Correct Answer: C

Rationale: Tetralogy of Fallot is characterized by a combination of four specific cardiac defects: right ventricular hypertrophy, ventricular septal defect, pulmonic stenosis, and overriding aorta. Choice A is incorrect as it includes mitral valve stenosis, which is not typically part of tetralogy of Fallot. Choice B describes transposition of the great arteries rather than tetralogy of Fallot. Choice D includes an atrial septal defect, which is not part of the classic presentation of tetralogy of Fallot.

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: D

Rationale: Toddlers subjected to prolonged hospitalization with limited parental visits often exhibit a limited emotional response to the environment. This behavior is a common coping mechanism in young children facing such situations. While cheerful interactions with staff members (choice A) may occur occasionally, the overall response tends to be subdued. Indications of sadness throughout the day (choice B) and excessive crying when parents are not present (choice C) are less typical in this scenario, as the child may have learned to suppress emotions due to the challenging circumstances.

Correct Answer: B

Rationale: Childhood obesity is a prevalent issue in children with Down syndrome due to factors such as decreased physical activity, slower metabolism, and potential overeating tendencies. Addressing obesity is crucial to promoting healthy lifestyles and preventing associated health complications. Rickets, a condition caused by a deficiency of vitamin D, is not commonly associated with Down syndrome. While anemia can occur in individuals with Down syndrome, obesity is a more common concern. Rumination, the regurgitation of food without nausea, is not a typical nutritional problem in children with Down syndrome.

Correct Answer: A

Rationale: In this scenario, the infant is showing signs of shock with increased work of breathing. Lowering the extremities helps improve venous return to the heart, cardiac output, and oxygenation by reducing the pressure on the diaphragm. This action can alleviate the respiratory distress and is a critical step to take in a child with signs of shock. Beginning positive pressure ventilations (Choice B) should be considered if the infant's respiratory distress worsens despite lowering the extremities. Placing a nasopharyngeal airway and increasing oxygen flow (Choice C) may not directly address the increased work of breathing or the underlying shock condition. Listening to the lungs with a stethoscope (Choice D) may provide information on lung sounds but does not address the immediate need to improve breathing in a child with signs of shock.