THE STUDY ON LUBRICITY PROPERTIES OF ARTERIAL VENOUS FISTULA NEEDLES

Silicone fluid is applied to reduce the friction of medical device in this study. Several factors, which might affect the friction of Arterial-Venous Fistula (A. V.F.) Needles, were investigated by a series of experiments. The experimental results showed that a better condition for the coating is using 10/90-weight ratio of MDX4/n-hexane silicone solution and dipping for 1.5 seconds. Two-step coating with an interval of 20 minutes also was examined to give an improvement in the lubricity of needles. It was observed that increased DC 360 concentration in coating solution displays more excellent friction reduction properties. Experimental consequences also showed that the lubricity of needles coated with DC 360 (350cst) is superior to that of coated with DC 360 (12,500cst).