The frequency of hemofiltration and perfusion depends on the condition of the patient. In general, 4 times of filtration and 2 times of perfusion in a month are recommended for maintenance hemodialysis patients.
For uremia patients with regular hemodialysis, perfusion can be used twice a month to remove toxins bound to plasma proteins or large molecule toxins such as β2-microglobulin, parathyroid hormone, etc., and to relieve itching or insomnia; for those who are poisoned by medicines or toxins, perfusion can also be used to increase the excretion of toxins and to alleviate the symptoms.
Hemodiafiltration is closer to normal glomerular function, which can remove small and medium molecules of toxins and is more hemodynamically stable, and is suitable for patients with acute renal failure with hypervolemia and severe heart failure. Four monthly hemofiltrations are recommended for maintenance hemodialysis patients to increase dialysis adequacy.
Patients who need dialysis treatment are advised to communicate with the doctors of their dialysis centers, who will formulate an appropriate dialysis mode according to their conditions.