Ported iv canula should be with vialon biomaterial which becomes up to 70 percent softer once inside vein and pliable for high indwelling time, biocompatibility and hemocompatibility thus reducing thrombophlebitis. vialon biomaterial also ensures low platelet adherence thus ensures consistent flow rates. it should be kink resistant cannula with an extremely smooth and outer surfaces, tapered catheter tip to ensure easy veni - puncture with minimum trauma .should have super sharp stainle