Correct Answer: A

Rationale: The correct first intervention when managing a child with diabetic ketoacidosis is to begin intravenous saline solution to address dehydration and restore electrolyte balance. Rehydration is essential to improve perfusion and correct electrolyte imbalances. Administering insulin without addressing dehydration can potentially lead to further complications. Placing the child on a cardiac monitor or pulse oximetry monitor is important but not the initial priority in managing DKA.

Correct Answer: A

Rationale: Epicanthal folds are a common physical feature seen in individuals with Down syndrome. These are folds of skin that cover the inner corners of the eyes. Webbed neck (Choice B) is associated with Turner syndrome, not Down syndrome. Enlarged head (Choice C) is not a typical physical characteristic of Down syndrome. Polydactyly (Choice D) is the presence of extra fingers or toes, which is not specifically related to Down syndrome.

Correct Answer: C

Rationale: The correct answer is to place a tracheotomy set at the bedside. Acute laryngotracheobronchitis can cause airway obstruction, which may require an emergency tracheotomy. Having the tracheotomy set readily available ensures quick access in case of respiratory distress. Padding the side rails of the crib, arranging for a quiet, cool room, and obtaining a recliner for a parent are important aspects of care but are not the priority when managing a potentially life-threatening airway emergency.

Correct Answer: B

Rationale: The correct answer is B: Long-lasting active immunity is conferred. Tetanus toxoid injection works by stimulating the child's body to produce its antibodies, providing long-lasting active immunity. Choice A is incorrect because passive immunity is not conferred for life; it is temporary and involves receiving antibodies rather than producing them internally. Choice C is incorrect as the immunity conferred by the tetanus toxoid injection is not lifelong natural immunity but rather active immunity stimulated by the body's immune response. Choice D is also incorrect since passive natural immunity is not conferred by the tetanus toxoid injection, and it is not temporary.

Correct Answer: D

Rationale: Initiating pain assessment with a standardized pain scale is crucial in effectively managing pain during a sickle cell crisis. This initial step helps the nurse understand the severity of the pain, which guides subsequent interventions. Administering medications, such as NSAIDs or meperidine, should only be done after a thorough pain assessment to ensure appropriate and individualized treatment. Using guided imagery and therapeutic touch may be beneficial as adjunct interventions, but they should not replace the essential first step of assessing the pain level accurately.