Importance

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Abstract

An atherectomy cutting device for removing obstructive tissue from the lumen of a body vessel comprises a guide wire positionable in the lumen of the vessel, and a rotatable cutter supported on an eccentric wire. The eccentric wire has a distal portion extension establishing a substantially right angle with the eccentric wire and having a ring to permit sliding movement of the eccentric wire and cutter along the guide wire. The extension and eccentric wire also permit manipulative movement of the rotatable cutter in an arc around the guide wire. There is included a dual lumen sheath having a first lumen for supporting the guide wire and a second lumen for supporting the eccentric wire carrying the rotatable cutter. Also included is a method for removing obstructive tissue which involves manipulating the eccentric wire about the guide wire to move the cutter in an arc about the guide wire and thus increase the portion of obstructive tissue contacted by the cutter.

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First Claim