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Test & Collection Guide

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Alternate names:
HCO3, Total CO2
Specimen types:
Container types:
Serum tube with gelSerum tube with gel
Collection Instructions:
Transport specimen at Room Temperature to lab
Sample haemolysis may make this test unreportable

Measurement must occur within a few hours of sampling.

Bicarbonate will not be measured on old specimens.

A calculated 'actual bicarbonate' is part of Blood Gases assay

Minimum Adult Volume:
1 mL
Paediatric Minimum Volume:
0.5 mL
Result Turnaround Time:
4 hours
Reference Interval:

(Adult) 22-32 mmol/L

Pathology Handbook

Test & Collection Guide


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