Final answer:
The nurse should take immediate action due to symptoms and diagnostic results suggesting pneumothorax in the adolescent.
Step-by-step explanation:
Based on the information in the adolescent's medical record, the nurse should plan to take immediate action due to the presence of symptoms and diagnostic results that suggest the adolescent may have a pneumothorax. The adolescent arrived in the emergency department following a motor-vehicle crash and reported sharp pain in the chest. The physical examination revealed diminished breath sounds in the left lung, and the chest x-ray indicated air in the left pleural space. A CT scan is recommended for definitive diagnosis.