which parameter correlates best with measurements of total muscle mass
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Nursing Elites

ATI RN

ATI Nursing Care of Children

1. Which parameter correlates best with measurements of total muscle mass?

Correct answer: D

Rationale: Upper arm circumference correlates best with total muscle mass because it includes both muscle and fat components, making it a reliable indicator of muscle mass.

2. The charge nurse in the pediatric unit is teaching nursing students about pyloric stenosis. A student asks what causes pyloric stenosis. How should the nurse respond?

Correct answer: B

Rationale: Pyloric stenosis is caused by the hypertrophy (thickening) of the circular muscle of the pylorus, leading to obstruction. Choice A is incorrect as it describes intussusception, not pyloric stenosis. Choice C is incorrect as a relaxed cardiac sphincter is related to gastroesophageal reflux. Choice D is incorrect as it describes Hirschsprung's disease, not pyloric stenosis.

3. Rectal temperatures are indicated in which situation?

Correct answer: B

Rationale: Rectal temperatures provide the most accurate measurement of core body temperature and are therefore indicated when accuracy is essential.

4. Which laboratory value at the time of diagnosis should the nurse anticipate would determine the worst prognosis for a child with leukemia?

Correct answer: D

Rationale: A high white blood cell count (leukocytes of 275,000/mcL) at diagnosis is associated with a worse prognosis in leukemia because it indicates a more aggressive disease with a higher tumor burden. Slow response to chemotherapy (choice A) is a consequence of the aggressive disease and not a determining factor at diagnosis. Platelets of 150,000/mcL (choice B) and leukocytes less than 10,000/mcL (choice C) are within normal ranges and not indicative of a worse prognosis in leukemia.

5. The nurse is discussing home care with a mother whose 6-year-old child has hepatitis A. What information should the nurse include?

Correct answer: B

Rationale: Teaching infection control measures is crucial as Hepatitis A is highly contagious, especially in household settings. Proper hand hygiene and avoiding sharing personal items can prevent the spread of the virus within the family. Option A is incorrect because bed rest is not typically required for hepatitis A. Option C is incorrect as the child can return to school once feeling well and no longer contagious, not necessarily after a specific duration. Option D is incorrect because hepatitis A can be transmitted through contaminated food, water, or close personal contact.

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