Patent ID: 8568432
Filing Date: 2013-10-29
Classification: A61B

Abstract:
1. A catheter for aspirating, fragmenting and removing extractable material from hollow bodies, in particular thrombi and emboli from blood vessels, comprising: a working head, which has an inner diameter of an inner surface, arranged at a distal end of the catheter and axially displaceable along a guide wire, independently thereof, which working head comprises at least one lateral opening; a flexible tube connected to the working head to remove the material or the detached thrombi and emboli fragments; and a flexible feed screw disposed within the flexible tube and the working head, the flexible feed screw having an outer diameter, a distal end and a proximal end, and rotating at a speed of rotation by means of a rotary drive of a drive unit remote from the working head, the feed screw being designed as a shearing cutting tool which cooperates with the opening in the working head in order to size-reduce the materials or aspirated and/or detached thrombi and emboli which penetrate between the peripheral edges of the feed screw and edges of the at least one lateral opening; and a thrust bearing arranged between the distal end of the feed screw and the working head, the thrust bearing being designed as a disc which is rotated by the feed screw during operation.