Comparison of mean blood sodium concentration at study points between the two groups Time Blood Na+ level (mmol / l) (SD) p Group 1 (3% sorbitol) Group 2 (0.9% NaCl) n Blood Na+ n Blood Na+ t0 50 137.18±3.10 50 138.06±2.53 >0.05 t1 50 136.82±2.28 50 137.84±2.88 >0.05 t2 33 135.76±4.01 34 138.44±3.01 <0.05 t3 15 134.27±5.71 15 138.53±1.19 <0.05 t4 8 131.63±6.70 10 138.00±1.76 <0.05 t5 3 131.67±6.51 1 136 <0.05 t6 50 135.58±3.79 50 137.54±2.71 <0.05 t7 50 136.52±3.69 50 137.70±2.27 >0.05 p0 - 6 <0.05 >0.05 The level of blood sodium reduction before and after surgery in group 1 was statistically different (p <0.05); In group 2, the changes were not statistically significant (p> 0.05).