Abstract: The invention relates to an aspiration catheter for the extraction of thrombotic material from blood vessels, with a first and a second lumen, wherein the first lumen is distally provided with an aspiration opening and the second lumen of smaller cross section than the first lumen and extending coaxially in the distal region of the first lumen being provided with a lateral as well as distally located opening, said lateral opening reaching through the wall of the catheter. Within the first lumen a stabilization wire is movably arranged which terminates distally of the lateral opening of the second lumen but proximally of the aspiration opening of the first lumen.