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Table 1 CSF composition reported for human, rabbit and dog

From: Cerebrospinal fluid dynamics and intracranial pressure elevation in neurological diseases

Solute Humana Rabbitb Dogb
Plasma Conc. CSF Conc. Plasma Conc. CSF Conc. Plasma Conc. CSF Conc.
Na+ (mM/L) 153 147 148 149 155 151
K+ (mM/L) 4.7 2.9 4.3 2.9 4.6 3.0
Ca2+ (mM/L) 1.3 1.1 5.6 2.5 5.7 2.9
Mg2+ (mM/L) 0.6 1.1 2.0 1.7 1.4 2.0
Cl (mM/L) 110 113 106 130 121 133
HCO3 (mM/L) 24 22 25 22 26 26
pH 7.40 7.33 7.46 7.27 7.42 7.42
Osmolarity (mOsm) 290 290 298.5 305.2 299.6 305.2
  1. aHuman CSF values from Ransom [37]
  2. bRabbit and dog CSF values from Damkier et al. [38]