Level of Hb (g / dl), serum albumin (g / l), cholesterol (mmol / l), TG (mmol / l), systolic, diastolic blood pressure (mmHg) in patients hemodialyzed by LF versus HF dialyzer respectively is: 10.96±1.45 vs 10.47±2.2 (p=0.31); 38.32±4.58 vs 38.42±4.41 (p= 0.07); 4.8±1.03 vs 4.89±1.08 (p= 0.85); 2.06±1.22 vs 1.92±1.0 (p= 0.6); 145±14.8 vs 145.7±12.69 (p= 0.83); 77.19±6.27 vs 77.41±3.76 (p= 0.85).