Importance

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Abstract

A device for incising and dilating a stenosis in a vessel of a patient includes a dilator housing and a plurality of incising blades which can be selectively extended distally from the housing. Specifically, the plurality of blades are mounted on a base member which is attached to the distal end of a push-pull catheter. The housing has a plurality of slits which are positioned distally from the base member with the blades on the base member in alignment with the slits in the housing. A placement catheter is positioned in a surrounding relationship over the push-pull catheter, and the distal end of the placement catheter is attached to the housing to create a chamber between the placement catheter and the housing in which the base member is located. In the operation of the device, the push-pull catheter is manipulated distally and proximally in the placement catheter to move the base member within the chamber between a first position and a second position. In the first position the blades are withdrawn into the housing and the housing is used as a dilator. In the second position the blades are extended distally through the slits in the housing and the device is used as an incisor.

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First Claim