Specimen Name Result Units Range
Plasma Sodium 148 mmol/L (135-145)
Potassium 1.0 mmol/L (3.5-5.5)
Chloride 125 mmol/L (100-109)
Bicarbonate 16 mmol/L (22-32)
Glucose 5.5 mmol/L (3.8-5.5)
Urea 4.5 mmol/L (2.7-7.2)
Creatinine 50 μmol/L (60-110)
Osmolality 306 mmol/kg (275-295)

76yo lady admitted for elective cholecystectomy.

Day 1 post-op.
Drip-arm Sample : N-saline
  • [Na+] = [Cl-] ≈ 154 mmol/L
  • Osmolality ≈ 308 mOsm/kg
  • pH ≈ 4-7