The nurse is collecting a patient's 24-hour urine output for the urine urea nitrogen test. The purpose of this test is to determine the patient's
1. nitrogen balance.
2. kidney function.
3. fluid status.
4. blood volume.
1
Rationale: In the high acuity patient, nitrogen balance may be evaluated as an indicator of protein status. Nitrogen balance is the difference between nitrogen output and nitrogen intake, and is measured by a test called the urine urea nitrogen test. The urine urea nitrogen test results would be altered in a patient with kidney failure. This test is used to measure nitrogen balance and not kidney function, fluid status, or blood volume.
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