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Test Code K Potassium, serum

Specimen Requirements

Submit only one of the followings


Preferred
Specimen Type: Serum
Container/Tube: Gold Top (SSTII) 
Volume: 5.0mL
Minimum Volume: 0.5 mL Serum
Collection Instructions: Allow specimen to clot for 30 minutes and centrifuge within 2 hours

 

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Acceptable
Specimen Type: Plasma
Container/Tube: Green Top (Li Heparin/PST)
Volume: 4.5mL
Minimum Volume: 0.5mL plasma
Collection Instructions: Centrifuge within 2 hours

Sample Stability

** Preferred temperatures for storage prior to and during shipping to NUH **

 

Specimen Type: Serum/Plasma
Ambient: 7 days
Refrigerate: 7 days
Frozen: 1 year

 

Reference Interval

0 – < 1 mth 3.6 – 6.0 mmol/L
1 mth – < 1 yr 3.6 – 5.8 mmol/L
1 – 14 yrs 3.5 – 5.5 mmol/L
≥15 yrs 3.5 – 5.2 mmol/L

 

Critical Values: <2.5 mmol/L or > 6.0 mmol/L

Days and Times Performed

24 hours, TAT 1 day

Methodology

Ion-selective electrode diluted (Indirect)

Service Code

31112

Update

Last updated 26/02/2022

Unacceptable Condition

 

Haemolysis NA
Icterus NA
Lipaemic NA
Others NA

 

Testing Laboratory

National University Hospital

Clinical Chemistry, 67724346

Useful For

Assessment of electrolyte balance