Xanthochromia

Test information: The Xanthochromia test is performed to aid identification of patients who have had a Subarachnoid Haemorrhage.

Specimen Type(s)

• Cerebrospinal fluid;

Other Acceptable Specimen Type(s)

N/A

Specimen Container - Adult

• Plain Universal;

Specimen Container - Paediatric

• N/A;

Analytes

• N/A;

Part of a test profile?

No

Volume (min) of sample to be sent to laboratory

1ml

Patient Preparation, Sample Handling and Transport

Should be the 4th pot of CSF collected, protected from light immediately. Samples should be collected 12 hours after the onset of symptoms to allow bilirubin to form. Please state timing of onset of symptoms. Sample must be hand delivered, pneumatic tube system may compromise the sample. A paired serum sample for bilirubin and protein may be required for interpretation.

Maximum add on time

Consultation with Biochemist required

Units and Reference Ranges / Interpretation

Interpretative comment

UKAS number

8869

UKAS accredited test?

Yes

Comments

Lumbar puncture for xanthochromia cannot be repeated for at least 2 weeks after the initial LP. This is due to the high risk of generating a false positive result from leakage of blood into the CSF during the 1st tap.

If you have any queries about a test or results interpretation please contact us.