Correct Answer: C

Rationale: The correct answer is to hold your breath for 5-10 seconds after inhaling when using a metered-dose inhaler (MDI) for asthma management. This action ensures proper medication absorption in the lungs. Inhaling rapidly (choice A) may cause the medication to impact the mouth/throat rather than the lungs. Exhaling completely before inhalation (choice B) does not optimize medication delivery. Inhaling slowly (choice D) may not allow the medication to reach the lungs effectively.

Correct Answer: B

Rationale: Monitoring cardiac status is crucial during the acute phase of Kawasaki disease because of the potential for coronary artery complications. Acetaminophen may be used for fever management but is not the priority intervention. Antibiotics are not indicated as Kawasaki disease is not caused by a bacterial infection. Providing stimulation in the playroom is important for the child's emotional well-being but does not address the immediate physiological concern of cardiac monitoring.

Correct Answer: B

Rationale: The correct answer is to identify any reversible causes of delirium. Delirium can be caused by various factors such as infections, medications, or metabolic imbalances. Addressing these underlying causes can help resolve delirium. Administering sedative medication (Choice A) can worsen delirium by further altering mental status. Providing a low-stimulation environment (Choice C) is helpful to manage delirium symptoms, but it is not the most important intervention. Increasing environmental stimulation (Choice D) is contraindicated in delirium as it can exacerbate confusion and agitation.

Correct Answer: B

Rationale: The correct safety measure that the nurse should emphasize is to keep oxygen tanks upright and away from heat sources. This is crucial to prevent the risk of fire or explosion. Choice A is incorrect as smoking near oxygen can lead to a fire hazard. Choice C is also incorrect as storing oxygen tanks in enclosed spaces can be dangerous. Choice D, although related to safety, does not address the immediate risk of keeping oxygen tanks away from heat sources.

Correct Answer: C

Rationale: The correct answer is to suction the client when they show signs of irritability. Signs of irritability, such as restlessness or agitation, can indicate the need for suctioning in a client with a tracheostomy. This early indicator suggests that there may be an accumulation of secretions affecting the client's airway. Suctioning should be performed promptly to maintain a clear airway and prevent complications. Choices A, B, and D are incorrect because suctioning should be based on clinical signs and symptoms indicating the need for intervention, rather than a fixed schedule or specific vital sign parameters.