Due to their clinical outcome high flux dialysers containing new generation of dialyser materials have been widely used for patients with chronic renal failure within the last decade [1]. Dialyser membranes are more prone to damage to to the harsh environment during high flux dialysis. Reuse of dialysers has advantages like better biocompatibility and lower cost, any damage of the dialysers membrane during reuse of the dialysers can also cause very serious clinical complications. Therefore reuse of the dialysers is an issue that has to be approached more cautiously. In this study polysulphone dialyser membranes were being investigated in terms of mechanical properties and changes in crystallinity before and after dialysis sessions. Dialysis sessions were performed on five patients with dialysis age less than two years and without any other accompanying disease at the Hemodialysis Department of Istanbul Haydarpasa Numune State Hospital.

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