A nurse is caring for a client who has a cast due to a compound fracture of the right ankle. Which of the following findings requires immediate intervention?

Choice A reason: Localized stabbing pain upon movement can occur with fractures and casts, but pain alone is not always an emergency unless it is severe, unrelieved, or disproportionate to the injury. Pain is expected in the healing process and can often be managed with analgesics. Choice B reason: Pruritus under the cast is a common complaint due to skin dryness and irritation. While uncomfortable, it is not dangerous and does not require immediate intervention. Choice C reason: Edema when the leg is in a dependent position is expected after a fracture and casting. Elevation of the limb usually helps reduce swelling. This is not an urgent finding unless swelling is severe and compromises circulation. Choice D reason: Paresthesia of the distal extremity indicates impaired circulation or nerve compression, which can be a sign of compartment syndrome. This is a medical emergency because it can lead to permanent nerve and muscle damage if not treated promptly. Immediate intervention is required, making this the correct answer.