Patent US5154724A successfully refreshed from Google Patents.
US5154724A
Expired / Lapsed
US
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Atherectomy catheter
Assignee: Individual
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Filing: 1992-01-24
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Granted: 1992-10-13
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Expires: 2012-01-24
Abstract
Abstract An atherectomy catheter including an expandable cutter head having spaced apart blades radially extending from a cutter sleeve at a leading end of the cutter head. A torque tube is attached to and surrounds the blades at an expanding end of the cutter head opposite the leading end. An expander cable is attached to a bushing within the cutter head adjacent to the cutter sleeve and blades with the expander tube axially displaceable through the torque tube. A guidewire slidably extends through the bushing and expander tube. A guiding catheter substantially encloses the torque tube with the toruqe tube rotatable and axially displaceable within the guiding catheter, to rotate the cutter head as it engages a blockage in a blood vessel.
Inventors
- 👤 Winston A. Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:04
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320725; A61F; A61F2/00; A61F2/95; A61F2/958; A61B17/22; A61B2017/22038; A61B2017/22051; A61B2017/22054; A61B2017/22082; A61B2217/00; A61B2217/002; A61B2217/005; A61F2/82; A61F2/86; A61F2/90; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2210/00; A61F2210/0004; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0662; A61M2025/0681; A61M25/09; A61M2025/09175; A61M2025/09183; A61M25/10; A61M2025/1043; A61M2025/1052; A61M25/1011; A61M25/104
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
151 words
An atherectomy catheter comprising: a central guidewire; a cutter sleeve slidably and rotatably positioned around the guidewire; a variably expandable cutter having a plurality of substantially straight blades having front and back ends, with the front end of each blade attached to the cutter sleeve through a flexure; a torque tube around the guidewire having a leading end attached around and overlying the back ends of the blades, the cutter variably expandable from a closed position wherein the blades are generally straight and parallel to each other to an open position wherein the blades are generally straight and extend away from each other from their front ends to their back ends, the leading end of the torque tube having a diameter larger than any diameter traced by the blades as the cutter turns; and a pullback cable around the guidewire and within the torque tube and attached to the cutter sleeve.
Claim 2
Dependent Claim
151 words
An atherectomy catheter comprising: a central guidewire; a cutter sleeve slidably and rotatably positioned around the guidewire; a variably expandable cutter having a plurality of substantially straight blades having front and back ends, with the front end of each blade attached to the cutter sleeve through a flexure; a torque tube around the guidewire having a leading end attached around and overlying the back ends of the blades, the cutter variably expandable from a closed position wherein the blades are generally straight and parallel to each other to an open position wherein the blades are generally straight and extend away from each other from their front ends to their back ends, the leading end of the torque tube having a diameter larger than any diameter traced by the blades as the cutter turns; and a pullback cable around the guidewire and within the torque tube and attached to the cutter sleeve.
Claim 3
Dependent Claim
28 words
The atherectomy catheter of claim 1 further comprising a guiding catheter substantially enclosing the torque tube, with the torque tube rotatable and axially displaceable within the guiding catheter.
Claim 4
Dependent Claim
15 words
The atherectomy catheter of claim 2 further comprising vacuum means attached to the torque tube.
Claim 5
Dependent Claim
23 words
The atherectomy catheter of claim 1 further comprising a bio-active material covalently bonded to a surface on the torque tube adjacent the cutter.
Claim 6
Dependent Claim
16 words
The atherectomy catheter of claim 1 further comprising a hand controller connected to the pullback cable.
Claim 7
Dependent Claim
14 words
The atherectomy catheter of claim 5 wherein the hand controller comprises a ratchet device.
Claim 8
Dependent Claim
14 words
The atherectomy catheter of claim 1 further comprising a manipulator attached to the guidewire.
Claim 9
Dependent Claim
14 words
The atherectomy catheter of claim 1 further comprising means for rotating the torque tube.
Claim 10
Dependent Claim
55 words
The atherectomy catheter of claim 1 wherein the back ends of the blades are reversibly expandable radially outwardly from the cutter sleeve from a fully closed position wherein the blades are substantially parallel to each other to a fully open position wherein the blades form an angle with the guidewire of up to about 60°.
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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) | 1995-10-13 | 1996-04-13 | 1996-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-13 | 2000-04-13 | 2000-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-13 | 2004-04-13 | 2004-10-13 | $7700.00 | Window Closed / Lapsed |