Description
Why It’s Done:
This test is ordered to:
1. Evaluate Hydration Status:
o Detect dehydration or overhydration.
2. Diagnose Electrolyte Imbalances:
o Identify conditions like hyponatremia or hypernatremia.
3. Assess Kidney Function:
o Help diagnose kidney diseases that affect fluid regulation.
4. Investigate Causes of Symptoms:
o Symptoms such as confusion, seizures, or coma may prompt this test to check for underlying electrolyte or fluid imbalances.
5. Monitor Treatment:
o Track the effectiveness of therapies involving fluids or electrolytes.
Preparation:
• Fasting:
o Usually not required. You may eat and drink normally unless your doctor advises otherwise.
• Medications:
o Inform your doctor about any medications you are taking, as some drugs may affect serum osmolality.
• Hydration:
o Maintain normal hydration status before the test unless instructed to do otherwise.
• Timing:
