What should a nurse do for a newborn after injury to the arm?

Immobilizing the arm across the abdomen is crucial for a newborn who has sustained an injury. This action helps to stabilize the injured area, minimizing movement to prevent further injury or distress. In newborns, whose bones and soft tissues are still developing and are fragile, immobilization is key to allowing healing while also providing comfort and reducing pain.

Additionally, keeping the arm close to the body allows for easier monitoring of any changes in condition and can help the caregiver or healthcare provider respond quickly if any complications arise. While other options may contribute to the overall care of the newborn, immediate immobilization of the injured limb is the priority to ensure the injury does not worsen.