Correct Answer: C

Rationale: The most appropriate technique to use when explaining a central line dressing change to a preschool-age client is to let the child perform a dressing change on a doll. Preschool-age children learn best through play and hands-on activities. Allowing the child to practice on a doll helps them understand the procedure in a non-threatening and interactive way. This technique can reduce anxiety, increase cooperation, and enhance the child's understanding of the dressing change process. Choices A and B do not provide a hands-on approach, which is crucial for preschool-age children. Choice D is incorrect as providing an interactive experience is more effective than just showing pictures or giving verbal instructions.

Correct Answer: A

Rationale: The correct answer is A: 'The child vomits everything.' Vomiting everything is considered a danger sign in a child as it can lead to dehydration and other serious complications. Recognizing this sign early can help in timely intervention and management of the child's condition. Choices B and C are incorrect as diarrhea and headache, while concerning, are not specific danger signs highlighted in the Integrated Management of Neonatal and Childhood Illnesses.

Correct Answer: A

Rationale: Beta-adrenergic agonists like Salbutamol are used to dilate the bronchioles in asthma patients. This action helps in relieving bronchospasms and improving airflow to the lungs, making breathing easier for the individual. While reducing inflammation is an essential part of asthma management, beta-adrenergic agonists primarily work by relaxing the smooth muscles around the airways, leading to bronchodilation. Choices B, C, and D are incorrect because beta-adrenergic agonists are not primarily used to reduce secondary infections, decrease postnasal drip, or directly reduce airway inflammation in asthma patients.

Correct Answer: B

Rationale: The priority nursing diagnosis for a child diagnosed with an ear infection and experiencing nighttime awakenings and crying would be 'Pain related to ear infection.' Pain management is crucial to ensure the child's comfort and well-being, which can also impact their sleep patterns. Addressing the pain as a priority can lead to improved sleep and overall recovery for the child.

Correct Answer: B

Rationale: In situations where a sibling is upset about a family member being hospitalized, suggesting that the sister come to the hospital for a visit can help alleviate her concerns. This allows the sister to see her brother, ask questions, and receive reassurance from seeing him in stable condition. Direct contact and interaction can often provide more comfort and understanding than phone calls or staying at home. Encouraging phone calls (Choice A) might not provide the same level of comfort as a physical visit. While spending extra time with the daughter at home (Choice C) is important, in this scenario, facilitating a visit to the hospital can address the daughter's immediate concerns better. Reminding the parents that it is normal for children to be upset (Choice D) is not as proactive as arranging for the sister to visit her brother.