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Test Code Osmo, URN Osmolality, Urine or Stool

Performing Laboratory

Memorial Hospital Laboratory- Automated Procedures  304-388-5953       
General Hospital Laboratory 304-388-6244

Specimen Requirements

Urine
3 mL from a random urine collection in a KOVA tube or plastic specimen container

Particulate matter must be removed by centrifugation

 

Stool

Diarrhea stool specimen may be analyzed if properly prepared (ensure specimen is labeld as a stool)

Specimen Rejection

  • Improperly labeled, collected, stored, and transported
  • Quantity not sufficient
  • Specimens containing anti-freeze cannot be performed
  • Ethylene glycol, propylene glycol, acetone and similar compounds interfere by inhibiting freezing

Storage and Stability

Room Temperature 18-24o C 3 hours
Refrigerate 2-8o C 24 hours
Frozen Not acceptable

Reference Values

50-1,400 mOsm/kg

Methodology

Freezing Point Depression

Days Test Set Up and Turnaround

Monday through Sunday, Continuously

AM Collection Expected by 9AM same day
Routine Expected within 24 hrs
Stat Expected within 1 hr
Timed Expected results are test dependant

CPT Coding

83935