Sign in →

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