Which of the following instructions must be followed to prepare a patient for indirect calorime-try?
1. Suction the patient 30 min before the test.
2. Fasting 10 hr before test.
3. Avoid physical activity 4 hr before the test.
4. 24-hr urine urea nitrogen collection.
a. 1 and 2 only
b. 2, 3, and 4 only
c. 4 only
d. 3 and 4 only
ANS: B
Fasting in required because if feeding in continued result will reflect the patient's energy ex-penditure in response to feeding and may be high if patient is being overfed. It may also register high if there has been recent physical activity. The UUN collection is used if determination of carbohydrate, fat, and protein utilization is desired.
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