The invention relates to a puncturing system comprising an outer tubular body which is designed to remain in a body part of a living being characterized in that the puncturing system has at least one inner tubular body and a puncturing needle wherein the inner tubular body is guided through a working lumen of the outer tubular body and can be longitudinally displaced with respect to the outer tubular body and the puncturing needle is guided through a puncture lumen of the inner tubular body and the inner tubular body can be longitudinally displaced with respect to the puncturing needle wherein after a body part has been punctured by means of a puncturing section of the puncturing needle which protrudes out of a patient side end of the puncturing system the inner tubular body can be moved out of the patient side end of the catheter at least partially out of the outer tubular body and is thereby designed to accommodate the puncturing section of the puncturing needle which protrudes out of the patient side end of the catheter at least partially in the puncture lumen of the inner tubular body.
