US4920967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doppler tip wire guide
Assignee: Boston Scientific Scimed Inc
•
Filing: 1987-08-11
•
Granted: 1990-05-01
•
Expires: 2007-08-11
Abstract
Abstract An invasive, fluid velocity measuring wire guide particularly adapted and of a size (less than 0.030 inch) for subselective placement in the coronary arterial tree, which includes a Doppler mechanism for determining the blood flow velocity in the region of the distal end of the wire guide. Although the wire guide is particularly adapted for diagnosing coronary arterial disease subselectively; it is of such a size and manipulability to be useful in other blood flow and biological fluid flow analyses. Preferably, the wire guide is flexible and steerable for precise placement. The wire guide includes an elongated wire member having a Doppler crystal attached in longitudinal alignment at its distal end. Electrical leads extend from the Doppler crystal along the wire member to the appropriate test equipment for measuring the fluid flow velocity in the region of the Doppler crystal. Preferred embodiments of the Doppler means include piezoelectric crystals and piezoelectric polymers. Also disclosed is a guide wire with a laser Doppler means.
Inventors
- 👤 Cliff N. Cottonaro
- 👤 Scott M. Evans
- 👤 David R. Pflueger
- 👤 Huntly D. Millar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:23
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/06; A61B1/00; A61B1/005; A61B1/0051; A61B1/0055; A61B1/0056; A61B8/12; A61B8/44; A61B8/4444; A61B8/445; A61M; A61M25/00; A61M25/01; A61M25/09; A61M25/09016; A61M25/09033; A61M25/09041; A61M2025/09175; A61M25/0105; A61M25/0108
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A blood velocity measuring wire guide adapted for operative coupling to a catheter, the wire guide comprising: an elongated flexible support wire having distal and proximal ends which is generally longitudinally inelastic and flexible for threading engagement with the catheter; Doppler means consisting of a piezoelectric polymeric material mounted to the distal end of said wire for determining the velocity of the blood with the wire guide inserted in a blood vessel, said piezoelectric polymeric material oriented such that the ultrasonic signals are transmitted in a radial direction in relation to said elongated flexible support wire; and electrical lead means operatively mounted to the distal end of said Doppler means and coupled to said wire along its length.
Claim 2
Dependent Claim
118 words
A blood velocity measuring wire guide adapted for operative coupling to a catheter, the wire guide comprising: an elongated flexible support wire having distal and proximal ends which is generally longitudinally inelastic and flexible for threading engagement with the catheter; Doppler means consisting of a piezoelectric polymeric material mounted to the distal end of said wire for determining the velocity of the blood with the wire guide inserted in a blood vessel, said piezoelectric polymeric material oriented such that the ultrasonic signals are transmitted in a radial direction in relation to said elongated flexible support wire; and electrical lead means operatively mounted to the distal end of said Doppler means and coupled to said wire along its length.
Claim 3
Dependent Claim
107 words
A blood velocity measuring wire guide adapted for operative coupling to a catheter comprising: (a) an elongated insulated, helically coiled wire having a proximal portion and a distal portion forming a sheathing means, (b) Doppler means for transmitting a signal and for receiving a reflected signal said Doppler means comprising at least one light transmitting fiber capable of transmitting a signal and for receiving a reflected signal, said light transmitting fiber being encased by said sheathing means, said Doppler means being capable of determining the velocity of the blood with the wire guide inserted in a blood vessel by transmitting a signal and receiving a reflected signal.
Claim 4
Dependent Claim
107 words
A blood velocity measuring wire guide adapted for operative coupling to a catheter comprising: (a) an elongated insulated, helically coiled wire having a proximal portion and a distal portion forming a sheathing means, (b) Doppler means for transmitting a signal and for receiving a reflected signal said Doppler means comprising at least one light transmitting fiber capable of transmitting a signal and for receiving a reflected signal, said light transmitting fiber being encased by said sheathing means, said Doppler means being capable of determining the velocity of the blood with the wire guide inserted in a blood vessel by transmitting a signal and receiving a reflected signal.
Claim 5
Dependent Claim
21 words
The guide wire of claim 2 wherein said guide wire has a diameter ranging from about 0.010 to about 0.065 inches.
Claim 6
Dependent Claim
17 words
The guide wire of claim 3 wherein said guide wire has a diameter of about 0.014 inches.
Claim 7
Dependent Claim
20 words
The guide wire of claim 2 wherein said light transmitting fiber is adapted to transmit light from a laser source.
Claim 8
Dependent Claim
24 words
The guide wire of claim 5 wherein said laser source transmits light at a wavelength of from about 1 Kilohertz to about 100 Megahertz.
Claim 9
Dependent Claim
14 words
The guide wire of claim 5 wherein said laser source is a helium-neon laser.
Claim 10
Dependent Claim
16 words
The guide wire of claim 5 wherein said laser source is operated in the backscatter mode.
References Cited (Backward Citations)
US3547103A
Cited
US3452742A
Cited
US3521620A
Cited
FR2424733A1
Cited
US4534363A
Cited
US4545390A
Cited
US4576177A
Cited
US4587972A
Cited
US4589419A
Cited
US4794931A
Cited
US4771788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |