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Laboratory Test Reference Guide

Laboratory Information

Test Name

Sodium (Blood Gas)

Specimen Collection

Specimen Collection and Transport Protocols

Remove 6 times the volume of the catheter as waste prior to collecting the blood sample from an arterial line.

Adult Specimen

1.5 mL blood collected into a 3 mL heparinised blood gas syringe, capped with filter cap. Remove air immediately after collection by expelling through the filter cap. Mix for 20 seconds. Transport at ambient temperature. Must be analysed within 30 minutes.

Paediatric Specimen

0.5 mL blood collected into a 1 mL heparinsed blood gas syringe, capped with a filter cap. Remove air immediately after collection by expelling through the filter cap. Mix for 20 seconds.

Sample Delivery to Lab

Ambient.

Test Information

Department

Biochemistry and POCT

Test Availability

Mon - Sun, 24hrs

Laboratory Turnaround Time

30 minutes.

Method

Blood Gas - Direct ISE;

Unit Of Measurement

mmol/L

Reference Interval

135 - 145 mmol/L

Uncertainty Of Measurement

± 3

Minimum Volume

90µL collected in to a 100 µL capillary tube.

Electronic Information

Registration Code

SODBG

HL7Mapping Code

$SODBG

LOINC Code

2947-0