Does this test have other names?
What is this test?
This test measures the amount of chloride in your urine.
Your body tries to keep its acid-base (pH) level in balance. But certain conditions can cause an imbalance. If your body tissues become too alkaline, you may get metabolic alkalosis. Alkaline is the opposite of acidic.
You can get metabolic alkalosis from taking medicines that make you urinate more (diuretics). It can also happen after you have been vomiting. Or it can happen if you've had the contents of your stomach suctioned.
It can also be caused by a rare medical condition, such as Bartter syndrome or Gitelman syndrome. It can also be caused by having low levels of potassium.
If you have metabolic alkalosis, seeing how much chloride is in your urine gives your healthcare provider more information about your condition.
Why do I need this test?
You may have this test if your healthcare provider thinks you have metabolic alkalosis. Signs and symptoms include:
Bartter syndrome and Gitelman syndrome can both cause metabolic alkalosis. They also affect your kidneys. Bartter syndrome is usually diagnosed in early childhood. Gitelman syndrome is usually diagnosed during adolescence or in adulthood.
Signs and symptoms of Bartter syndrome include:
Infants with this condition may have failure to thrive.
Symptoms of Gitelman syndrome include:
Muscle cramps in your arms and legs
Fatigue, sometimes severe
Urinating more than normal, and urinating at night
Pain in your belly (abdomen)
Craving for salt
What other tests might I have along with this test?
Your healthcare provider may also order other tests that measure substances in your urine or blood. These include:
Sodium in your urine
Potassium in your urine
pH level of your urine
Electrolytes in your blood
Arterial blood gases
Other substances in your blood, including albumin, blood urea nitrogen, calcium, creatinine, glucose, and phosphate
What do my test results mean?
Many things may affect your lab test results. These include the method each lab uses to do the test. Even if your test results are different from the normal value, you may not have a problem. To learn what the results mean for you, talk with your health care provider.
Results are given in milliequivalents per liter (mEq/L). Normal results range from 25 to 40 mEq/L.
If your levels are below 25 mEq/L, you may have a lack of chloride in your diet. It may also mean that you have been vomiting or had medical suctioning of your stomach contents. It may also mean that you have used diuretics in the past.
If your levels are higher than 40 mEq/L, you may have:
Higher levels of chloride may also be caused by recently taking diuretics.
How is this test done?
This test requires a urine sample. Different types of urine tests use different collection methods. Your healthcare provider will tell you how to collect the sample for this test.
Does this test pose any risks?
This test poses no known risks.
What might affect my test results?
Taking diuretics or vomiting can affect your results.
How do I get ready for this test?
Tell your healthcare provider if you have vomited recently. In addition, be sure your doctor knows about all medicines, herbs, vitamins, and supplements you are taking. This includes medicines that don't need a prescription and any illicit drugs you may use.
- Hanrahan, John, MD
- Sather, Rita, RN