Tests & Procedures

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Item
Osmolality (Blood)
This test measures the concentration of dissolved particles, or osmolality, in your blood.
Osmolality (Stool)
This test measures the concentration, or osmolality, of certain particles in a sample of your watery stool. The test is used to find out why you have chronic diarrhea.
Osmolality (Urine)
This test measures the concentration of particles in your urine. It finds out whether your electrolyte balance is normal and whether your kidneys are working properly.
Ova and Parasites (Stool)
This test looks for parasites and their larvae or eggs in a sample of your stool.
Oxalate (Urine)
This test checks for the chemical oxalate in your blood. High levels of this substance can make it more likely that you will develop kidney stones.
Oximetry
Oximetry is a procedure used to measure the oxygen level—or oxygen saturation—in the blood.