Correct Answer: C

Rationale: In a pediatric patient with an unconscious state, a respiratory rate of 8 breaths/min, and a heart rate of 50 beats/min, the appropriate management involves chest compressions, artificial ventilations, and rapid transport. These signs indicate severe respiratory and circulatory compromise, requiring immediate intervention to support breathing and circulation. Choice A (100% oxygen via a non-rebreathing mask) is not sufficient in this critical situation as the child requires more than just oxygen supplementation. Choice B (positive pressure ventilations with a BVM device) may be needed, but chest compressions are crucial in this scenario due to the presence of bradycardia. Choice D (back blows and chest thrusts) are not indicated for an unconscious child with respiratory and circulatory compromise; instead, immediate chest compressions are necessary to provide circulatory support.

Correct Answer: B

Rationale: The correct answer is to apply topical corticosteroids as prescribed. Atopic dermatitis is a chronic inflammatory skin condition that can be managed with topical corticosteroids to reduce inflammation and itching. While avoiding triggers that cause flare-ups is important in managing atopic dermatitis, the primary treatment approach involves using prescribed medications like corticosteroids. Using a soft toothbrush for oral care and avoiding contact with sick individuals are not directly related to managing atopic dermatitis and are not the priority discharge teachings in this case.

Correct Answer: A

Rationale: Trisomy 21, also known as Down syndrome, is caused by nondisjunction, which is an error in cell division that leads to the presence of an extra chromosome 21. This additional chromosome alters the normal genetic makeup, resulting in the characteristics associated with Down syndrome. Therefore, the correct answer is nondisjunction (Choice A). Choices B, C, and D are incorrect because Trisomy 21 is not caused by X-linked recessive inheritance, genomic imprinting, or autosomal dominant inheritance. Understanding the specific genetic mechanism involved in Trisomy 21 is crucial for grasping the basis of this chromosomal disorder.

Correct Answer: A

Rationale: The American Academy of Pediatrics recommends the intramuscular polio vaccine because it has a better safety profile compared to the oral vaccine. Choice B is incorrect because the AAP specifically recommends the intramuscular vaccine over the oral vaccine. Choice C is incorrect as cost is not the primary reason for preferring the intramuscular vaccine. Choice D is incorrect as the recommendation is based on safety rather than the immunocompromised status of the infant or family members.

Correct Answer: B

Rationale: A macule is defined as a flat, discolored area on the skin that is different from surrounding tissue due to a change in color. In this case, the baby has a flat, discolored area on the skin, which fits the description of a macule. A papule is a small, raised solid bump, a vesicle is a small fluid-filled blister, and a scale is a flake of skin that is often dry and rough. Therefore, choices A, C, and D do not accurately describe the flat, discolored area on the baby's skin, making them incorrect.