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Test & Collection Guide

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Potassium, Direct

Laboratory:
Biochemistry
Test Code:
K
Specimen types:
Blood
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
Minimum Adult Volume:
1 mL
Paediatric Minimum Volume:
0.5 mL
Notes:

In very lipaemic samples, falsely low values are obtained with some routine methods for potassium measurement.

Direct analysis with ion-selective electrodes is used when siginificant lipaemia is noted, or when particular urgency dictates analysis of whole blood.

All blood gas analysers use 'direct' methods of measurement.

Results for 'direct' potassium are always comparable to standard 'indirect' methods

Frequency:
Daily
Result Turnaround Time:
1 hours