24-Hour Urine Collection Test
What is a 24-hour urine collection test?
Why would a doctor recommend a 24-hour urine collection test?
What does a 24-hour urine collection test involve?
How long is the recovery after a 24-hour urine collection test?
In this test, the patient's urine is collected over a 24-hour period, and tested for the amount of hormones in the urine.
Doctors use 24-hour urine collection tests to measure the levels of various hormones in a patient's body. If a doctor suspects a patient may have Cushing's syndrome, a condition in which the adrenal glands produce too much cortisol, the doctor will test the collected urine for cortisol. More than 50??100 micrograms of cortisol a day for an adult suggest the patient may have Cushing's syndrome.
The urine collection is done at home. Begin by urinating into the toilet when you get up in the morning, and make a note of the time of day. For the next 24 hours, you will collect all urine in a special container. Every time you use the bathroom, urinate into a large cup, and pour the urine into the special container. Urinate into the cup before having a bowel movement to avoid losing urine you might pass during the bowel movement. The special laboratory container needs to be refrigerated during the test.
Exactly 24 hours after you began the test, urinate one last time and pour the urine into the container. Label and return the container to the laboratory as you have been instructed.
If you forget to collect all of your urine, or otherwise do the test improperly, you will need to discard the urine you have collected and begin again the next day.
You can maintain your normal activities during the length of the test. The test has no recovery period.
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