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Test Code K Potassium, Plasma or Serum

Additional Codes

LAB114

Methodology

Used to monitor electrolyte balance.

Performing Laboratory

St. Mary's Regional Medical Center-Chemistry

 

CPT: 84132

Specimen Requirements

Submit only 1 of the following specimens:

 

Plasma

Container/Tube: Light green-top (lithium heparin) tube

Specimen: 1 mL of lithium heparin plasma

Transport Temperature: Ambient

Collection Instructions: Hemolyzed specimen will cause falsely elevated values.

 

Serum

Container/Tube: Plain, red-top tube or serum gel tube

Specimen: 1 mL of serum

Transport Temperature: Ambient

Collection Instructions: Hemolyzed specimen will cause falsely elevated values.

Reference Values

0-1 week:                  3.2-5.7 mmol/L

1 week-1 month:     3.4-6.2 mmol/L

1-6 months:             3.5-5.8 mmol/L

6 months - 1 year:  3.5-6.3 mmol/L

>1 year:                     3.4-5.1 mmol/L

 

Call criteria (automatic call-back): <3.0 mEq/L or >6.0 mEq/L

Day(s) Test Set Up

Monday through Sunday

Available STAT