Test Code NA.1 SODIUM LEVEL

Methodology

Potentiometric, Direct

Useful for assessing acid-base balance, water balance, water intoxication, and dehydration.

Submit only 1 of the following specimens:

Preferred:

Serum

Serum Gel Tube

Container/Tube: Serum gel tube(s)
Specimen Volume: 1 mL (minimum volume: 0.5 mL) of serum

Collection Instructions: Spin down within 4 hours of draw.

Note: Label specimen appropriately (serum).

Alternate:

Serum

Plain, Red-Top Tube

Container/Tube: Plain, red-top tube(s)
Specimen Volume: 1 mL (minimum volume: 0.5 mL) of serum

Collection Instructions: Spin down within 4 hours of draw.

Note: Label specimen appropriately (serum).

Plasma

Container/Tube: Green-top (lithium heparin) tube(s)

Specimen Volume: 1 mL (minimum volume: 0.5 mL) of plasma

Collection Instructions: Spin down within 4 hours of draw.

Note: Label specimen appropriately (plasma).

Monday through Sunday

125-155 mmol/L

Critical values (automatic call-back): <120 mmol/L or >155 mmol/L

Logan Health Medical Center-Chemistry

84295

Refrigerate