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Laboratory values(CSF)

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

Concentration of sodium, potassium and urea are similar to those found in the plasma.

The normal ranges for some of the other CSF components are:

  • glucose - 3.3 to 4.4 mmol/l; normally at least two thirds of the blood glucose levels
  • chloride, 122 to 128 mmol/l
  • lactate less than 2.8 mmol/l
  • pressure less than 200 mm CSF
  • protein less than 430 mg/l, with an albumin:globulin ratio of aproximately 8:1
  • lymphocytes less than 4 per cubic millimetre. In the neonatal period this figure can be up to 25, and in a bloody tap one extra white cell can be allowed for every 500 red cells.
  • polymorphs - none
  • pH 7.31

The normal adult CSF volume is about 130 ml.


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