Catheter for aspirating, fragmenting and out transport of removable material from blood vessels.

摘要

The invention relates to a catheter for aspirating, fragmenting and out conveyance of removable material from hollow bodies, in particular thrombi and emboli from blood vessels, with a over a guide wire (4), regardless of this displaced axially disposed at the distal end of the catheter working head (1) having at least one lateral opening. The catheter has a head remote from the work by means of a rotary drive of a drive unit at a speed set in rotation flexible feed screw (3) with a distal and a proximal portion. A conveyor screw (3) surrounding, connected flexible with the working head tube is used for the removal of the material or the detached thrombi and emboli fragments. The conveyor screw (3) is as with the opening of the working head (1) cooperating, formed shear-cutting tool in order to comminute between the peripheral edges of the conveying screw (3) and edges of the openings the invading materials or aspirated and / or detached thrombi and emboli and remitted. For axial support of the conveyor screw (3) an axial thrust bearing (5) is disposed between the distal end of the feed screw (3) and the working head (1).