--One needs to assess the extent of of injury. A careful exam of the upper extremity must be performed to evaluate for neurovascular compromise. Are pulses present and strong? Is there good stregth and sensation?

--No, you should not attempt to reduce his should prior to radiographic evaluation. If a fracture or significant pathology is present in the joint, an attempt at reduction might make matters considerably worse. Wait for the X-rays. You can give him analgesics in the meantime.