After one cycle of haemofiltration, improvements of certain patients' clinical symptoms and laboratory values have been observed (p < 0, 05), which were: the average Glasgow Coma Scale, average respiratory rates, average PaO2, average PaO2/FiO2 values of patients who had the initial PaO2/FiO2 of less than 300 mmHg, average FiO2 of patients who required CPAP, ratios of patients with respiratory acidosis, PaCO2, pH, HCO3 -, urea, creatinin, SGOT, SGPT, total bilirubin, CPK, serum Na+ and K+ values, PRISM scores, and PELOD scores.