US5326342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic angioplasty device incorporating all ultrasound transmission member made at least partially from a superlastic metal alloy
Assignee: Abbott Cardiovascular Systems Inc
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Filing: 1992-07-08
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Granted: 1994-07-05
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Expires: 2012-07-08
Abstract
Abstract An ultrasonic angioplasty device comprising an elongate ultrasound transmission member having a proximal end attachable to an ultrasound generating device and a bulbous distal head or probe formed on the distal end thereof for effecting ablative treatment of an occluding lesion. The ultrasound transmission member may be formed of one or more superelastic metal alloys such as NiTi (50 at. % Ni). A guidewire lumen may be formed in the distal head or probe to permit passage of a guidewire therethrough. Portions of the ultrasound transmission member may be curved or bent. Portions of the ultrasound transmission member may be tapered or narrowed. One or more surface disruptions may be formed on the distal head or probe to improve treatment efficacy. An increased hardness coating or outer skin may be formed on the ultrasound transmission member. The device of the present invention may be incorporated into an angioscopic device.
Inventors
- 👤 Russell Pflueger
- 👤 Henry Nita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/22; A61B17/22004; A61B17/22012; A61B18/00; A61B18/04; A61B18/12; A61B18/1206; A61B2017/00017; A61B2017/00115; A61B2017/00119; A61B2017/00137; A61B2017/00141; A61B2017/00146; A61B2017/00831; A61B2017/0084; A61B2017/00849; A61B2017/00973; A61B2017/22014; A61B2017/22015; A61B2017/22018; A61B2017/22038; A61B2017/22039; A61B2017/22041; A61B17/32; A61B17/320068; A61B2017/320072; A61B2017/320073; A61B2017/320088; A61B2018/00005; A61B2018/00011; A61B2217/00; A61B2217/002; A61B2217/007; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30092; A61F2210/00; A61F2210/0014; A61F2210/0023; A61F2210/0042; A61M; A61M25/00; A61M25/01; A61M2025/0183
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
An ultrasound transmitting catheter device for transmitting ultrasonic energy from an extrocorporeal ultrasound generating apparatus to a location within a mammalian body, said catheter device comprising: an elongate flexible catheter having a proximal end, a distal end and at last one lumen extending longitudinally therethrough; and an ultrasound transmission member formed of a superelastic metal alloy and having a proximal end which is connectable to an ultrasound source and a distal end which is substantially coterminous with the distal end of said catheter body; and said ultrasound transmission member extending longitudinally through said flexible catheter such that, when said flexible catheter is placed in a bent configuration, said ultrasound transmission member will concomitantly assume a bent configuration.
Claim 2
Dependent Claim
117 words
An ultrasound transmitting catheter device for transmitting ultrasonic energy from an extrocorporeal ultrasound generating apparatus to a location within a mammalian body, said catheter device comprising: an elongate flexible catheter having a proximal end, a distal end and at last one lumen extending longitudinally therethrough; and an ultrasound transmission member formed of a superelastic metal alloy and having a proximal end which is connectable to an ultrasound source and a distal end which is substantially coterminous with the distal end of said catheter body; and said ultrasound transmission member extending longitudinally through said flexible catheter such that, when said flexible catheter is placed in a bent configuration, said ultrasound transmission member will concomitantly assume a bent configuration.
Claim 3
Dependent Claim
15 words
The device of claim 1 wherein said ultrasound transmission member is formed of nickel-titanium alloy.
Claim 4
Dependent Claim
24 words
The device of claim 1 wherein said ultrasound transmission member is formed of nickel-titanium alloy having a nickel content of approximately 50.8 atomic percent.
Claim 5
Dependent Claim
61 words
The device of claim 1 further comprising: at least one coolant inlet port located near the proximal end of the catheter for infusion of a coolant liquid into the lumen of the catheter; and at least one coolant outlet aperture formed near the distal end of said catheter to allow coolant liquid to flow out of the lumen of said catheter.
Claim 6
Dependent Claim
22 words
The device of claim 1 wherein said ultrasound transmission member is held in a substantially fixed longitudinal position relative to said catheter.
Claim 7
Dependent Claim
25 words
The device of claim 1 wherein said superelastic metal alloy is a metal alloy which exhibits superelastic properties at temperature below its martensite transition temperature.
Claim 8
Dependent Claim
57 words
The device of claim 4 wherein said superelastic metal alloy exhibits superelastic properties at temperatures below its martensite transition temperature and wherein said coolant inlet and outlet aperture are sized and configured to permit sufficient coolant flow through said catheter to maintain said superelastic ultrasound transmission member at a temperature below its martensite transition temperature during use.
References Cited (Backward Citations)
US3565062A
Cited
US3823717A
Cited
US4188952A
Cited
US4665906A
Cited
US4692139A
Cited
WO1987005793A1
Cited
US4808153A
Cited
US4870953A
Cited
US4924863A
Cited
WO1990001300A1
Cited
US4936281A
Cited
US5076276A
Cited
US5100423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-04 | 1998-01-03 | 1998-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-04 | 2002-01-03 | 2002-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-04 | 2006-01-03 | 2006-07-05 | $7700.00 | Window Closed / Lapsed |