Correct Answer: A

Rationale: The priority nursing diagnosis for a 3-day-old girl with Down syndrome, whose mother had no prenatal care, is imbalanced nutrition, less than body requirements related to the effects of hypotonia. Newborns with Down syndrome often experience feeding difficulties due to hypotonia, which can lead to inadequate nutrition intake. Option B is incorrect because at this age, the infant is not capable of having knowledge deficits related to a genetic disorder. Option C is incorrect as delayed growth and development are not the immediate priority in this scenario. Option D is incorrect as impaired physical mobility is not typically a priority concern for a newborn with Down syndrome.

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: B

Rationale: The correct answer is B: Signs of child abuse. Large welts and scars on a child may be indicative of abuse, making it crucial for the nurse to assess and report any suspicions. Assessing the history of an injury (choice A) may not provide insight into the cause of the welts and scars as effectively as looking for signs of potential abuse. Food allergies (choice C) and recent recovery from chickenpox (choice D) are not directly relevant to the observation of welts and scars on the child's back.

Correct Answer: A

Rationale: For a 4-year-old child scheduled for a myringotomy, explaining the procedure in simple terms is essential in helping the child understand what will happen during the surgery and reducing anxiety. Encouraging fluid intake, allowing the child to play with medical equipment, and using play therapy are not directly related to preparing the child for the myringotomy procedure. Therefore, these options are incorrect and not as beneficial as explaining the procedure in simple terms.

Correct Answer: B

Rationale: The priority nursing intervention for a child with bronchiolitis is providing respiratory therapy. This intervention aims to maintain airway patency, optimize oxygenation, and support effective breathing. Administering bronchodilators, though important, may not be the initial priority as respiratory therapy takes precedence in ensuring adequate oxygenation and ventilation. Monitoring oxygen saturation is crucial but is usually part of the ongoing assessment following the initiation of respiratory therapy. Encouraging fluid intake is essential for hydration but is not the priority intervention when addressing the respiratory distress associated with bronchiolitis.