US5226909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Atherectomy device having helical blade and blade guide
Assignee: Abbott Cardiovascular Systems Inc
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Filing: 1992-11-04
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Granted: 1993-07-13
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Expires: 2012-11-04
Abstract
Abstract An atherectomy catheter includes a catheter body having a cylindrical housing at its distal end. The cylindrical housing includes an elongate cutting aperture on one side thereof and a mechanism for severing atheroma which enters within the opening. In a first embodiment, the cutting mechanism comprises a circular cutting blade which is advanced over an elongate guide member which defines a path for the blade. Use of the guide means helps assure that the cutting blade will not be lost from the housing during use. In a second embodiment, a rotatable helical cutting blade is mounted within the housing. In that particular embodiment, the helical cutting blade can serve as the guide member for the circular cutting blade.
Inventors
- 👤 Michael Evans
- 👤 Richard L. Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:58
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320783; A61B17/320758; A61B2017/00681; A61B2017/00685; A61B17/22; A61B2017/22051; A61B2017/22054; A61B2017/320052
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
106 words
An atherectomy catheter comprising: a flexible catheter body having a lumen extending between proximal and distal ends thereof; a cylindrical housing secured to the distal end of the flexible catheter body, said housing having a substantially open interior and a single axially aligned, continuous elongated aperture on one side thereof; an inflatable balloon disposed on a side of the cylindrical housing opposite to the elongate aperture; a first helical cutting blade comprising a helically wound ribbon having a plurality of turns and an axially disposed sharpened edge disposed and contained within the housing adjacent the elongate aperture; and means for rotating the first helical cutting blade.
Claim 2
Dependent Claim
106 words
An atherectomy catheter comprising: a flexible catheter body having a lumen extending between proximal and distal ends thereof; a cylindrical housing secured to the distal end of the flexible catheter body, said housing having a substantially open interior and a single axially aligned, continuous elongated aperture on one side thereof; an inflatable balloon disposed on a side of the cylindrical housing opposite to the elongate aperture; a first helical cutting blade comprising a helically wound ribbon having a plurality of turns and an axially disposed sharpened edge disposed and contained within the housing adjacent the elongate aperture; and means for rotating the first helical cutting blade.
Claim 3
Dependent Claim
106 words
An atherectomy catheter comprising: a flexible catheter body having a lumen extending between proximal and distal ends thereof; a cylindrical housing secured to the distal end of the flexible catheter body, said housing having a substantially open interior and an axially aligned, continuous elongated aperture on one side thereof; a first helical cutting blade comprising a helically wound ribbon having a plurality of turns and an axially disposed sharpened edge disposed and contained within the housing adjacent the elongate aperture; and means for rotating the first helical cutting blade; and at least one sharpened blade extending generally axially between successive turns of the helical cutting blade.
Claim 4
Dependent Claim
106 words
An atherectomy catheter comprising: a flexible catheter body having a lumen extending between proximal and distal ends thereof; a cylindrical housing secured to the distal end of the flexible catheter body, said housing having a substantially open interior and an axially aligned, continuous elongated aperture on one side thereof; a first helical cutting blade comprising a helically wound ribbon having a plurality of turns and an axially disposed sharpened edge disposed and contained within the housing adjacent the elongate aperture; and means for rotating the first helical cutting blade; and at least one sharpened blade extending generally axially between successive turns of the helical cutting blade.
Claim 5
Dependent Claim
114 words
An atherectomy catheter comprising: a catheter body having a lumen extending between proximal and distal ends thereof; a cylindrical housing secured to the distal end of the catheter body, said housing having a substantially open interior and an axially-aligned, elongate aperture on one side thereof; a first helical cutting blade disposed within the housing adjacent the elongate aperture; means for rotating the first helical cutting blade; a second helical cutting blade disposed within the housing concentrically within the first helical cutting blade, said first and second helical cutting blades having the opposite pitch; and means for rotating the second helical cutting blade in a direction opposite to that of the first helical cutting blade.
Claim 6
Dependent Claim
114 words
An atherectomy catheter comprising: a catheter body having a lumen extending between proximal and distal ends thereof; a cylindrical housing secured to the distal end of the catheter body, said housing having a substantially open interior and an axially-aligned, elongate aperture on one side thereof; a first helical cutting blade disposed within the housing adjacent the elongate aperture; means for rotating the first helical cutting blade; a second helical cutting blade disposed within the housing concentrically within the first helical cutting blade, said first and second helical cutting blades having the opposite pitch; and means for rotating the second helical cutting blade in a direction opposite to that of the first helical cutting blade.
Claim 7
Dependent Claim
79 words
An atherectomy catheter comprising: a catheter body having a lumen extending between proximal and distal ends thereof; a cylindrical housing secured to the distal end of the catheter body, said housing having a substantially open interior and an axially-aligned, elongate aperture on one side thereof; a first helical cutting blade disposed within the housing adjacent the elongate aperture; means for rotating the first helical cutting blade; and means for axially translating the first helical cutting blade within the housing.
Claim 8
Dependent Claim
79 words
An atherectomy catheter comprising: a catheter body having a lumen extending between proximal and distal ends thereof; a cylindrical housing secured to the distal end of the catheter body, said housing having a substantially open interior and an axially-aligned, elongate aperture on one side thereof; a first helical cutting blade disposed within the housing adjacent the elongate aperture; means for rotating the first helical cutting blade; and means for axially translating the first helical cutting blade within the housing.
Claim 9
Dependent Claim
19 words
An atherectomy catheter as in claim 4, further comprising a circular cutting blade attached to the helical cutting blade.
Claim 10
Dependent Claim
17 words
An atherectomy catheter as in claim 5, wherein the circular cutting blade has an oblique cutting edge.
Claim 11
Independent Claim
59 words
A method for severing atheroma within a blood vessel, said method comprising: positioning a housing within the blood vessel proximate the atheroma; and rotating a helical cutting blade within but not beyond the housing, said cutting blade being exposed to the atheroma through an opening in a side of the housing, whereby atheroma is severed by the helical blade.
Claim 12
Independent Claim
59 words
A method for severing atheroma within a blood vessel, said method comprising: positioning a housing within the blood vessel proximate the atheroma; and rotating a helical cutting blade within but not beyond the housing, said cutting blade being exposed to the atheroma through an opening in a side of the housing, whereby atheroma is severed by the helical blade.
Claim 13
Dependent Claim
22 words
A method as in claim 7, further comprising tamping the severed atheroma within the helical blade to one end of the housing.
Claim 14
Dependent Claim
29 words
A method as in claim 7, further comprising urging the opening of the housing against the atheroma to envelope at least a portion of the atheroma within the housing.
Claim 15
Dependent Claim
30 words
A method as in claim 9, wherein the housing is urged by inflating a balloon which is disposed on the housing on a side opposite to that of the opening.
Claim 16
Dependent Claim
33 words
A method as in claim 10, wherein the inflation pressure in the balloon and the speed of rotation of the helical blade are controlled simultaneously to maintain a desired rate of severing atheroma.
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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) | 1996-07-12 | 1997-01-11 | 1997-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-12 | 2001-01-11 | 2001-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-12 | 2005-01-11 | 2005-07-13 | $7700.00 | Window Closed / Lapsed |