Figure 1.
Flow chart of inclusion of CSF samples.
N – number of CSF samples.
Table 1.
Age-specific reference values for CSF glucose, CSF/plasma glucose ratio and CSF lactate.
Table 2.
Summary of literature search for reference ranges of CSF glucose, CSF/plasma glucose ratio and CSF lactate.
Figure 2.
Age-specific CSF glucose, CSF/plasma glucose ratio and CSF lactate values.
(A) CSF glucose concentration in 8,871 samples. CSF samples with CSF glucose >10.0 mmol/L (n = 4) are not shown; (B) CSF/plasma glucose in 4,516 samples. CSF samples with CSF/plasma glucose >1.5 (n = 5) are not shown; (C) CSF lactate concentration in 7,614 samples. CSF samples with CSF lactate >5000 µmol/L (n = 22) are not shown. Lines indicate 5th and 95th percentile values.
Figure 3.
Relation between plasma glucose and CSF glucose.
(A) Relation between plasma glucose and CSF/plasma glucose ratio in 4,508 CSF samples. CSF samples with CSF/plasma glucose ratio >1.5 (n = 5) are not shown. (B) Relation between plasma glucose and CSF glucose in 4,513 CSF samples. The grey areas indicates normoglycemia (plasma glucose >3.0 and <7.8 mmol/L).