Osmolality, Fecal

Abbrev Code:SOSMO   
Order Code:LAB201Order Name:Osmolality Stool
Methodology:Freezing point depression
CPT Codes: 83935 x1
Turnaround Time:Specimens are sent to the reference laboratory Mon-Sat; results are reported within 2 days.

Collection Instructions

Specimen:Feces, liquid or semi-liquid
Optimal Volume:Entire collection
Minimum\Peds Volume:0.5 mL
Container:Plastic leakproof container, sterile
Causes for Rejection:Non-liquid stools, specimens in media of preservatives

Processing and Shipping

Specimen Processing:Aliquot 5 mL. 0.5 mL minimum. Stool must be liquid. Do not add saline or water to liquify sample. Freeze within 2 hours.
Shipping Instructions:Ship on dry ice.
Stability:Order a collection on timed specimens. If specimen is not liquid, cancel.
Test Performed at or Referral Lab Lab Sendouts  (ARUP)
Referral Lab number:98122


Reference Range:0-16 y: 271-296 mOsm/kg; 17 y and older: 280-303 mOsm/kg
Use:To help separate osmotic diarrhea from secretary diarrhea.

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