The authors present their initial experience with implantation of external porous PTFE prosthesis in transpositioning of the basilic vein in brachiocephalic fistules in 5 patients and in the management of radiocephalic fistules in 4 subjects during, operated from October 2006 to April 2007. Implantation of the external porous PTFE prosthesis in venous transpositions to form AVFs is aimed at prevention of pseudoaneurysms formation, as well as at prevention of development of intimal hyperplasias. The external prosthesis implantation is indicated in aneurysmoraphies, where the venous wall is weakened as a result of its suturing, which makes it predisposed for development of a new pseudoaneurysm.