Test Code K Potassium, Plasma or Serum

Methodology

Ion-Selective Electrode (ISE)

Munson Healthcare Laboratories

Submit only 1 of the following specimens:

Plasma

Container/Tube: Green-top (heparin) gel tube

Specimen Volume: 0.5 mL of heparinized plasma

Transport Temperature: Refrigerate

Collection Instructions: Centrifuge tube within 1 hour of draw.

Note: 1. Indicate plasma.

2. Label specimen appropriately (plasma).

Serum

Container/Tube: Gold-top serum gel tube

Specimen Volume: 0.5 mL of serum

Transport Temperature: Refrigerate

Collection Instructions: Centrifuge tube within 1 hour of draw.

Note: 1. Indicate serum.

2. Label specimen appropriately (serum).

3.4-5.0 mmol/L

Critical values (automatic call-back):

Pediatric patients up to 21 years old: ≤ 2.5 mmol/L, ≥ 6.5 mmmol/L

Patients 21 years and older: ≤2.5 mmol/L or ≥ 6.0 mmol/L

Monday through Sunday

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