What should be applied to a bone or joint injury if immediate professional medical help will be unavailable for an extended amount of time?

If immediate professional medical help is unavailable for an extended period, you should immobilize the injured bone or joint using a splint or support to prevent further injury. Apply ice packs wrapped in a cloth to reduce swelling and alleviate pain, avoiding direct contact with the skin. Elevate the injured area if possible to minimize swelling. Additionally, monitor for signs of worsening conditions, such as increased pain or numbness, and seek medical attention as soon as it becomes available.