What is the first action a nurse should take for a child exhibiting signs of compartment syndrome?

The first action a nurse should take for a child exhibiting signs of compartment syndrome is to notify the physician. This condition is a medical emergency characterized by increased pressure in a muscle compartment, which can lead to tissue ischemia and potential permanent damage if not addressed promptly.

Once the nurse informs the physician, they can assess the situation further and decide whether immediate intervention, such as a fasciotomy, is necessary to relieve the pressure and restore circulation. Timely communication with the physician is vital to ensure the child receives the appropriate care as quickly as possible.

Approaching the other options, removing the cast may be necessary in some instances, but it is not the immediate priority since the physician's input is crucial to determine the most appropriate intervention. Having the child ambulate would be contraindicated as movement could exacerbate the condition. Elevating the leg on pillows might help with swelling but does not address the underlying issue of compartment syndrome and could delay more critical interventions. Therefore, notifying the physician is the most urgent and appropriate next step in this scenario.