Final answer:
The priority in a neurovascular check for tissue perfusion in a child with an arm cast is to check the peripheral pulse in the affected arm option (4) to ensure proper blood flow and prevent complications like compartment syndrome.
Step-by-step explanation:
When performing a neurovascular check for tissue perfusion in a child with an arm cast, the priority is to check the peripheral pulse in the affected arm. The purpose is to evaluate the blood flow distal to the cast, ensuring that circulation is not compromised.
Checking the temperature, blood pressure, and apical heart rate, while important, is not the primary focus of a neurovascular assessment in this context.
Ensuring that the peripheral pulse is present and normal helps confirm that the limb is receiving adequate blood supply and that the nerves are not being damaged. This is essential in preventing potential complications such as compartment syndrome, where increased pressure within the muscles can lead to severe tissue damage.
Prompt detection and intervention are crucial in maintaining the child's limb function and overall well-being.