Correct Answer: A

Rationale: The correct answer is to administer IV fluids. This intervention is the priority as it helps rapidly restore hydration in patients with dehydration by delivering fluids directly into the bloodstream. Monitoring intake and output (choice B) is important but comes after providing immediate fluid resuscitation. Administering oral fluids (choice C) may not be sufficient for a patient with dehydration who requires rapid rehydration. Providing electrolyte replacement (choice D) is essential but often follows fluid resuscitation to correct any electrolyte imbalances resulting from dehydration.

Correct Answer: B

Rationale: The correct answer is B: 'Sleep with the head of your bed elevated.' Elevating the head of the bed helps reduce acid reflux by keeping the head higher than the stomach, preventing stomach acid from flowing back into the esophagus. Choices A, C, and D are incorrect. Avoiding eating small, frequent meals, lying down after eating, and drinking fluids with meals can exacerbate GERD symptoms by increasing stomach acid production and promoting acid reflux.

Correct Answer: D

Rationale: Ambulating the client on the first postoperative day is crucial to prevent complications like deep vein thrombosis and aid in the recovery process. Elevating the legs while in bed can help with circulation but is not as effective in preventing complications related to immobility post-surgery. Repositioning every 2 hours is important for preventing pressure ulcers but does not directly address postoperative care. Maintaining bed rest for the first 24 hours postoperatively can increase the risk of complications associated with immobility, making early ambulation a more appropriate intervention.

Correct Answer: A

Rationale: The correct action for the nurse to take first when a client reports chills during a blood transfusion is to stop the transfusion. Chills can indicate a transfusion reaction, which is a potentially serious situation. Stopping the transfusion immediately is crucial to prevent further complications. Administering acetaminophen or checking the client's blood pressure can come after ensuring the safety of the client by stopping the transfusion. Notifying the provider is important, but the immediate priority is to stop the transfusion.

Correct Answer: B

Rationale: In chronic obstructive pulmonary disease, there is impaired gas exchange, leading to retention of carbon dioxide (CO2) and subsequent respiratory acidosis. A PaCO2 of 55 mm Hg is higher than the normal range (35-45 mm Hg) and is indicative of respiratory acidosis in COPD. Choices A, C, and D are not typically associated with COPD. PaO2 may be decreased, HCO3 may be elevated to compensate for acidosis, and pH may be lower than 7.35 due to respiratory acidosis in COPD.