Catheter for detaching abnormal deposits from blood vessels in humans
First Claim
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1. A catheter for detaching abnormal deposits from blood vessels in humans comprising:
- a cutting tool comprising a stator and a rotor, said rotor surrounding a portion of said stator, said rotor and said stator configured to allow relative rotational motion between said rotor and said stator, said rotor including a rotor cutting edge arranged in a circumferential surface of said rotor, said stator including a stator cutting edge arranged in a circumferential surface of said stator, wherein said stator cutting edge is configured to oppose said rotor cutting edge so as to produce a shearing action between said stator cutting edge and said rotor cutting edge when said rotor is rotated relative to said stator;
a rotary drive mechanism configured to rotate said rotor; and
a tubular sheath communicating with said cutting tool, said sheath defining a discharge path for deposits detached by said cutting tool.
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Abstract
The catheter connected to a drive unit has, at its front end a cutting tool which consists of a stator and rotor. Cutting edges arranged on the circumference of the rotor and stator interact in a shearing action. The rotor is an external rotor. The detached deposits are conveyed through a tubular sheath and into a collecting container via a discharge chamber. A rotary catheter of this kind is used for carefully removing blood clots and stenoses from narrowed blood vessels such as arteries and veins.
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Citations
20 Claims
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1. A catheter for detaching abnormal deposits from blood vessels in humans comprising:
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a cutting tool comprising a stator and a rotor, said rotor surrounding a portion of said stator, said rotor and said stator configured to allow relative rotational motion between said rotor and said stator, said rotor including a rotor cutting edge arranged in a circumferential surface of said rotor, said stator including a stator cutting edge arranged in a circumferential surface of said stator, wherein said stator cutting edge is configured to oppose said rotor cutting edge so as to produce a shearing action between said stator cutting edge and said rotor cutting edge when said rotor is rotated relative to said stator; a rotary drive mechanism configured to rotate said rotor; and a tubular sheath communicating with said cutting tool, said sheath defining a discharge path for deposits detached by said cutting tool. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification