Hormones 2016

Urine and electrolytes
How to prepare for the test
Your health care provider will instruct you, if necessary, to discontinue
drugs that may interfere with the test.
High levels
Drugs that can increase test measurements include -
• Certain antibiotics,
• Certain corticosteroids,
• Diuretics,
• Prostaglandins (ucsfhealth, 2009d).
Low levels
Drugs that can decrease test measurements include -
• Nonsteroidal anti-inflammatory drugs (NSAIDs) (ucsfhealth, 2009d).
Why the test is performed
The test is often used to determine your hydration status and your kidney’s
ability to conserve or remove sodium from the urine (ucsfhealth, 2009d).
Additional conditions under which the test may be performed -
• Acute tubular necrosis,
• Hepatorenal syndrome,
• Medullary cystic kidney disease,
• Glomerulonephritis,
• Prerenal azotemia,
• Uncontrolled high blood pressure (hypertension) (ucsfhealth, 2009d).
Normal Values
Normal values are generally 15 to 250 milliequivalents per liter per day
(mEq/L/day), depending on how much fluid and salt you consume.
Normal value ranges may vary slightly among different laboratories. Talk
to your doctor about the meaning of your specific test results (ucsfhealth,
2009d).
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