The invention relates to a device for creating an access to a hollow organ, comprising a cannula (2), a guide wire (3), and a catheter (4), and it further relates to a special tool for removing the syringe from the catheter after catheterization, and finally it relates to a method for creating an access to a hollow body, wherein the hollow body is punctured by means of a cannula of a syringe, wherein the cannula and the syringe are separated after puncturing, wherein a guide wire is inserted through the cannula into the hollow body, wherein a catheter is inserted along the guide wire into the vessel, and wherein the guide wire is removed after the catheter is placed. The risk of contamination in placing the catheter is to be reduced. This is achieved in that the cannula (2) is part of a syringe (5) having a passage opening (6) for the guide wire (3) and the catheter (4), and that the syringe (5), the catheter (4), and the guide wire (3) are disposed inside a closed system in the form of at least one cladding (7, 8, 9), wherein the device can be actuated from the outside, and the cladding (7) can be perforated by the cannula (2).
