US5916227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ablation devices and methods of use
Assignee: Boston Scientific Scimed Inc
•
Filing: 1997-07-11
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Granted: 1999-06-29
•
Expires: 2017-07-11
Abstract
Abstract According to the invention, a novelly improved ablation device includes releasably joinable drive and catheter assemblies. The drive assembly includes a tachometer assembly and a regulator for monitoring and controlling ablating burr speed. A bifurcated drive shaft includes a coiled distal portion and a tubular proximal portion for facilitating force transfer from the proximal portion to the distal portion. A dilating member is provided in addition to an ablating burr con the catheter assembly. The catheter tube may have multiple independent lumens having axes of elongation offset parallelly in the tube. Additionally, the ablating burr may be operatively connected to the catheter tube by drive gears or releasable threads. A radiopaque member is included on the distal end of the catheter tube, thereby rendering it visible to an observer. Novel, improved methods of ablating intravascular deposits are also provided.
Inventors
- 👤 Peter T. Keith
- 👤 Robert E. Atkinson
- 👤 Thomas V. Ressemann
- 👤 Hans Mische
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:31
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320758; A61B2017/0046; A61B2017/00473; A61B2017/00831; A61B2017/00902; A61B2017/320004; A61B2017/320766; A61B90/00; A61B90/08; A61B2090/0801; A61B2090/08021; Y; Y10; Y10S; Y10S604/00; Y10S604/905
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
118 words
An ablation device insertable intravascularly into a patient's vascular lumen, the vascular lumen having an interior surface, comprising: a. a catheter assembly having an axis of elongation and a distal end, wherein said distal end is insertable intravascularly into the patient's vascular lumen; b. an ablating burr located on said distal end of said catheter assembly; and c. an ablating shield for shielding a predetermined portion of said interior surface from said ablating burr, said ablating shield extending distally from said distal end of said catheter assembly and being positionable betwcen said ablating burr and said predetermined portion of said interior surface, wherein portions of said ablating shield adjacent said ablating burr are coated with a lubricous substance.
Claim 2
Dependent Claim
118 words
An ablation device insertable intravascularly into a patient's vascular lumen, the vascular lumen having an interior surface, comprising: a. a catheter assembly having an axis of elongation and a distal end, wherein said distal end is insertable intravascularly into the patient's vascular lumen; b. an ablating burr located on said distal end of said catheter assembly; and c. an ablating shield for shielding a predetermined portion of said interior surface from said ablating burr, said ablating shield extending distally from said distal end of said catheter assembly and being positionable betwcen said ablating burr and said predetermined portion of said interior surface, wherein portions of said ablating shield adjacent said ablating burr are coated with a lubricous substance.
Claim 3
Dependent Claim
37 words
An ablation device according to claim 1 wherein said ablating shield comprises an arcuate extension of said catheter assembly, said arcuate extension comprising less than a 360° portion of said catheter assembly about said axis of elongation.
Claim 4
Dependent Claim
61 words
An ablation device according to claim 2 wherein said arcuate extension is extended distally away from said distal end of said catheter assembly so that said ablating burr is longitudinally positioned between a distal end of said ablating shield and said distal end of said catheter assembly, said arcuate extension having a shape corresponding to said predetermined portion of said interior.
Claim 5
Dependent Claim
54 words
An ablation device according to claim 3 further comprising a guide wire lumen having a means of attachment to attach said guide wire lumen to an outer surface of said catheter assembly, said guide wire lumen being disposed along said ablating shield in a direction along said axis of elongation of said catheter assembly.
Claim 6
Dependent Claim
32 words
An ablation device according to claim 4 wherein said guide wire lumen extends from a location adjacent said distal end of said catheter assembly to said distal end of said ablation shield.
Claim 7
Dependent Claim
44 words
An ablation device according to claim 4 wherein said means of attachment is a ring, said guide wire lumen secured to said ring, said ring sized to fitably engage said outer surface of said catheter assembly to hold said guide wire lumen in place.
Claim 8
Dependent Claim
46 words
An ablation device according to claim 1 wherein said ablating shield extends distally from said distal end of said catheter assembly along said axis of elongation so that a distal end of said ablating shield is located distally of a predetermined location on said ablating burr.
Claim 9
Dependent Claim
19 words
An ablation device according to claim 7 wherein said predetermined location is a latitudinal midline of said ablating burr.
Claim 10
Dependent Claim
13 words
An ablation device according to claim 1 wherein said lubricous substance is polytetrafluoroethylene.
Claim 11
Dependent Claim
35 words
An ablation device according to claim 1 wherein portions of said ablating shield adjacent said ablating burr are subjected to a hard coating process so that said ablating burr does not ablate said ablating shield.
Claim 12
Dependent Claim
98 words
A catheter assembly for use with an ablation device, comprising: a. an elongate tube having an axis of elongation insertable intravascularly into a patient; b. an ablating burr for ablating an interior surface of a vascular lumen of said patient, said burr having a distal end; and c. an ablating shield connected to said tube extending distally from a distal end of said tube along said axis of elongation, said shield shielding a first portion of said ablating burr, and exposing a second side portion and at least a portion of said distal end of said ablating burr.
Claim 13
Dependent Claim
98 words
A catheter assembly for use with an ablation device, comprising: a. an elongate tube having an axis of elongation insertable intravascularly into a patient; b. an ablating burr for ablating an interior surface of a vascular lumen of said patient, said burr having a distal end; and c. an ablating shield connected to said tube extending distally from a distal end of said tube along said axis of elongation, said shield shielding a first portion of said ablating burr, and exposing a second side portion and at least a portion of said distal end of said ablating burr.
Claim 14
Dependent Claim
35 words
A catheter assembly according to claim 11 wherein said ablating shield comprises an arcuate extension of said tube, said arcuate extension comprising less than a 360° portion of said tube about said axis of elongation.
Claim 15
Dependent Claim
59 words
A catheter assembly according to claim 12 wherein said arcuate extension is extended distally away from said distal end of said tube so that said ablating burr is longitudinally positioned between a distal end of said ablating shield and said distal end of said tube, said arcuate extension having a shape corresponding to said portion of said interior surface.
Claim 16
Dependent Claim
54 words
A catheter assembly according to claim 13 further comprising a guide wire lumen having a means of attachment to attach said guide wire lumen to an outer surface of said catheter assembly, said guide wire lumen being disposed along said ablating shield in a direction along said axis of elongation of said catheter assembly.
Claim 17
Dependent Claim
32 words
A catheter assembly according to claim 13 wherein said guide wire lumen extends from a location adjacent said distal end of said catheter assembly to said distal end of said ablation shield.
Claim 18
Dependent Claim
44 words
A catheter assembly according to claim 13 wherein said means of attachment is a ring, said guide wire lumen secured to said ring, said ring sized to fitably engage said outer surface of said catheter assembly to hold said guide wire lumen in place.
Claim 19
Dependent Claim
46 words
A catheter assembly according to claim 11 wherein said ablating shield extends distally from said distal end of said catheter assembly along said axis of elongation so that a distal end of said ablating shield is located distally of a predetermined location on said ablating burr.
Claim 20
Dependent Claim
19 words
A catheter assembly according to claim 17 wherein said predetermined location is a latitudinal midline of said ablating burr.
Claim 21
Dependent Claim
34 words
A catheter assembly according to claim 17 wherein said ablating shield extends radially from said distal end of said catheter assembly a distance sufficient to offset said ablating shield radially from said ablating burr.
Claim 22
Dependent Claim
38 words
A catheter assembly according to claim 19 wherein portions of said ablating shield adjacent said ablating burr are coated with a lubricous substance so that said ablating shield does not interfere with said rotation of said ablating burr.
Claim 23
Dependent Claim
13 words
A catheter assembly according to claim 20 wherein said lubricous substance is polytetrafluoroethylene.
Claim 24
Dependent Claim
35 words
A catheter assembly according to claim 17 wherein portions of said ablating shield adjacent said ablating burr are subjected to a hard coating process so that said ablating burr does not ablate said ablating shield.
Claim 25
Independent Claim
83 words
An apparatus for shielding a predetermined portion of an interior surface of a patient's vascular lumen from an ablating burr located on a distal end of a catheter assembly, comprising; a. an ablating shield extending distally along an axis of elongation from said distal end of said catheter assembly, wherein portions of said ablating shield adjacent said ablating burr are coated with a lubricous substance, and said ablating shield being positionable between said ablating burr and said predetermined portion of said interior surface.
Claim 26
Independent Claim
83 words
An apparatus for shielding a predetermined portion of an interior surface of a patient's vascular lumen from an ablating burr located on a distal end of a catheter assembly, comprising; a. an ablating shield extending distally along an axis of elongation from said distal end of said catheter assembly, wherein portions of said ablating shield adjacent said ablating burr are coated with a lubricous substance, and said ablating shield being positionable between said ablating burr and said predetermined portion of said interior surface.
Claim 27
Dependent Claim
36 words
An apparatus according to claim 23 wherein said ablating shield comprises an arcuate extension of said catheter assembly, said arcuate extension comprising less than a 360° portion of said catheter assembly about said axis of elongation.
Claim 28
Dependent Claim
60 words
An apparatus according to claim 24 wherein said arcuate extension is extended distally away from said distal end of said catheter assembly so that said ablating burr is longitudinally positioned between a distal end of said ablating shield and said distal end of said catheter assembly, said arcuate extension having a shape corresponding to said predetermined portion of said interior.
Claim 29
Dependent Claim
53 words
An apparatus according to claim 25 further comprising a guide wire lumen having a means of attachment to attach said guide wire lumen to an outer surface of said catheter assembly, said guide wire lumen being disposed along said ablating shield in a direction along said axis of elongation of said catheter assembly.
Claim 30
Dependent Claim
31 words
An apparatus according to claim 26 wherein said guide wire lumen extends from a location adjacent said distal end of said catheter assembly to said distal end of said ablation shield.
Claim 31
Dependent Claim
43 words
An apparatus according to claim 26 wherein said means of attachment is a ring, said guide wire lumen secured to said ring, said ring sized to fitably engage said outer surface of said catheter assembly to hold said guide wire lumen in place.
Claim 32
Dependent Claim
45 words
An apparatus according to claim 23 wherein said ablating shield extends distally from said distal end of said catheter assembly along said axis of elongation so that a distal end of said ablating shield is located distally of a predetermined location on said ablating burr.
Claim 33
Dependent Claim
18 words
An apparatus according to claim 29 wherein said predetermined location is a latitudinal midline of said ablating burr.
Claim 34
Dependent Claim
34 words
An apparatus according to claim 29 wherein portions of said ablating shield adjacent said ablating burr are subjected to a hard coating process so that said ablating burr does not ablate said ablating shield.
Claim 35
Dependent Claim
12 words
An apparatus according to claim 23 wherein said lubricous substance is polytetrafluoroethylene.
Claim 36
Dependent Claim
111 words
An ablation device insertable intravascularly into a patient's vascular lumen, the vascular lumen having an interior surface, comprising: a. a catheter assembly having an axis of elongation and a distal end, wherein said distal end is insertable intravascularly into the patient's vascular lumen; b. an ablating burr located on said distal end of said catheter assembly, said catheter assembly shielding a predetermined portion of said interior surface from said ablating burr in a direction along said axis of elongation; and c. a guide wire lumen disposed toward one side of said catheter assembly, said guide wire lumen being disposed in a direction along said axis of elongation of said catheter assembly.
Claim 37
Dependent Claim
111 words
An ablation device insertable intravascularly into a patient's vascular lumen, the vascular lumen having an interior surface, comprising: a. a catheter assembly having an axis of elongation and a distal end, wherein said distal end is insertable intravascularly into the patient's vascular lumen; b. an ablating burr located on said distal end of said catheter assembly, said catheter assembly shielding a predetermined portion of said interior surface from said ablating burr in a direction along said axis of elongation; and c. a guide wire lumen disposed toward one side of said catheter assembly, said guide wire lumen being disposed in a direction along said axis of elongation of said catheter assembly.
Claim 38
Dependent Claim
33 words
An ablation device according to claim 33 wherein said guide wire lumen extends along the portion of the catheter assembly which shields said predetermined portion of said interior surface from said ablating burr.
Claim 39
Dependent Claim
38 words
An ablation device according to claim 34 wherein portions of said catheter assembly adjacent said ablating burr are coated with a lubricous substance so that said catheter assembly does not interfere with a rotation of said ablating burr.
Claim 40
Dependent Claim
13 words
An ablation device according to claim 35 wherein said lubricous substance is polytetrafluoroethylene.
Claim 41
Dependent Claim
35 words
An ablation device according to claim 34 wherein portions of said catheter assembly adjacent said ablating burr are subjected to a hard coating process so that said ablating burr does not ablate said catheter assembly.
Claim 42
Independent Claim
146 words
A method of ablating an intravascular deposit in a patient, the method comprising the steps of: a. providing an ablation device comprising a drive assembly releasably joinable to a catheter assembly, said catheter assembly having an ablating burr and an ablating shield; b. inserting said catheter assembly intravascularly into said patient; c. placing said ablating shield between a portion of an interior surface of said vascular lumen and the ablating burr, thereby shielding said portion from said ablating burr; d. joining said drive assembly to said catheter assembly; e. energizing said ablating burr to ablate said intravascular deposit; f. releasing the drive assembly from the catheter assembly and removing the catheter assembly from the patient; g. inserting a second catheter assembly intravascularly into said patient; h. joining the drive assembly to the second catheter assembly; and i. energizing said ablating burr to ablate said intravascular deposit.
Claim 43
Independent Claim
146 words
A method of ablating an intravascular deposit in a patient, the method comprising the steps of: a. providing an ablation device comprising a drive assembly releasably joinable to a catheter assembly, said catheter assembly having an ablating burr and an ablating shield; b. inserting said catheter assembly intravascularly into said patient; c. placing said ablating shield between a portion of an interior surface of said vascular lumen and the ablating burr, thereby shielding said portion from said ablating burr; d. joining said drive assembly to said catheter assembly; e. energizing said ablating burr to ablate said intravascular deposit; f. releasing the drive assembly from the catheter assembly and removing the catheter assembly from the patient; g. inserting a second catheter assembly intravascularly into said patient; h. joining the drive assembly to the second catheter assembly; and i. energizing said ablating burr to ablate said intravascular deposit.
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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) | 2002-06-28 | 2002-12-28 | 2003-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-06-28 | 2006-12-28 | 2007-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-06-28 | 2010-12-28 | 2011-06-29 | $7700.00 | Window Closed / Lapsed |