Component Unit Human* normal CSF ARTCEREB Normal saline Lactated Ringer’s solution Na+ mEq/L 145.5 145.4 154 130.0 K+ mEq/L 2.8 2.8 ---- 4.0 Mg+ mEq/L 2.2 2.2 ---- ---- Ca2+ mEq/L 2.3 2.3 ---- ---- Cl- mEq/L 111.9 128.5 154 109.0 HCO3- mEq/L 23.1 23.1 ---- 28.0*** P mmol/L 1.1 1.1 ---- ---- Glucose g/L 0.61** 0.61 ---- ---- Osmotic ratio* approx.0.9   mosm/kg H2O approx. 1 approx. 1 1 pH   7.307 ≒ 7.3 4.5 ~ 8.0 6.0 ~ 8.5 *Davson, **Milhorat, ***Lactate. [Modified and translated with permission from reference [11]]

Table 1: Composition of test solution and human normal CSF.