In the maintenance phase of AKI: serum ure (mmol / l); creatinin (µmol / l); K (mmol / l); Na (mmol / l); pH, HCO; pCO and pO in HA-AKI vs CA-AKI were 27.89±13.89 vs 27.65±14.54 (p>0.05); 372.54±184.12 vs 414.54±253.26 (p>0.05); 4.66±1.06 vs 4.81±0.96 (p>0.05); 135.77±7.76 vs 133.70±21.16 (p>0.05); 7.39±0.09 vs 7.35±0.12 (p>0.05); 19.71±5.41 vs 18.28±6.28 (p>0.05); 32.09±7.82 vs 32.67±10.21 (p>0.05) and 95.59±39.93 vs 88.71±27.57 (p>0.05).