Atherectomy catheter
First Claim
1. An atherectomy catheter comprising:
- a flexible outer tube;
a flexible inner tube which is inserted into said outer tube rotatably about an axis thereof and axially movable;
first and second removing members fixed to a distal portion of said inner tube and accommodated in said outer tube to drill and remove an occlusive material which stenoses or occludes a lumen of a tubular organ,wherein said first and second removing members project from a distal portion of said outer tube and radially expand, thus having a developed state in which a distal end of each of said first and second removing members unfolds;
first and second convex portions formed on a periphery of said distal portion of said inner tube and first and second tubular members into which said distal portion of said inner tube is inserted;
wherein said distal portion of said inner tube is inserted into said first tubular member with said first tubular member disposed nearer to a proximal side of said atherectomy catheter than said first convex portion formed on said inner tube, and said first tubular member is fixed to said periphery of said inner tube with a proximal portion of said first removing member disposed between said periphery of said inner tube and an inner periphery of said first tubular member, whereby said first removing member is fixed to said inner tube; and
said distal portion of said inner tube is inserted into said second tubular member with said second tubular member disposed nearer to a proximal side of said atherectomy catheter than said second convex portion formed on said inner tube, and said second tubular member is fixed to said periphery of said inner tube with a proximal portion of said second removing member disposed between said periphery of said inner tube and an inner periphery of said second tubular member, whereby said second removing member is fixed to said inner tube.
1 Assignment
0 Petitions
Accused Products
Abstract
An atherectomy catheter includes an outer tube; an inner tube which is inserted into the outer tube rotatably about an axis thereof and axially movably; a removing member fixed to a distal portion of the inner tube and accommodated in the outer tube to drill and remove an occlusive material which stenoses or occludes a lumen of a blood vessel; and a guide member mounted on the inner tube in penetration therethrough so that the guide member functions as the axis of the inner tube when the inner tube rotates. The removing member has a developed state in which a distal end of the removing member unfolds when the removing member is projected from a distal portion of the outer tube and radially expands owing to an elastic restoring force thereof, and the removing member can drill said occlusive material in the developed state by rotating about the guide member functioning as an axis of said removing member and moving the removing member toward a distal end of the atherectomy catheter.
74 Citations
13 Claims
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1. An atherectomy catheter comprising:
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a flexible outer tube; a flexible inner tube which is inserted into said outer tube rotatably about an axis thereof and axially movable; first and second removing members fixed to a distal portion of said inner tube and accommodated in said outer tube to drill and remove an occlusive material which stenoses or occludes a lumen of a tubular organ, wherein said first and second removing members project from a distal portion of said outer tube and radially expand, thus having a developed state in which a distal end of each of said first and second removing members unfolds; first and second convex portions formed on a periphery of said distal portion of said inner tube and first and second tubular members into which said distal portion of said inner tube is inserted; wherein said distal portion of said inner tube is inserted into said first tubular member with said first tubular member disposed nearer to a proximal side of said atherectomy catheter than said first convex portion formed on said inner tube, and said first tubular member is fixed to said periphery of said inner tube with a proximal portion of said first removing member disposed between said periphery of said inner tube and an inner periphery of said first tubular member, whereby said first removing member is fixed to said inner tube; and said distal portion of said inner tube is inserted into said second tubular member with said second tubular member disposed nearer to a proximal side of said atherectomy catheter than said second convex portion formed on said inner tube, and said second tubular member is fixed to said periphery of said inner tube with a proximal portion of said second removing member disposed between said periphery of said inner tube and an inner periphery of said second tubular member, whereby said second removing member is fixed to said inner tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification