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