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. Pertussis vaccination should begin at which age?

Correct answer: B

Rationale: The DTaP vaccine, which includes pertussis, is typically started at 2 months of age as part of the recommended immunization schedule.

3. During an otoscopic examination on an infant, in which direction is the pinna pulled?

Correct answer: C

Rationale: For infants, the pinna is pulled down and back to straighten the ear canal and allow proper visualization of the tympanic membrane during otoscopic examination.

4. What do mortality statistics describe?

Correct answer: B

Rationale: Mortality statistics describe the number of individuals who have died over a specific period, providing insight into public health concerns.

5. The parents of a child with sickle cell anemia ask why their child did not have a sickle cell crisis until he was approximately 6 months old. How should the nurse respond?

Correct answer: C

Rationale: The correct answer is C. Fetal hemoglobin (HbF) is present in high levels during early infancy, inhibiting sickling unlike adult hemoglobin (HbS). As the levels of HbF decrease and HbS increases, the risk of sickling and crises becomes more pronounced, typically after 6 months of age. Choice A is incorrect because it assumes the crisis went unnoticed, which is not supported by medical knowledge. Choice B is incorrect as it questions the child's diagnosis rather than explaining the phenomenon of delayed crises. Choice D is incorrect as it does not provide the parents with the necessary information regarding their query.

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