Urine Osmolality Test
Alternate Names : Urine Osmolality
What do the test results mean?
Normally, urine has an osmolality of 50
to 1,400 mOsm/kg H20 (milliosmoles per kilogram of water).
Abnormally high osmolality may be a sign of:
Addison's disease, which is caused by a deficiency of hormones produced in the adenal glands
irregularities in the secretion of antidiuretic hormone, or ADH. ADH helps the
kidneys put water back into the bloodstream.
congestive heart failure, or a weakened heart that fails to pump enough blood to body cells
Abnormally low osmolality may be a sign of:
aldosteronism, a condition in which a person has too much of the hormone
aldosterone, which helps the body break down and use sodium, chloride, and potassium
diabetes insipidus, a disease which causes increased thirst and urination
excessive fluid intake, which occurs when a person drinks too much fluid
kidney damage or disease
pyelonephritis, a kidney inflammation usually caused by an infection
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