[Expert Solution]: It is 0300 and you are called to the scene…

It is 0300 and you are called to the scene of a 25-year-old male driver involved in a motor vehicle crash (MVC). You arrive on scene to find a compact sedan impacted into a telephone pole with significant front-end damage, a shattered windshield, and front airbags deployed. Bystanders moved the driver out of the vehicle thinking they were helping the patient. You find the driver on the pavement with rapid shallow respirations, facial cyanosis, accessory muscle use, absent radial pulses, rapid and weak carotid pulse, and pale skin. Although the patient can only speak in 2- to 3-word sentences, he states that his left chest hurts, and says, “I can’t breathe!” Bystanders state he was not wearing his seat belt. Your crew initiates spinal protection and places the patient on 15 L/min of oxygen via nonrebreathing mask. You assess his airway to be clear and note his increased work of breathing and absent radial pulses. What body structures are in the thoracic cavity and what is your current differential diagnosis related to the chest findings?