A nurse is collecting data from a client who has a long leg cast on his left leg. Which of the following findings is the priority?

A. One fingerbreadth of space between the cast and the skin: Adequate spacing indicates proper cast fit and helps prevent pressure sores, but it does not signal an immediate threat to circulation or tissue viability. B. Ecchymosis on the inner left thigh: Mild bruising can occur from initial injury or cast application. While it should be monitored, it is not as urgent as compromised blood flow. C. Diminished pulses on the affected extremity: Weak or absent pulses indicate impaired arterial circulation, which can lead to ischemia, tissue necrosis, or compartment syndrome. This finding requires immediate assessment and intervention to prevent permanent injury. D. Client report of muscle spasms of the left leg: Muscle spasms can be uncomfortable but are typically not life- or limb-threatening. They are addressed after ensuring adequate circulation and neurovascular status.