Children's Mercy Hospitals and Clinics
Name
Potassium, Serum

CMH Lab Section
Chemistry

Specimen Requirements
0.2 ml of blood in a mint green or red top w/ yellow ring gel tube

Availability
Stat, Urgent, Routine

Turn Around Time
Stat: 1 hr Routine: 2-4 hrs

Special Instructions
Free from hemolysis

Methodology
Vitros

Ranges
Age Dependent
0-3mos: 3.5-6.2 mmol/L
>3mos = 3.5-5.2

Critical Values
0-3mos Hemolyzed & Non-hemolyzed: Less than 3.0 or Greater than 7.0
> 3mos Non-Hemolyzed: Less than 3.0 or Greater than 6.5
> 3mos Hemolyzed: Less than 3.0 or Greater than 7.0

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