melena the passage of black tarry stools suggests bleeding from which source
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Nursing Elites

ATI RN

ATI Nursing Care of Children 2019 B

1. Melena, the passage of black, tarry stools, suggests bleeding from which source?

Correct answer: B

Rationale: Melena indicates bleeding from the upper GI tract. The black, tarry appearance of the stool results from the partial digestion of blood as it passes through the intestines, typically originating from sources like the stomach or duodenum. Lower GI bleeding usually presents as bright red blood in the stool, originating from sources like the colon or rectum. Choices A, C, and D are incorrect because melena specifically points to upper GI bleeding rather than issues in the perianal/rectal area, lower GI tract, or hemorrhoids/anal fissures.

2. What physiologic state(s) produces the clinical manifestations of nervous system stimulation and excitement, such as overexcitability, nervousness, and tetany?

Correct answer: D

Rationale: Both metabolic and respiratory alkalosis can cause overexcitability and nervous system stimulation due to a decrease in ionized calcium levels, which can cause symptoms such as tetany and paresthesias. Acidosis typically has the opposite effect, leading to depression of the nervous system.

3. The clinic nurse is assessing a child with a heavy ascariasis lumbricoides (common roundworm) infection. Which assessment findings should the nurse expect?

Correct answer: D

Rationale: A heavy roundworm infection can cause anemia, anorexia, irritability, and an enlarged abdomen due to the worms’ effects on nutrient absorption and intestinal function.

4. What information should be given to the parents of a 12-month-old child regarding appropriate play activities for this age?

Correct answer: A

Rationale: Large push-pull toys are suitable for a 12-month-old as they encourage gross motor skills and physical activity, which are crucial for their development at this age.

5. 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.

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