Correct Answer: A

Rationale: The correct answer is A: Risk for impaired skin integrity due to cast and location. When caring for a child with a long-leg hip spica cast, the priority nursing diagnosis is the risk for impaired skin integrity. This is because the child's limited mobility and the pressure from the cast can lead to skin breakdown and complications. Choice B is incorrect as while education is essential, it is not the priority when immediate physical risks are present. Choice C is incorrect because while immobility can impact development, the immediate concern is preventing complications from the cast. Choice D is incorrect as it focuses on self-care deficits rather than the physical risk of skin integrity issues.

Correct Answer: B

Rationale: The correct answer is B. Urticaria is a type I hypersensitivity reaction, not type IV. When triggered, histamine release leads to vasodilation, causing characteristic wheals. Wheals are typically followed by erythema. The rash in urticaria is pruritic and does blanch with pressure, unlike the nonpruritic rash described in choice D. Therefore, the most appropriate description of urticaria includes histamine release and vasodilation, as stated in choice B.

Correct Answer: D

Rationale: In a 3-year-old child presenting with sudden respiratory distress and no history of recent illnesses or fever, foreign body airway obstruction should be suspected. Foreign body airway obstruction commonly leads to acute respiratory distress without preceding symptoms. Croup (Choice A) typically presents with a barking cough and stridor. Epiglottitis (Choice B) often presents with high fever, drooling, and a muffled voice. Lower respiratory infection (Choice C) may manifest with symptoms such as cough, fever, and respiratory distress, but the sudden onset without fever or recent illness suggests a more acute event like foreign body airway obstruction.

Correct Answer: B

Rationale: Upright positioning is the optimal intervention to promote maximum chest expansion in a child with Duchenne muscular dystrophy. By placing the child in an upright position, gravity can assist in expanding the chest cavity, facilitating better lung expansion and improving breathing efficiency. Deep-breathing exercises may be beneficial but are not as effective in maximizing chest expansion as upright positioning. Coughing and chest percussion focus more on airway clearance and are not directly aimed at promoting chest expansion.

Correct Answer: A

Rationale: When a pregnant woman experiences a seizure, it is crucial to transport her on her left side. This position helps to improve blood flow to the fetus by preventing compression of the inferior vena cava, reducing the risk of further complications. Placing her in the prone position (lying face down) or supine position (lying on her back) may compromise blood flow to the fetus and lead to adverse outcomes. Similarly, transporting her in a semi-sitting position may not provide the optimal circulation needed for both the woman and the fetus during this critical situation.