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  PTD - 176

Test Directory -  Bicarbonate

Synonyms

TC02, Total C02, HC03

Clinical Indications

Investigation of acidosis/alkalosis.

Request Form

Combined Pathology Blood form (Yellow/Black)

Availability

On request. 

Patient Preparation

None required

Limitations

 

Please note that this test cannot be added on to existing specimens as uncapped samples lose bicarbonate to air.

Turnaround Time

Same day

Specimen

Plasma

Volume

2 ml

Container


Green top (lithium-heparin) tube or


Paediatric orange top (lithium-heparin)

A separate green top (lithium-heparin) tube must be taken for adults and samples must be transported to the laboratory within 4 hours of collection

Causes for Rejection

Unlabelled sample.

Reference Range

Serum Bicarbonate: 22 - 29 mmol/L

Reference: Pathology Harmony Group, Clinical Biochemistry Outcomes, January 2011 (www. pathologyharmony.co.uk)

Interpretation

Decreased in metabolic acidosis (e.g. DKA) and respiratory alkalosis (overbreathing). Raised in compensated respiratory acidosis and metabolic alkalosis.

Lab Handling

 

Processing: Test code BIC. Centrifuge and store at 4C in separating fridge (CB39) before processing on primary sample. NOBIC if no sample received or requested as an add-on.


Version 1.2 / February 2015                                                                                                         Approved by: Consultant Biochemist