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Beta 2 Transferrin

Ordering Info & Methodology

Test Code

Cerner Synonyms


CSF Leak Investigation, CSF Leak Investigation (Beta Trace Protein, Beta 2 Transferrin), CSF Screen, beta 2 transferrin, CSF leak

Turn Around Time


Same day when arrives Mon-Fri before 15:00

Calculated Value

Ordering Guide

Beta 2 Transferrin will be added if indicated by the beta trace results.

Specimen Requirements

Sample Type

Collection Container

Alternate Collection Containers

CSF, Serum (send both)

Cannot be added on to previously collected sample.

Add on stability
This is the length of time after sample collection that this analyte is stable. Test can be added to a previously collected sample if the time since collection is less than the add on stability time.

Minimum Volume

Add On Stability

Collection and Shipping Requirements

Freeze. Send on ice pack. Must arrive at SPH frozen. Must arrive before 15:00 Mon - Fri to be processed STAT.

Reference Intervals

Female Reference Interval

Age Category
Reference Interval
≥0 y

Male Reference Interval

Age Category
Reference Interval
≥0 y
Additional Notes

Measurement Uncertainty (MU)
Every laboratory value is an estimate of the true concentration of substance. MU is the 95% confidence interval around that estimate. 95% of the time, the true concentration will be within the range of the reported value ±MU. This value is based on analytical variability (precision) and does not reflect other factors such as sample collection and handling which may also affect the result.


Reported sodium = 140 mmol/L
Sodium MU = 1%
Expanded uncertainty = 140 mmol/L ± 1% or 140mmol/L ± 1.4 mmol/L
Interpretation - the true value of sodium in the sample is in the range 138.6-141.4 mmol/L, with 95% confidence.


Measurement Uncertainty

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