Nitrogen balance testing is planned for a client. What instruction to the staff caring for this client is essential?
1. Remove the client's oxygen cannula 10 minutes prior to the test.
2. Accurate measurement of food intake is very important.
3. All urine output should be collected for 48 hours.
4. Keep the client NPO beginning at midnight before the test.
Correct Answer: 2
Rationale 1: The presence of an oxygen cannula is not associated with preparation for the test.
Rationale 2: Nitrogen balance is determined by comparing the grams of protein taken in to the urinary nitrogen output for 24 hours. Accurate food intake is essential.
Rationale 3: Urine output is not collected for 48 hours for this test.
Rationale 4: The client must have protein intake during the testing time.
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