US6451037B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable atherectomy burr with metal reinforcement
Assignee: Boston Scientific Scimed Inc
•
Filing: 2000-11-22
•
Granted: 2002-09-17
•
Expires: 2020-11-22
Abstract
Abstract An atherectomy burr having an operating diameter that is larger than the diameter of a catheter in which the burr is routed. The burr may include a flexible polymeric tube that is plated with an abrasive and that expands when the burr is rotated. Metal fibers are embedded into burr to improve strength and to control the maximum expansion diameter of the burr. The abrasive is plated on the burr by first selectively exposing the underlying metal. The exposed metal is then plated with a layer of metal such as nickel having a slurry of diamond particles disposed therein using an electro and/or electroless plating method. When the burr is rotated, the polymeric tube expands by centrifugal force to ablate a new lumen in the patient's vessel.
Inventors
- 👤 Verivada Chandrasekaran
- 👤 Thomas J. Hiblar
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; A61B17/320725; A61B2017/320004
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
132 words
An atherectomy device for ablating an occlusion in a patient's blood vessel, comprising: a drive shaft; an ablation burr having a proximal end and a distal end secured to the drive shaft, the ablation burr including: a polymeric tube extending from the proximal end of the ablation burr to the distal end of the ablation burr, the polymeric tube having an unexpanded state with a first diameter and an expanded state with a second larger diameter; metal fibers affixed to the polymeric tube and operable to reinforce the polymeric tube; and an abrasive coating disposed on at least a portion of the exterior surface of the ablation burr to ablate an occlusion in a patient's vessel; and a lumen extending through the drive shaft and ablation burr for receiving a guide wire.
Claim 2
Dependent Claim
132 words
An atherectomy device for ablating an occlusion in a patient's blood vessel, comprising: a drive shaft; an ablation burr having a proximal end and a distal end secured to the drive shaft, the ablation burr including: a polymeric tube extending from the proximal end of the ablation burr to the distal end of the ablation burr, the polymeric tube having an unexpanded state with a first diameter and an expanded state with a second larger diameter; metal fibers affixed to the polymeric tube and operable to reinforce the polymeric tube; and an abrasive coating disposed on at least a portion of the exterior surface of the ablation burr to ablate an occlusion in a patient's vessel; and a lumen extending through the drive shaft and ablation burr for receiving a guide wire.
Claim 3
Dependent Claim
17 words
The atherectomy device of claim 1 , wherein the metal fiber is embedded in the polymeric tube.
Claim 4
Dependent Claim
15 words
The atherectomy device of claim 2 , wherein the metal fiber has a cross-ply configuration.
Claim 5
Dependent Claim
15 words
The atherectomy device of claim 2 , wherein the metal fiber has a unidirectional configuration.
Claim 6
Dependent Claim
15 words
The atherectomy device of claim 2 , wherein the metal fiber has a spiral configuration.
Claim 7
Dependent Claim
15 words
The atherectomy device of claim 2 , wherein the metal fiber has a random configuration.
Claim 8
Dependent Claim
24 words
The atherectomy device of claim 2 , wherein the metal fiber determines the second larger diameter of the burr by restricting the expansion thereof.
Claim 9
Dependent Claim
17 words
The atherectomy device of claim 2 , wherein the metal fiber prevents over expansion of the tube.
Claim 10
Dependent Claim
17 words
The atherectomy device of claim 2 , wherein the metal fiber controls the expansion of the tube.
Claim 11
Dependent Claim
20 words
The atherectomy device of claim 2 , wherein a portion of the tube is removed to expose the metal fiber.
Claim 12
Dependent Claim
17 words
The atherectomy device of claim 10 , wherein the abrasive is disposed on the exposed metal fiber.
Claim 13
Dependent Claim
16 words
The atherectomy device of claim 1 , wherein the abrasive is disposed on the metal fiber.
Claim 14
Dependent Claim
18 words
The atherectomy device of claim 1 , wherein the polymeric tube is made of a stretchable plastic material.
Claim 15
Dependent Claim
21 words
The atherectomy device of claim 1 , wherein the polymeric tube assumes the expanded state when rotated by the drive shaft.
Claim 16
Dependent Claim
88 words
An atherectomy device for ablating an occlusion in a patient's blood vessel, comprising: a drive shaft; an ablation burr secured to the drive shaft, the burr including a nose section having a fixed maximum diameter, a polymeric section having metal fibers, and an abrasive disposed on at least a portion the burr, the polymeric section having a diameter that increases as a result of the burr being rotated by the drive shaft; and a lumen extending through the drive shaft and ablation burr for receiving a guide wire.
Claim 17
Dependent Claim
88 words
An atherectomy device for ablating an occlusion in a patient's blood vessel, comprising: a drive shaft; an ablation burr secured to the drive shaft, the burr including a nose section having a fixed maximum diameter, a polymeric section having metal fibers, and an abrasive disposed on at least a portion the burr, the polymeric section having a diameter that increases as a result of the burr being rotated by the drive shaft; and a lumen extending through the drive shaft and ablation burr for receiving a guide wire.
Claim 18
Dependent Claim
47 words
The atherectomy device of claim 15 , wherein the nose section further comprises a stepped section of a substantially constant diameter that is smaller than the maximum diameter of the nose section, and wherein the polymeric section comprises a polymeric tube section engaged over the stepped section.
Claim 19
Dependent Claim
17 words
The atherectomy device of claim 15 , wherein the metal fibers are embedded within the polymeric section.
Claim 20
Dependent Claim
29 words
The atherectomy device of claim 17 , wherein a portion of the polymeric tube is removed to expose the metal fiber, the abrasive being disposed on the metal fibers.
Claim 21
Dependent Claim
17 words
The atherectomy device of claim 15 , wherein the metal fibers restrict the expansion of the burr.
Claim 22
Dependent Claim
100 words
An atherectomy device for ablating an occlusion in a patient's blood vessel, comprising: a drive shaft; an ablation burr secured to the drive shaft, the burr including: a nose section having a fixed maximum diameter; and a polymeric section having embedded metal fibers operable to reinforce the polymeric tube, the outer surface of the embedded metal fibers having a cutting surface thereon; wherein the polymeric section has an unexpanded state with a first diameter and an expanded state with a second larger diameter; and a lumen extending through the drive shaft and the ablation burr for receiving a guide wire.
Claim 23
Dependent Claim
100 words
An atherectomy device for ablating an occlusion in a patient's blood vessel, comprising: a drive shaft; an ablation burr secured to the drive shaft, the burr including: a nose section having a fixed maximum diameter; and a polymeric section having embedded metal fibers operable to reinforce the polymeric tube, the outer surface of the embedded metal fibers having a cutting surface thereon; wherein the polymeric section has an unexpanded state with a first diameter and an expanded state with a second larger diameter; and a lumen extending through the drive shaft and the ablation burr for receiving a guide wire.
Claim 24
Dependent Claim
15 words
The atherectomy device of claim 20 , wherein the cutting surface is an abrasive coating.
Claim 25
Dependent Claim
33 words
The atherectomy device of claim 20 , wherein the embedded metal fibers control the expansion of the polymeric section from the unexpanded state to the expanded state, and determines the second larger diameter.
Claim 26
Independent Claim
62 words
A method of plating an ablation burr with an abrasive, the ablation burr having a polymeric tube section with metal fiber embedded therein, the method comprising: providing the abrasive; removing a portion of the tube section of the ablation burr that overlays the embedded metal fiber to expose the embedded metal fiber; and plating the exposed embedded metal fiber with the abrasive.
Claim 27
Independent Claim
62 words
A method of plating an ablation burr with an abrasive, the ablation burr having a polymeric tube section with metal fiber embedded therein, the method comprising: providing the abrasive; removing a portion of the tube section of the ablation burr that overlays the embedded metal fiber to expose the embedded metal fiber; and plating the exposed embedded metal fiber with the abrasive.
References Cited (Backward Citations)
DE867144C
Cited
US2701559A
Cited
US3614953A
Cited
US3896815A
Cited
US4273128A
Cited
EP0086048A2
Cited
US4465072A
Cited
US4589412A
Cited
US4631052A
Cited
US4685458A
Cited
US4842579A
Cited
US5653696A
Cited
US4842579B1
Cited
US4926858A
Cited
US4781186A
Cited
US4653496A
Cited
EP0204218A1
Cited
US4706670A
Cited
US4990134B1
Cited
US4990134A
Cited
USRE33569E
Cited
US4794931A
Cited
US4728319A
Cited
US4696667A
Cited
US4898574A
Cited
US4765332A
Cited
US4747821A
Cited
US4857045A
Cited
US4784636A
Cited
US4794928A
Cited
US4886061A
Cited
US4950238A
Cited
US5152773A
Cited
US5749914A
Cited
US4966604A
Cited
US5342307A
Cited
US5100425A
Cited
US5030201A
Cited
US5154724A
Cited
US5395311A
Cited
US5569276A
Cited
US5376100A
Cited
US5224945A
Cited
US5192291A
Cited
US5250060A
Cited
US5571086A
Cited
US5490859A
Cited
US5318576A
Cited
US5385311A
Cited
US5725543A
Cited
US5842479A
Cited
US5456666A
Cited
US5649941A
Cited
US5725568A
Cited
US5681336A
Cited
US5556405A
Cited
US5766192A
Cited
US6156046A
Cited
US6096054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-09-16 | 2006-03-18 | 2006-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-16 | 2010-03-18 | 2010-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-16 | 2014-03-18 | 2014-09-17 | $7700.00 | Window Closed / Lapsed |