Osmolality is a fundamental measurement of the total solute concentration of body fluids, including but not limited to, whole blood, serum, plasma, urine, and stool. It is a valuable clinical tool in the diagnosis and treatment of patients.

Osmolality is a quick and effective test to help:

  • Evaluate the body’s water balance and its ability to produce and concentrate urine
  • Investigate low sodium levels (hyponatremia)
  • Detect the presence of toxins in the body
  • Monitor the electrolyte balance of patients receiving osmotically active drug therapies (e.g. mannitol used to treat cerebral edema).

It can also help monitor the effectiveness of a treatment or a condition found to be adversely affecting a person’s osmolality.