US6818001B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intralumenal material removal systems and methods
Assignee: Boston Scientific Corp
•
Filing: 2001-04-04
•
Granted: 2004-11-16
•
Expires: 2021-04-04
Abstract
Abstract The intralumenal material removal system includes a cutter assembly positionable in the lumen of a mammalian subject and operably connected to system controls. The cutter assembly is axially advanceable by translating the drive shaft and rotatable by rotating the drive shaft. One cutter assembly comprises an adjustable cutter that is adjustable between a smaller diameter condition and a larger diameter condition by rotation of the drive shaft in opposite directions. The cutter may thus be introduced to and withdrawn from the material removal site in a retracted, smaller diameter condition that facilitates translation and navigation of the device through various lumens. The adjustable cutting assembly may be selectively expanded at the material removal site to facilitate cutting, removal and aspiration of the occlusive material. One composite cutter assembly comprises both a distal, fixed diameter cutter and a proximal adjustable diameter cutter.
Inventors
- 👤 Edward I. Wulfman
- 👤 Thomas J. Clement
- 👤 Craig E. Lawson
- 👤 David C. Auth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:47
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320758; A61B17/320725
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
92 words
An intralumenal material removal device comprising a rotatable cutter assembly in communication with a drive shaft for receiving rotational torque from the drive shaft, the cutter assembly comprising an adjustable diameter cutter having a plurality of rotatable, fan-shaped cutting blades, wherein each of the cutting blades has a beveled edge for cutting, and wherein each of the cutting blades is individually rotatable around its own axis of rotation between a smaller diameter tangential orientation and a larger diameter radial orientation, and wherein each axis is circumferentially spaced around a central longitudinal axis.
Claim 2
Dependent Claim
92 words
An intralumenal material removal device comprising a rotatable cutter assembly in communication with a drive shaft for receiving rotational torque from the drive shaft, the cutter assembly comprising an adjustable diameter cutter having a plurality of rotatable, fan-shaped cutting blades, wherein each of the cutting blades has a beveled edge for cutting, and wherein each of the cutting blades is individually rotatable around its own axis of rotation between a smaller diameter tangential orientation and a larger diameter radial orientation, and wherein each axis is circumferentially spaced around a central longitudinal axis.
Claim 3
Dependent Claim
49 words
The device of claim 1 , wherein the adjustable diameter cutter has a plurality of material removal ports in communication with a lumen, wherein the material removal ports are located between the cutting blades and the material removal ports permit flow through when the adjustable diameter cutter is expanded.
Claim 4
Dependent Claim
23 words
The device of claim 1 , wherein the cutter assembly further comprises a fixed diameter cutter having a plurality of fixed cutting blades.
Claim 5
Dependent Claim
26 words
The device of claim 3 , wherein the cutting blades of the fixed diameter cutter have beveled edges and operate using the principle of differential cutting.
Claim 6
Dependent Claim
28 words
The device of claim 1 , further including a plurality of stop faces that contact the cutting blades when the cutting blades are in a smaller diameter condition.
Claim 7
Dependent Claim
28 words
The device of claim 1 , further including a plurality of support faces that contact the cutting blades when the cutting blades are in a larger diameter condition.
Claim 8
Dependent Claim
19 words
The device of claim 3 , wherein the fixed diameter cutter is positioned distally from the adjustable diameter cutter.
Claim 9
Dependent Claim
23 words
The device of claim 7 , wherein the fixed diameter cutter has a frusto-conical cross-sectional configuration and a series of raised cutting flutes.
Claim 10
Dependent Claim
26 words
The device of claim 1 , wherein the blades are rotatable between the tangential and radial orientations by changing direction of rotation of the cutter assembly.
Claim 11
Dependent Claim
55 words
An intralumenal material removal device comprising: a rotatable cutter assembly operably coupled to a distal end of a rotatable drive shaft, the cutter assembly comprising an expandable diameter cutter having a plurality of blades, each of the blades mounted for pivoting between a tangential orientation and a radial orientation without causing the blades to flex.
Claim 12
Dependent Claim
55 words
An intralumenal material removal device comprising: a rotatable cutter assembly operably coupled to a distal end of a rotatable drive shaft, the cutter assembly comprising an expandable diameter cutter having a plurality of blades, each of the blades mounted for pivoting between a tangential orientation and a radial orientation without causing the blades to flex.
Claim 13
Dependent Claim
22 words
The device of claim 10 , wherein the cutting blades of the expandable diameter cutter operate using the principle of differential cutting.
Claim 14
Dependent Claim
48 words
The device of claim 10 , wherein the expandable diameter cutter has a plurality of material removal ports in communication with a lumen, wherein the material removal ports are located between the cutting blades and permit flow through when the cutting blades are positioned in a radial orientation.
Claim 15
Dependent Claim
28 words
The device of claim 10 , further including a plurality of stop faces that contact the cutting blades when the cutting blades are positioned in a radial orientation.
Claim 16
Dependent Claim
27 words
The device of claim 13 , further including a plurality of support faces that contact the cutting blades when the cutting blades are in a retracted position.
Claim 17
Dependent Claim
23 words
The device of claim 1 or 10 , additionally comprising a temperature sensor mounted on or in proximity to the rotatable cutter assembly.
Claim 18
Dependent Claim
18 words
The device of claim 1 or 10 , wherein the drive shaft is a non-compressible multi-filar metallic coil.
Claim 19
Dependent Claim
35 words
The device of claim 1 or 10 , additionally comprising a magnetic coupler assembly mounted to the drive shaft at its proximal end to provide detachable coupling of the drive shaft to a drive train.
Claim 20
Dependent Claim
30 words
The device of claim 1 or 10 , wherein the drive shaft comprises a helical coil having a polymer layer sealing an outer and/or inner surface of the drive shaft.
Claim 21
Dependent Claim
13 words
The device of claim 18 , wherein the polymer layer comprises polytetrafluoroethylene (PFTE).
Claim 22
Dependent Claim
19 words
The device of claim 1 or 10 , wherein the cutting blades are arranged in a radially symmetrical configuration.
Claim 23
Dependent Claim
45 words
The device of claim 1 or 10 , additionally comprising a bearing assembly coupling the cutter assembly to a conduit catheter, whereby the cutter assembly rotates freely around a central axis and a fluid-tight junction is formed between the conduit catheter and the cutter assembly.
Claim 24
Dependent Claim
28 words
The device of claim 1 or 10 , wherein the cutting blades are constructed from a material selected from the group consisting of: metals, metal alloys and ceramics.
Claim 25
Dependent Claim
40 words
The device of claim 1 or 10 , wherein the cutting blades are constructed from a material selected from the group consisting of: series 300 vanadium steel; series 400 vanadium steel; nickel-titanium; titanium; titanium-containing metals; oxide ceramics; and combinations thereof.
Claim 26
Dependent Claim
14 words
The device of claim 1 or 11 , wherein the beveled edges are sharpened.
Claim 27
Dependent Claim
26 words
The device of claim 1 or 10 , wherein the cutting blades comprise blade sections mounted on rods that are pivotably seated on a central block.
Claim 28
Dependent Claim
16 words
The device of claim 1 or 10 , wherein the cutter assembly has a central lumen.
Claim 29
Dependent Claim
18 words
The device of claim 26 , additionally comprising a plurality of circumferentially interspaced ports communicating with the 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) | 2007-11-16 | 2008-05-17 | 2008-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-11-16 | 2012-05-17 | 2012-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-11-16 | 2016-05-17 | 2016-11-16 | $7700.00 | Window Closed / Lapsed |