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Feb 8, 2018

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Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Chemistry

Potassium

Potassium (K) Chemistry Lab Test

Name: Potassium

Test Name: Potassium

Health Link Test Code: K

LIS Test Code: K

CPT Code(s): 84132

Included In: Electrolytes Panel, Basic Metabolic Panel, Comprehensive Metabolic Panel

Methodology: Ion Selective Electrode

Days Performed: Daily, 24 hours.

In-Lab Turnaround Time: 4 hours.

Stat In-Lab Turnaround Time: 1 hour.

Specimen: Blood

Collection Container: Green cap with yellow ring (PST)

Also Acceptable: Green top, Red cap with yellow ring (SST), Red top

Collection Volume: 1 mL

Pediatric Collection Volume: 0.5 mL

Stability Ambient:

PST: 48 hours

SST: 4 days

Stability Refridgerated:

PST: 48 hours

SST: 4 days

Stability Frozen:

1 year

Sample Analyzed: Plasma or serum

Testing Volume: 0.5 mL

Pediatric Testing Volume: 0.2 mL

Specimen Processing:

Centrifuge. Redraw specimen if hemolysis is present. If a complete barrier has not formed, transfer cell-free plasma/ serum to plastic vial. Refrigerate.

Specimen Transport:

Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.

Unacceptable Criteria:

Hemolyzed specimens or whole blood specimens greater than 2 hours old when received by the laboratory are not acceptable.

Interpretation:

 

Age mmol/L
0 days-3 months 3.7-5.9
4-12 months 3.4-4.7
1 year and up 3.5-5.1

Interpretation Type: Reference Interval

Critical Calls: yes