Test Code OS Osmolality, Plasma or Serum

Methodology

Freezing Point Thermodynamics

Munson Medical Center Laboratories

Specimen must arrive within 72 hours of draw.

Submit only 1 of the following specimens:

Plasma

Container/Tube: Green-top (heparin) gel tube

Specimen Volume: 0.5 mL of heparinized plasma
Transport Temperature: Refrigerate
Collection Instructions: Forward promptly.

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

Serum
Container/Tube: Gold-top serum gel tube

Specimen Volume: 0.5 mL of serum
Transport Temperature: Refrigerate
Collection Instructions: Forward promptly.

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

270-300 mOsm/kg

Monday through Sunday

83930