Test Name

Potassium

Specimen Type & Acceptability

Serum
7 days refrigerated

General Use

Routine electrolyte that is important for cardiac function. It is evaluated in routine testing, patients on diuretics, heart medication and serious illnesses.

CPT Code(s)

84132

Special Instructions

Let clot for 10-20 minutes. After the sample is fully clotted, centrifuge the sample. Verify complete separation of cells and serum and refrigerate.

Container/Tube Type

Volume

0.5 mL Min. vol. = 100 ul

Suggested Tube Types

Description

Typical Volume

Gold Top Serum Separator Tube (SST)

⋜ 5 mL

Tiger Top Serum Separator Tube (SST)
^For larger volume tests

> 5 mL

Red Top Tube (No additive)

⋜ 5 mL

EDTA Whole Blood

3 mL

3.2 % Sodium Citrate Whole Blood

2.7 mL

Lithium Heparin Plasma Separator Tube

⋜ 5 mL