Patent US6036708A successfully refreshed from Google Patents.
US6036708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting stent with flexible tissue extractor
Assignee: Abbott Cardiovascular Systems Inc
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Filing: 1998-08-13
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Granted: 2000-03-14
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Expires: 2018-08-13
Abstract
Abstract A catheter in accordance with my invention comprises a temporary self-expanding cutting stent and a retractable sheath for containing the self-expanding cutting stent. The catheter is positioned such that the self-expanding cutting stent is within a stenosis or other blockage within an artery. The retractable sheath is then retracted, and the self-expanding cutting stent expands, cutting through stenotic tissue, scar tissue, or other tissue blocking the artery. A second retractable structure, such as a coil, a ring, a screw or a second self-expanding cutting stent extends through the interior of the temporary self-expanding is cutting stent, and cuts any tissue extending through the struts of the temporary self-expanding cutting stent, and pulling that tissue to a location within the sheath. The sheath is then pushed back over the self-expanding cutting stent, and the catheter is then retracted.
Inventors
- 👤 Jason Van Sciver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:17
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320783; A61F; A61F2/00; A61F2/82
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
54 words
A catheter comprising: a self-expanding cutting stent; a retractable sheath for containing said self-expanding cutting stent, whereby when said retractable sheath is retracted relative to said self-expanding cutting stent, said self-expanding cutting stent expands to cut tissue; and means for pushing against any tissue extending through said self-expanding stent, to thereby cut said tissue.
Claim 2
Dependent Claim
54 words
A catheter comprising: a self-expanding cutting stent; a retractable sheath for containing said self-expanding cutting stent, whereby when said retractable sheath is retracted relative to said self-expanding cutting stent, said self-expanding cutting stent expands to cut tissue; and means for pushing against any tissue extending through said self-expanding stent, to thereby cut said tissue.
Claim 3
Dependent Claim
12 words
Structure of claim 1 wherein said means for pushing comprises a screw.
Claim 4
Dependent Claim
14 words
Structure of claim 1 wherein said means for pushing comprises a second self-expanding stent.
Claim 5
Dependent Claim
12 words
Structure of claim 1 wherein said means for pushing comprises a ring.
Claim 6
Dependent Claim
57 words
A catheter comprising: a self-expanding cutting stent; a retractable sheath for containing said self-expanding cutting stent, whereby when said retractable sheath is retracted relative to said self-expanding cutting stent, said self-expanding cutting stent expands to cut tissue; and a cutting tool which pushes against any tissue extending through said self-expanding cutting stent, to thereby cut said tissue.
Claim 7
Dependent Claim
57 words
A catheter comprising: a self-expanding cutting stent; a retractable sheath for containing said self-expanding cutting stent, whereby when said retractable sheath is retracted relative to said self-expanding cutting stent, said self-expanding cutting stent expands to cut tissue; and a cutting tool which pushes against any tissue extending through said self-expanding cutting stent, to thereby cut said tissue.
Claim 8
Independent Claim
80 words
A method for removing material from a patient's vascular system comprising the steps of: inserting a catheter into said patient, said catheter comprising an expandable stent at the distal end of said catheter covered by a retractable sheath; retracting said retractable sheath, thereby exposing said expandable stent and permitting said expandable stent to extend into said material; and withdrawing a member through the interior of said expandable stent to shear off any of said material extending through said expandable stent.
Claim 9
Independent Claim
80 words
A method for removing material from a patient's vascular system comprising the steps of: inserting a catheter into said patient, said catheter comprising an expandable stent at the distal end of said catheter covered by a retractable sheath; retracting said retractable sheath, thereby exposing said expandable stent and permitting said expandable stent to extend into said material; and withdrawing a member through the interior of said expandable stent to shear off any of said material extending through said expandable stent.
Claim 10
Dependent Claim
29 words
Method of claim 6 further comprising the steps of: pushing said retractable sheath over said expandable stent to collapse said expandable stent; and withdrawing said catheter from said patient.
Claim 11
Dependent Claim
74 words
A catheter comprising: a spring-action stent including a plurality of interconnected struts with open regions between adjacent struts, the struts having cutting edges; and a retractable sheath having a size and shape suitable for containing the springaction stent, the retractable sheath holding the spring-action stent in a coiled configuration when positioned over the spring-action stent, the retractable sheath being retractable from the spring-action stent to release the spring-action coil into an expanded recoil configuration.
Claim 12
Dependent Claim
74 words
A catheter comprising: a spring-action stent including a plurality of interconnected struts with open regions between adjacent struts, the struts having cutting edges; and a retractable sheath having a size and shape suitable for containing the springaction stent, the retractable sheath holding the spring-action stent in a coiled configuration when positioned over the spring-action stent, the retractable sheath being retractable from the spring-action stent to release the spring-action coil into an expanded recoil configuration.
Claim 13
Dependent Claim
65 words
A catheter according to claim 8 wherein: the spring-action stent is a tube with an interior lumen and the catheter further includes: a solid member having an outer surface conformably matched to the spring-action stent interior lumen inner surface, the solid member being moveable within the spring-action stent to shear tissue that extends through the spring-action stent open regions when the spring-action stent is recoiled.
Claim 14
Dependent Claim
13 words
A catheter according to claim 9 wherein: the solid member is a screw.
Claim 15
Dependent Claim
13 words
A catheter according to claim 9 wherein: the solid member is a coil.
Claim 16
Dependent Claim
13 words
A catheter according to claim 9 wherein: the solid member is a ring.
Claim 17
Dependent Claim
24 words
A catheter according to claim 8 wherein: the spring-action stent tube is machined at an angle so that the struts have sharp cutting edges.
Claim 18
Dependent Claim
26 words
A catheter according to claim 8 wherein: the spring-action stent tube is machined at approximately a 90° angle so that the struts have right angle edges.
Claim 19
Dependent Claim
28 words
A catheter according to claim 8 further comprising: a plurality of ridges formed on the spring-action stent tube and machined so that the struts have sharp cutting edges.
Claim 20
Dependent Claim
27 words
A catheter according to claim 8 further comprising: a shaft contained within the sheath; and a handle formed as a connection between the shaft and the sheath.
Claim 21
Independent Claim
128 words
A method of removing material from walls of a patient's body lumen comprising: inserting a catheter into the body lumen, the catheter including a spring-action stent and a retractable sheath, the spring-action stent including a plurality of interconnected struts with open regions between adjacent struts, the struts having cutting edges, the retractable sheath having a size and shape suitable for containing the spring-action stent, the retractable sheath holding the spring-action stent in a coiled configuration when positioned over the spring-action stent; retracting the retractable sheath from the spring-action stent thereby releasing the spring-action coil into an expanded recoil configuration so that the struts press into the material, forcing material into the open regions; and moving the material relative to the spring-action coil, shearing material in the open regions.
Claim 22
Independent Claim
128 words
A method of removing material from walls of a patient's body lumen comprising: inserting a catheter into the body lumen, the catheter including a spring-action stent and a retractable sheath, the spring-action stent including a plurality of interconnected struts with open regions between adjacent struts, the struts having cutting edges, the retractable sheath having a size and shape suitable for containing the spring-action stent, the retractable sheath holding the spring-action stent in a coiled configuration when positioned over the spring-action stent; retracting the retractable sheath from the spring-action stent thereby releasing the spring-action coil into an expanded recoil configuration so that the struts press into the material, forcing material into the open regions; and moving the material relative to the spring-action coil, shearing material in the open regions.
Claim 23
Dependent Claim
32 words
A method according to claim 17 wherein moving the material relative to the spring-action coil includes: moving the catheter relative to the body lumen to shear the material in the open regions.
Claim 24
Dependent Claim
56 words
A method according to claim 17 wherein moving the material relative to the spring-action coil includes: moving a solid member having an outer surface conformably matched to the spring-action stent interior lumen inner surface relative to the spring-action stent to shear tissue that extends through the spring-action stent open regions when the spring-action stent is recoiled.
Claim 25
Dependent Claim
46 words
A method according to claim 17 further comprising: advancing the retractable sheath back over the spring-action stent thereby collapsing the spring-action stent into the coiled configuration and containing the sheared material within the catheter; and removing the catheter and contained sheared material from the body lumen.
Claim 26
Dependent Claim
79 words
A catheter comprising: a spring-action cutting element including a plurality of interconnected struts with open regions between adjacent struts, the struts having cutting edges; and a retractable sheath having a size and shape suitable for containing the spring-action cutting element, the retractable sheath holding the spring-action cutting element in a coiled configuration when positioned over the spring-action cutting element, the retractable sheath being retractable from the spring-action cutting element to release the spring-action coil into an expanded recoil configuration.
Claim 27
Dependent Claim
79 words
A catheter comprising: a spring-action cutting element including a plurality of interconnected struts with open regions between adjacent struts, the struts having cutting edges; and a retractable sheath having a size and shape suitable for containing the spring-action cutting element, the retractable sheath holding the spring-action cutting element in a coiled configuration when positioned over the spring-action cutting element, the retractable sheath being retractable from the spring-action cutting element to release the spring-action coil into an expanded recoil configuration.
Claim 28
Dependent Claim
70 words
A catheter according to claim 21 wherein: the spring-action cutting element is a tube with an interior lumen and the catheter further includes: a solid member having an outer surface conformably matched to the spring-action cutting element interior lumen inner surface, the solid member being moveable within the spring-action cutting element to shear tissue that extends through the spring-action cutting element open regions when the spring-action cutting element is recoiled.
Claim 29
Independent Claim
134 words
A method of removing material from walls of a patient's body lumen comprising: inserting a catheter into the body lumen, the catheter including a spring-action cutting element and a retractable sheath, the spring-action cutting element including a plurality of interconnected struts with open regions between adjacent struts, the struts having cutting edges, the retractable sheath having a size and shape suitable for containing the spring-action cutting element, the retractable sheath holding the spring-action cutting element in a coiled configuration when positioned over the spring-action cutting element; retracting the retractable sheath from the spring-action cutting element thereby releasing the spring-action coil into an expanded recoil configuration so that the struts press into the material, forcing material into the open regions; and moving the material relative to the spring-action coil, shearing material in the open regions.
Claim 30
Independent Claim
134 words
A method of removing material from walls of a patient's body lumen comprising: inserting a catheter into the body lumen, the catheter including a spring-action cutting element and a retractable sheath, the spring-action cutting element including a plurality of interconnected struts with open regions between adjacent struts, the struts having cutting edges, the retractable sheath having a size and shape suitable for containing the spring-action cutting element, the retractable sheath holding the spring-action cutting element in a coiled configuration when positioned over the spring-action cutting element; retracting the retractable sheath from the spring-action cutting element thereby releasing the spring-action coil into an expanded recoil configuration so that the struts press into the material, forcing material into the open regions; and moving the material relative to the spring-action coil, shearing material in the open regions.
Claim 31
Dependent Claim
32 words
A method according to claim 23 wherein moving the material relative to the spring-action coil includes: moving the catheter relative to the body lumen to shear the material in the open regions.
Claim 32
Dependent Claim
60 words
A method according to claim 23 wherein moving the material relative to the spring-action coil includes: moving a solid member having an outer surface conformably matched to the spring-action cutting element interior lumen inner surface relative to the spring-action cutting element to shear tissue that extends through the spring-action cutting element open regions when the spring-action cutting element is recoiled.
Claim 33
Dependent Claim
48 words
A method according to claim 23 further comprising: advancing the retractable sheath back over the spring-action cutting element thereby collapsing the spring-action cutting element into the coiled configuration and containing the sheared material within the catheter; and removing the catheter and contained sheared material from the body lumen.
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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) | 2003-03-14 | 2003-09-13 | 2004-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-03-14 | 2007-09-13 | 2008-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-03-14 | 2011-09-13 | 2012-03-14 | $7700.00 | Window Closed / Lapsed |