Test Code LAB114 Potassium, Plasma or Serum
Reporting Title
Potassium
Methodology
Roche Diagnostics, Ion-Selective Electrode (ISE) - RMH, BH, DH, DMH, GCMH, GMC, GMH, HMH, MGH, MH, OBH, PMH, SH, WECC Core Laboratories
Useful in diagnosis and treatment of electrolyte imbalance.
Performing Laboratory
OhioHealth Laboratory Services - RMH, BH, DH, DMH, GCMH, GMC, GMH, HMH, MGH, MH, OBH, PMH, SH, WECC Core Laboratories
Specimen Requirements
Collection Instructions:
1. Serum and Plasma gel tubes should be centrifuged within 2 hours of collection.
2. Red-top tubes should be centrifuged and aliquoted within 2 hours of collection.
Submit only 1 of the following specimens:
Preferred:
Serum
Draw blood in a gold-top serum gel tube(s). (Hemolyzed specimen is not acceptable.) Spin down and send 1 mL of serum refrigerated.
Note:
1. A speckled-top serum gel tube (s) or a plain, red-top tube(s) is also acceptable.
2. Indicate serum on request form.
3. Label specimen appropriately (serum).
Alternate:
Plasma
Draw blood in a mint green-top (heparin) gel tube(s). (Hemolyzed specimen is not acceptable.) Spin down and send 1 mL of heparinized plasma refrigerated.
Note: 1. Indicate plasma on request form.
2. Label specimen appropriately (plasma).
Specimen Stability Information
Specimen Type | Temperature | Time |
---|---|---|
Serum or plasma | Refrigerated | 14 days |
Ambient | 14 days | |
Frozen | Stable |
Specimen Transport Temperature
Refrigerate/Ambient OK/Frozen OK
Reference Values
0-31 days: 3.7-5.9 mmol/L
32 days-1 year: 4.1-5.3 mmol/L
2-12 years: 3.4-4.7 mmol/L
≥13 years: 3.5-5.1 mmol/L
Critical values 0-31 days: <2.8 mmol/L or >6.5mmol/L >31 days: <2.8 mmol/L or >6.0 mmol/L
Alerting category: Always called within 1 hour
Day(s) Test Set Up
Monday through Sunday; Continuously
Test Classification and CPT Coding
84132