List of reference ranges for cerebrospinal fluid
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Following is a list of reference ranges for cerebrospinal fluid:
| Substance | Lower limit | Upper limit | Unit | Corresponds to % of that in plasma[clarification needed] |
|---|---|---|---|---|
| Osmolality | 280[1] | 300[1] | mmol/L | |
| Sodium | 135[1] | 150[1] | mmol/L | |
| Potassium | 2.6[1] | 3.0[1] | mmol/L | |
| Chloride | 115[1] | 130[1] | mmol/L | >100%[1] |
| Calcium | 1.00[1] | 1.40[1] | mmol/L | ~50%[1] |
| Magnesium | 1.2[1] | 1.5[1] | mmol/L | >100%[1] |
| Iron | 0.2[1] | 0.4[1] | μmol/L |