TEST DIRECTORY | MIDx Labs

POTASSIUM (K)

Major intracellular cation critical for cardiac and neuromuscular function.

LIS TEST CODE: K

CPT CODE: 84132

ALIASES: K

METHODOLOGY: Ion-Selective Electrode Diluted (Indirect)

SPECIMEN:

- Type: Serum

- Container: Gold Top (SST) Vacutainer

- Minimum Volume Required: 1 mL

- Storage/Handling: Allow 30 minutes for blood to clot, then centrifuge specimen at 3500 RPM for 10 minutes. Maintain specimen at either room temperature, in the refrigerator, or in the freezer until testing can be performed.

NOTE: If freezing is required to preserve stability, transfer serum into a separate plastic screw-cap transport container.

- Stability: Room Temperature (20-25 °C): 7 days

Refrigerated (2-8 °C): 7 days

Frozen (-20 °C or colder): 1 year; avoid multiple freeze/thaw cycles.

- Turnaround Time: 24 hours from receipt.

Special Instructions: N/A

REJECTION REASONS: QNS, Gross Hemolysis, Gross Lipemia, Contamination, Stability Violation, Expired Container, Incorrect Container

REFERENCE RANGES:

Males & Females (mmol/L)

>= 1 year of age: 3.6 - 5.2

Panic Threshold(s): <= 2.5 mmol/L; >= 6.5 mmol/L for Males & Females >= 1 year of age.