What action should a nurse take to prevent complications in a child who has been in Buck's traction for 2 days?

Monitoring pulses in the affected leg every 4 hours is crucial for preventing complications in a child undergoing Buck's traction. This practice is essential for assessing the adequacy of blood flow to the extremity, which is at risk for complications such as circulatory impairment due to the traction. Regularly checking for pulses allows the nurse to identify any changes in circulation, such as diminished blood flow or signs of compartment syndrome, which can occur with prolonged traction. Early detection of such issues enables timely intervention, helping to prevent further complications or potential permanent damage to the leg.

In this context, maintaining vascular integrity is a primary nursing concern, especially considering that Buck's traction is often used for femur fractures in children, where monitoring for complications is vital for optimal recovery.