Correct Answer: A

Rationale: The correct answer is A: Burn units. Burn units were identified as the first critical care units due to the complex and intensive care required by burn patients. These units were established to provide specialized care for burn victims, including wound management, infection control, and fluid resuscitation. Summary: - Burn units were the first critical care units due to the specialized care needed for burn patients. - Coronary care units focus on cardiac conditions, not the first identified critical care units. - Recovery rooms are for post-operative care, not specifically for critical care. - Neonatal intensive care units are specialized for newborns, not the first critical care units.

Correct Answer: C

Rationale: The correct answer is C: “The fistula will be usable in about 4 to 6 weeks.” The rationale for this is that an arteriovenous fistula typically requires 4 to 6 weeks to mature and be ready for use. During this time, the fistula develops the necessary blood flow for efficient dialysis. Choice A is incorrect because immediate use of the fistula is not recommended as it needs time to mature. Choice B is incorrect as it underestimates the time needed for the fistula to heal and mature. Choice D is incorrect as the usability of the fistula is not dependent on the manufacturer but rather on the patient's individual healing process.

Correct Answer: A

Rationale: Step 1: Environmental manipulation involves adjusting factors like lighting, noise levels, and room temperature to create a soothing environment, which can help reduce pain and anxiety. Step 2: By controlling the physical surroundings, patients may feel more comfortable and relaxed, leading to improved pain management and reduced anxiety levels. Step 3: Explanations of monitoring equipment and guided imagery are not directly related to environmental changes that can impact pain and anxiety. Step 4: Music therapy, while beneficial for some patients, is not categorized as environmental manipulation.

Correct Answer: A

Rationale: The correct answer is A: Basilar skull fracture. Endotracheal intubation is recommended over nasotracheal intubation to avoid the risk of further damaging a basilar skull fracture. Nasotracheal intubation can potentially cause further injury due to the passage of the tube through the nasal cavity, which could exacerbate a basilar skull fracture. Summary of other choices: B: Cervical hyperextension - Not directly related to the choice between endotracheal and nasotracheal intubation. C: Impaired ability to "mouth" words - Not a significant factor in determining the choice of intubation method. D: Sinusitis and infection - While nasotracheal intubation can potentially lead to sinusitis and infection, the primary concern in this scenario is the risk of aggravating a basilar skull fracture.

Correct Answer: A

Rationale: The correct answer is A: Assess the patient's current vital signs. The nurse's first action should be to gather objective data to assess the patient's condition and determine the urgency of the situation. Vital signs, including temperature, heart rate, blood pressure, and respiratory rate, provide crucial information for the initial assessment. This will help the nurse identify any signs of sepsis, shock, or other serious conditions that require immediate intervention. The other choices are incorrect because: B: Giving acetaminophen without assessing the patient's vital signs and determining the cause of the symptoms could mask important clinical information and delay appropriate treatment. C: While obtaining a urine sample may be necessary later to rule out a urinary tract infection, it is not the most immediate priority in this case. D: Delaying the patient's assessment and care based on estimated wait times is not appropriate when the patient presents with potentially serious symptoms. Immediate evaluation is required in this scenario.