The study was conducted in 45 patients with chronic renal failure hemodialysis (41 male: 91.2 percent, 4 females: 8.8 percent), mean age: 44.4 + or - 10.4 (200 times of dialysis in total) in Kien An Hospital Hai Phong. Resultat: Clinicals symptoms before filter are the most common: fatigue (62 percent), facial edema (60.5 percent), leg swelling (20.5 percent), hepatomegaly (16.5 percent), other less common symptoms such as headache, dry cough, chest pain... 100 percent of patients had anemia in the level of moderate or severity, including severe anemia accounted for 33.3 percent. 68.8 percent of patients with hypertension, including hypertension stage III accounted for 37.7 percent. 35.6 percent of patients had heart failure, including heart failure stage III accounted for 15.6 percent. Only 1 patient had cardiac arrhythmias (atrial fibrillation, 2.2 percent). The average value of erythrocyte, hemoglobin, hematocrit was decreased in the level of moderate to severe anemia. The average number of platelets is not significantly reduced compared with normal limits. Reduction of calcium was grave " 1.9mmol/I), increased blood uric acid and increased blood potassium than normal limits. The increased average value of urea and creatinine in the level severe renal insufficiency. The average value of total protein and albumin in the level of low-normal range. There was a pretty tight negative correlation between serum creatinine with: number of erythrocyte (r = 0.50), hemoglobin (r = -0.61) and hematocrit (r = 0.56). There was a pretty tight positive correlation between serum creatinine with mean blood pressure (r = 0.52).