The University of Iowa (UIHC)
Department of Pathology
LABORATORY SERVICES HANDBOOK

Osmolality
Order Code: OSMS
Epic Lab Code: LAB107
Order Form: A-1a General Lab or Epic Req 		  Chemistry
6240 RCP
356-3527 
Specimen:
 
Plasma
Collection Medium:
Plasma separator tube 


Alternate
Collection Media:


Call laboratory for additional acceptable specimen collection 
containers.


Minimum:


3 ml whole blood in light green tope tube or 2 microtubes for pediatric 
patients


Testing Schedule:


24 hrs/day, 7 days a week, including holidays.


Analytic Time:


2 hours (upon receipt in laboratory)


Reference Range:


Adult males 280-300 mOsm/kg; adult females 275-295 mOsm/kg


Methodology:


Freezing Point Depression


CPT Code:


83930


 


See Additional Information:
Osmolality Gap Calculator




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Updated: 01/23/2008

Note: The information contained in this handbook is  
            for use by personnel of University of Iowa Health Care. 
            No other use is implied or intended.