EP0426322A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fiber tip atherectomy catheter
Assignee: Schneider USA Inc
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Filing: 1990-10-16
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Granted: —
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Expires: 2010-10-16
Abstract
Abstract A catheter assembly (10) especially designed for the performance of atherectomy procedures which includes an elongated flexible plastic tube (12) which can be routed through the vascular system to the location of the atheroma to be removed and a working catheter (16) insertable through the guide catheter (12) in the form of an elongated flexible plastic tube (16) having a series of fibers (23) integrally formed with or otherwise attached to the distal end portion of the working catheter (16) and normally laying flat against the wall of the catheter (16). The proximal end of the working catheter (16) is adapted for connection to a high speed motor whereby the working catheter (16) can be rotated relative to the surrounding guide catheter (12). As the distal end portion of the working catheter (16) is advanced distally beyond the end of the guide catheter (12), centrifugal force acts upon the fibers (23) to cause them to extend radially outward from the core of the working catheter (16) and when advanced against an atheroma, flail the lesion, reducing it into small particles which can be aspirated out the proximal end of the catheter assembly (10).
Inventors
- 👤 Robert N. Hamlin
- 👤 Robert A. Van Tassel
- 👤 Rick L. Shockey
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 11:30
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320725; B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/049; B08B9/0495; B08B9/0497
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
104 words
An atherectomy catheter for removing atheromas from a blood vessel wall comprising: (a) an elongated flexible tubular shaft (16) having a proximal end and a distal end, said shaft (16) including a plurality of fibers (23) of a predetermined length with one end (25) of each adhered to the outer surface of said shaft (16) and normally extending parallel thereto proximate a portion of said distal end; and (b) means for rotating said shaft (16) at a sufficiently high speed to cause said fibers (23) to project radially outward of said shaft (16) due to centrifugal force for flailing said atheroma and disintegrating same.
Claim 2
Dependent Claim
104 words
An atherectomy catheter for removing atheromas from a blood vessel wall comprising: (a) an elongated flexible tubular shaft (16) having a proximal end and a distal end, said shaft (16) including a plurality of fibers (23) of a predetermined length with one end (25) of each adhered to the outer surface of said shaft (16) and normally extending parallel thereto proximate a portion of said distal end; and (b) means for rotating said shaft (16) at a sufficiently high speed to cause said fibers (23) to project radially outward of said shaft (16) due to centrifugal force for flailing said atheroma and disintegrating same.
Claim 3
Dependent Claim
36 words
The atherectomy catheter (10) as in Claim 1 wherein said plurality of fibers (62) are integrally formed on said shaft (16) by forming a pattern of slits (60) through the wall of said tubular shaft (16).
Claim 4
Dependent Claim
33 words
The atherectomy catheter (10) as in Claim 1 wherein said plurality of fibers (23) comprise monofilament members of a predetermined length bonded at one end (25) only thereof to said tubular shaft (16).
Claim 5
Independent Claim
182 words
A method of conducting an atherectomy procedure comprising the steps of: (a) advancing a balloon tipped tubular guide catheter (12) containing a coaxially disposed and axially moveable drive tube (16) with a cutter member attached to its distal end through the vascular system to the site of the atheroma to be treated, said cutter comprising a plurality of filaments (23) adhered to said drive tube at only one end of said filaments; (b) inflating the balloon (20) on said tubular guide catheter (12); (c) rotating said drive tube (16) and cutter at a predetermined speed sufficient to cause said plurality of filaments (23) to project radially from said drive tube (16) while advancing said drive tube (16) beyond the distal end (18) of said guide catheter (12) and into said atheroma; (d) during step (c), applying a vacuum to the proximal end of said drive tube (16) for aspirating blood and tissue matter through the lumen of said drive tube (16); (e) deflating said balloon (20); and (f) repeating steps (a) through (e) until said balloon (20) passes completely through the atheroma.
Claim 6
Independent Claim
182 words
A method of conducting an atherectomy procedure comprising the steps of: (a) advancing a balloon tipped tubular guide catheter (12) containing a coaxially disposed and axially moveable drive tube (16) with a cutter member attached to its distal end through the vascular system to the site of the atheroma to be treated, said cutter comprising a plurality of filaments (23) adhered to said drive tube at only one end of said filaments; (b) inflating the balloon (20) on said tubular guide catheter (12); (c) rotating said drive tube (16) and cutter at a predetermined speed sufficient to cause said plurality of filaments (23) to project radially from said drive tube (16) while advancing said drive tube (16) beyond the distal end (18) of said guide catheter (12) and into said atheroma; (d) during step (c), applying a vacuum to the proximal end of said drive tube (16) for aspirating blood and tissue matter through the lumen of said drive tube (16); (e) deflating said balloon (20); and (f) repeating steps (a) through (e) until said balloon (20) passes completely through the atheroma.
Claim 7
Dependent Claim
383 words
An atherectomy catheter assembly (10) comprising: (a) a first, flexible tubular member (12) of a predetermined outside and inside diameter having a proximal end, and distal end and a lumen extending from said proximal end to said distal end; (b) an inflatable expander member (20) attached to said distal end of said first tubular member (12) to be inflated by fluid passing through said lumen of said first tubular member (12); (c) a second tubular member (16) having an outer diameter less than said predetermined inside diameter of said first tubular member (12), a proximal end, a distal end, and a lumen extending from said proximal end to said distal end of said second tubular member (16), said second tubular member (16) being coaxially disposed within said lumen of said first tubular member (12) with a predetermined clearance between said outer diameter of said second tubular member (16), allowing rotation and axial displacement of the distal end of said second tubular member (16) beyond the distal end of said first tubular member (12); (d) a cutter member attached to said distal end of said second tubular member (16), said cutter member including a plurality of filamentary strands (23) having one end (25) thereof adhered to said distal end of said second tubular member (16) and normally extending parallel to the axis of said second tubular member (16); (e) motor means coupled to said proximal end of said second tubular member (16) for imparting rotation thereto within said lumen of said first tubular member (12); (f) means coupled to said proximal end of said first tubular member (12) for directing fluid through said lumen of said first tubular member (12) to inflate and deflate said expander member (20); (g) means for applying a negative pressure to said lumen of said second tubular member (16) at the proximal end portion thereof; and (h) means located at said proximal end of said second tubular member (16) for axially extending and retracting said distal end of said second tubular (16) and said cutter member from said distal end of said first tubular member (12) as said second member (16) is being rotated by said motor means, rotation of said second tubular member (16) causing said filamentary strands (23) to project radially from said second tubular member (16).
Claim 8
Dependent Claim
383 words
An atherectomy catheter assembly (10) comprising: (a) a first, flexible tubular member (12) of a predetermined outside and inside diameter having a proximal end, and distal end and a lumen extending from said proximal end to said distal end; (b) an inflatable expander member (20) attached to said distal end of said first tubular member (12) to be inflated by fluid passing through said lumen of said first tubular member (12); (c) a second tubular member (16) having an outer diameter less than said predetermined inside diameter of said first tubular member (12), a proximal end, a distal end, and a lumen extending from said proximal end to said distal end of said second tubular member (16), said second tubular member (16) being coaxially disposed within said lumen of said first tubular member (12) with a predetermined clearance between said outer diameter of said second tubular member (16), allowing rotation and axial displacement of the distal end of said second tubular member (16) beyond the distal end of said first tubular member (12); (d) a cutter member attached to said distal end of said second tubular member (16), said cutter member including a plurality of filamentary strands (23) having one end (25) thereof adhered to said distal end of said second tubular member (16) and normally extending parallel to the axis of said second tubular member (16); (e) motor means coupled to said proximal end of said second tubular member (16) for imparting rotation thereto within said lumen of said first tubular member (12); (f) means coupled to said proximal end of said first tubular member (12) for directing fluid through said lumen of said first tubular member (12) to inflate and deflate said expander member (20); (g) means for applying a negative pressure to said lumen of said second tubular member (16) at the proximal end portion thereof; and (h) means located at said proximal end of said second tubular member (16) for axially extending and retracting said distal end of said second tubular (16) and said cutter member from said distal end of said first tubular member (12) as said second member (16) is being rotated by said motor means, rotation of said second tubular member (16) causing said filamentary strands (23) to project radially from said second tubular member (16).
References Cited (Backward Citations)
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