Patent ID: 8900257
Filing Date: 2014-12-02
Classification: A61B,A61F

Abstract:
1. A process of aspirating, fragmenting and extracting removable deposit material from a hollow body, comprising the steps of: providing a proximal end of a reducing catheter; providing a distal end of the reducing catheter; providing a working head at the distal end; providing a stator at the working head; providing a rotatably-mounted rotor rotatable relative the stator; providing a first guide wire for guiding the working head; providing a screw operatively connected to the rotor and disposed surrounding at least a portion of the guide wire; providing a flexible sleeve surrounding the screw and connected to the stator; providing, at the proximal end of the reducing catheter, a drive unit for driving the screw; providing at least one lateral inlet opening on the stator's circumference; inserting the reducing catheter into the hollow body in a first direction; providing a sheathing catheter; providing a second guide wire for guiding the sheathing catheter; inserting the second guide wire into the hollow body in a second direction opposite to the first direction; withdrawing, at least in part, the second guide wire; inserting the sheathing catheter into the hollow body before said step of inserting the reducing catheter into the hollow body in the first direction; introducing the first guide wire into the sheathing catheter end, at least over a region thereof, before said step of guiding the reducing catheter on the first guide wire; guiding the reducing catheter on the first guide wire; forcing deposit material into the at least one lateral opening and cutting this deposit material between peripheral edges of the at least one lateral opening and of the stator; positioning the inserted sheathing catheter in front of deposit material to be removed; and, occluding, with an expandable end piece of the sheathing catheter, a cross section of the hollow body, at least in part.