Correct Answer: B

Rationale: The priority nursing intervention for a 3-year-old child with Kawasaki disease is monitoring for coronary artery aneurysms. Kawasaki disease can lead to coronary artery complications, making early detection crucial in preventing serious outcomes. Administering IV immunoglobulin is a standard treatment for Kawasaki disease but does not take precedence over monitoring for potential complications. Encouraging fluid intake and providing nutritional support are important aspects of care but are not the priority when compared to monitoring for coronary artery aneurysms to prevent long-term cardiac issues.

Correct Answer: A

Rationale: The correct answer is A: Incisors. In infants, incisors are usually the first teeth to erupt, typically around 6 months of age. These are the front teeth used for cutting food. Canines (Choice B), upper molars (Choice C), and lower molars (Choice D) typically erupt after the incisors. Canines are sharp teeth used for tearing food, while molars are flat teeth used for grinding food.

Correct Answer: C

Rationale: The correct answer is C, Chickenpox (varicella). Chickenpox is a viral disease characterized by a highly pruritic rash that typically starts on the abdomen and then spreads to other parts of the body, including the face and proximal extremities. It can lead to complications such as pneumonia and encephalitis. Rubella (German measles) presents with a mild rash and swollen lymph nodes; Rubeola (measles) also presents with a rash but starts on the face before spreading downwards; Scarlet fever is caused by Group A Streptococcus bacteria and is characterized by a rash, fever, and sore throat.

Correct Answer: A

Rationale: When assessing a 2-year-old child with abdominal pain and adequate perfusion, it is important to examine the child in the parent's arms. This approach helps reduce the child's anxiety, provides comfort, and can facilitate a more accurate assessment. Palpating the painful area of the abdomen first (choice B) may cause discomfort and increase anxiety in the child. Placing the child supine and palpating the abdomen (choice C) without considering the child's comfort and security may lead to resistance and inaccurate assessment. Separating the child from the parent to ensure a reliable examination (choice D) can further increase anxiety and hinder the assessment process. Therefore, examining the child in the parent's arms (choice A) is the most appropriate and effective approach in this scenario.

Correct Answer: D

Rationale: The most accurate way to determine a therapeutic dose for children is based on their weight rather than age. Weight-based dosing helps ensure that the child receives the appropriate amount of medication for their body size, which is crucial for safety and effectiveness. Age-based dosing can lead to underdosing or overdosing, as children of the same age can have significantly different weights. Choice A is incorrect because even small variations in dosages can have significant effects on a child's health. Choice B is incorrect as acetaminophen can be appropriate when used correctly for fever management in children. Choice C is incorrect as children's weights can vary greatly within the same age group, making weight-based dosing more precise and individualized.