Correct Answer: A

Rationale: The correct answer is A: Fever. Fever is an early indicator of infection as it is the body's natural response to fighting off pathogens. When the body detects an infection, it raises its temperature to create an inhospitable environment for the pathogens. Pain at the surgical site (B) is common post-operatively but may not necessarily indicate infection. Redness at the incision site (C) can be a sign of inflammation but is not specific to infection. Increased heart rate (D) can occur due to various reasons post-operatively, not just infection. Fever is a systemic response and a more reliable early indicator of infection in this context.

Correct Answer: A

Rationale: The correct answer is A: Immobilize the client. This is crucial to prevent further damage to the spinal cord. Moving a client with a suspected spinal cord injury can worsen the injury and lead to permanent damage. Immobilizing the client helps maintain spinal alignment and reduces the risk of paralysis. Providing pain relief (B) and loosening clothing (D) are important but secondary actions. Applying pressure to the chest (C) is not recommended for a suspected spinal cord injury as it can also exacerbate the injury.

Correct Answer: A

Rationale: The correct first action when a client develops a fever after surgery is to administer antipyretics (A). Fever post-surgery can indicate infection, and antipyretics help lower the body temperature. Administering pain medications (B) may mask the fever's underlying cause. Providing fluids (C) is essential but not the priority. Providing wound care (D) is important but comes after addressing the fever. Administering antipyretics promptly helps manage the fever and allows for further assessment and intervention if needed.

Correct Answer: B

Rationale: The correct answer is B: Administer antibiotics. When caring for a client with severe burns, the first priority is to prevent infection, which can be life-threatening. Administering antibiotics helps reduce the risk of infection. Cleansing and dressing the wounds can come after ensuring infection control. Performing a tracheostomy is not typically the first priority unless there are airway concerns. Administering analgesics is important, but it is not the first priority in this case.

Correct Answer: A

Rationale: The correct answer is A: Administer nitroglycerin. The priority nursing action for a client experiencing severe chest pain is to administer nitroglycerin to help dilate the blood vessels and improve blood flow to the heart, reducing chest pain. This action helps to address the immediate issue of chest pain and potential heart damage. Administering morphine (B) may be considered if chest pain persists despite nitroglycerin. Administering oxygen (C) can also be helpful but is not the initial priority. Monitoring blood pressure (D) is important but not the most urgent action in this scenario.