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 movably;
a removing member 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; and
a guide member, flexible and long, which penetrates said inner tube so that said guide member functions as said axis of said inner tube when said inner tube rotates,wherein said removing member has a developed state in which a distal end of said removing member unfolds when said removing member is projected from a distal portion of said outer tube and radially expands owing to an elastic restoring force thereof, and said removing member can drill said occlusive material in said developed state by rotating said removing member about said guide member functioning as an axis of said removing member and moving said removing member toward a distal end of said atherectomy catheter.
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.
60 Citations
42 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 movably; a removing member 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; and a guide member, flexible and long, which penetrates said inner tube so that said guide member functions as said axis of said inner tube when said inner tube rotates, wherein said removing member has a developed state in which a distal end of said removing member unfolds when said removing member is projected from a distal portion of said outer tube and radially expands owing to an elastic restoring force thereof, and said removing member can drill said occlusive material in said developed state by rotating said removing member about said guide member functioning as an axis of said removing member and moving said removing member toward a distal end of said atherectomy catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. 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 movably; 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. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification