claim
20 words
Apparatus as defined by claim 4 wherein said transducer includes metal contacts on said front surface and said back surface.
Claim 8
Dependent Claim
21 words
The trocar as defined by claim 4 wherein said means attaching said transducer into said rod includes an ultrasound damping material.
References Cited (Backward Citations)
US3430625A
Cited
US3556079A
Cited
US3938502A
Cited
US4349032A
Cited
US4249539A
Cited
US4407294A
Cited
US4428379A
Cited
US4431006A
Cited
US4546771A
Cited
US4582067A
Cited
US4576177A
Cited
US4665925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-18 | 1993-06-19 | 1993-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-18 | 1997-06-19 | 1997-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-18 | 2001-06-19 | 2001-12-19 | $7700.00 | Window Closed / Lapsed |