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Test Code NA Sodium, Plasma or Serum

Methodology

Electrical Potential via Ion-Selective Electrode (ISE)

Performing Laboratory

Aspen Valley Hospital

Physician Office Specimen Requirements

Submit only 1 of the following specimens:

 

Preferred:

Plasma

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

Specimen:  2 mL (minimum volume:  0.5 mL) of lithium heparin plasma
Transport Temperature:  Ambient
Collection Instructions:  Spin down immediately and send entire tube to laboratory. If there is a delay in transport of >8 hours, send specimen refrigerated.

Note:  1. Indicate plasma on request form.
2. Label specimen appropriately (plasma).

 

Alternate:

Serum
Container/Tube:  Gold-top serum gel tube(s) or orange-top tube(s) - Plain, red-top tube is also acceptable.

Specimen:  2 mL (minimum volume:  0.5 mL) of serum
Transport Temperature:  Ambient

Collection Instructions:  Allow specimen to clot for approximately 10 minutes and spin down. If drawing gold-top serum gel tube, send entire tube to laboratory. If drawing orange-top tube or plain, red-top tube, remove serum and place in separate plastic vial. If there is a delay in transport of >8 hours, send specimen refrigerated.

Note:  1. Indicate serum on request form.
2. Label specimen appropriately (serum).

Reference Values

134-142 mmol/L

Critical values (automatic call-back):  <125 mmol/L or >150 mmol/L

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

84295