SERUM/PLASMA Sodium 137 mmol/L ( 135-145 ) Potassium 5.0 mmol/L ( 3.5-5.5 ) Chloride 102 mmol/L ( 95-110 ) HCO3 26 mmol/L ( 22-30 ) Creatinine 100 umol/L ( 49-90 ) (Creatinine) 0.100 mmol/L ( 0.05-0.09) Urea 11.7 mmol/L ( 2.5-8.3 ) eGFR 47 ( SEE-BELOW)