ELECTROLYTE; 24-HOUR URINE

What this test checks

Measures total daily sodium, potassium, and chloride in urine.

Why do people get this test?

Used to investigate unusual blood pressure problems, kidney stone tendency, and rare salt-balance disorders.

When you should consider this test

• Hard-to-control blood pressure
• Recurrent kidney stones
• Rare endocrine condition work-up

How to prepare

24-hour urine collection — container provided.