Test code links throughout this Guide refer to the corresponding test in the User's Guide. The measured osmolality should approximate plasma osmolality if the specimen was processed correctly.
O suggests osmotic diarrhea.
Stool specimens must be liquid. Do not add saline or water to liquify sample. The stool should be spun and then the aliquot should be removed and analyzed immediately. If a prompt analysis is not possible, the aliquot needs to be frozen. Watery diarrhea and stool osmolality.