CSF
Normal
Sodium
(mmol/L)
(mmol/L)
140
140
Calcium
(mmol/L)
(mmol/L)
1.2
(∼50% that of plasma)
(∼50% that of plasma)
2.2-2.6
Potassium
(mmol/L)
(mmol/L)
3.0
4.0-5.0
Chloride
(mmol/L)
(mmol/L)
120
96-106
Bicarbonate
(mmol/L)
(mmol/L)
24 1
(Equal)
(Equal)
24
Glucose
(mmol/L)
(mmol/L)
4
(∼60% that of plasma 1)
(∼60% that of plasma 1)
6
pCO2 (kPa)
6.6 1
5.2
pH
7.32 1
(0.08 lower than plasma)
(0.08 lower than plasma)
7.40
Protein
(g/L)
(g/L)
0.2-0.4
(<1% that of plasma 1)
(<1% that of plasma 1)
70