Test Code LAB107 Osmolality, Plasma or Serum
Reporting Title
Osmolality, Blood
Methodology
Advanced Instruments/Freezing Point Depression
Performing Laboratory
OhioHealth Laboratory Services-RMH, GMC, DH, DMH, MGH, MH, BH, PMH and OBH Core Laboratories
Specimen Requirements
Submit only 1 of the following specimens:
Preferred:
Serum
Draw blood in a gold-top serum gel tube(s). Spin down within 1 hour of draw and send 0.5 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). Spin down within 1 hour of draw and send 0.5 mL of heparinized plasma refrigerated.
Note:
1. Indicate plasma on request form.
2. Label specimen appropriately (plasma).
Specimen Transport Temperature
Refrigerate/Ambient /Frozen OK
Reference Values
275-295 mosm/kg
Day(s) Test Set Up
Monday through Sunday. Continuously
Test Classification and CPT Coding
83930