Result: Study of 61 dialyzer reuses which are used on 61 patients applied long-term hemodialysis, with total of 610 times of dialysises (each dialyzer are used 10 times) we revealed that: average URR in the first time is 75.38 ± 3.03% and Kt / V 1.41 ± 0.13, in the five reuse: URR 73.05 ± 2.12 and Kt / V 1.31 ± 0.08, in the ten reuse: URR 71.09 ± 1.74 and Kt / V 1.24 ± 0.06.