Table 1 Comparison of composition of CSF and blood plasma
From: Mechanisms of fluid movement into, through and out of the brain: evaluation of the evidence
Component | Ref. | CSF | Blood plasma |
|---|---|---|---|
| Â | Concentration/mg (100 ml)-1 | ||
Protein | a | 16 to 38 | 6300 to 8500 |
Sugar | a | 45 to 80 | 80 to 120 |
Amino acids | a | 1.5 to 3 | 4.5 to 9 |
Creatinine | a | 0.5 to 2.2 | 0.7 to 2 |
Uric acid | a | 0.4 to 2.8 | 2.9 to 6.9 |
Urea | a | 5 to 39 | 22 to 42 |
Cholesterol | a | trace | 100 to 150 |
Lactic acid | a | 8 to 25 | 10 to 32 |
Phosphate (inorganic) | b | 3.4 | 4.7 |
| Â | Concentration/mmol kg-1 | ||
Na+ | b | 147 | 150 |
K+ | b | 2.86 | 4.63 |
Ca2+ | b | 1.14 | 2.35 |
Mg2+ | b | 1.1 | 0.8 |
Cl− | b | 113 | 99 |
| b | 23.3 | 26.8 |
pH | b | 7.3 | 7.4 |
