Which early symptom should a client in an arm cast report to monitor for compartment syndrome?

Paresthesia, which includes symptoms like numbness and tingling, is a critical early indicator of compartment syndrome. This condition occurs when there is increased pressure within a closed muscle compartment, leading to impaired blood flow and nerve function. Due to the increased pressure, nervous tissue can become compromised, resulting in sensations of tingling or numbness as the first sign of nerve involvement. Recognizing paresthesia early allows for timely assessment and intervention, potentially preventing more severe complications such as permanent nerve damage or muscle necrosis.

The other symptoms, such as pain that increases with limb elevation, pallor and coolness to the distal limb, and cyanosis of fingers, may also indicate various issues, including worsening compartment syndrome. However, paresthesia is particularly notable for being an early sign that can help in making quicker clinical decisions. Monitoring for this symptom can lead to earlier detection and management of compartment syndrome, improving the overall outcome for the patient.