Pathology

Please note : to avoid sample deterioration, DO NOT send CSF specimens via the vacuum chute system.

THERE MUST BE A MINIMUM OF 0.6 mL OF CSF OR THE TEST CANNOT BE PERFORMED

This test is specialised and will only be performed on CSF's when:

CT scan is negative

Four tubes must be collected and the container of the 4th tube must be wrapped in foil (please Label specimen before wrapping in foil)

A white top tube must be collected for simulataneous measurement of serum Bilirubin and serum Protein (or add on to existing bloods within 6 hours of CSF collection).

CSF xanthochromia checklist

Sample collected >12hrs from onset symptoms - Preferred

4^th CSF sample - Preferred

Sample light protected immediately - Preferred. Wrap the tube in foil and inform biochemistry scientist if sample was not received in foil.

Sample transported manually to lab - Preferred. Inform biochemistry scientist if sample is transported via the pneumatic chute

Serum sample for bilirubin & protein - Essential

Slip with clinical notes and contact details - Essential

MH and AH send via taxi ASAP and notify BH laboratory.

CSF is a precious specimen. Do not cancel testing. Refer to the laboratory for any queries.

Please quickly check that the tube is labelled underneath the foil before passing to Scientist.

The specimen designated for spectrophotometry should be centrifuged at 2000 rpm for 5 min as soon as possible after receipt in the laboratory. The supernatant must be stored in the dark at 4⁰C until analysis.