Table 1.

Normal composition of CSF

	Normal range
Color	Clear
Specific gravity/pH	1.006–1.007/7.4
Opening pressure	50–200 mm H2O
RBCs count	Nil
WBC count	0–5 (upto 30 in neonates)
WBC types	Lymphocytes
CSF Proteins	15–40 mg/dL
CSF lactate	1–3 mmol/ L
CSF glucose	50–80 mg/dL (two thirds of blood glucose
Microbial examination	No microorganism