I'm writing a book, in which the character is involved in a major car accident. what are procedures in the ambulance, and possible fatal injuries?

Liver laceration: Emergency medical personnel usually arrive at the scene, they may have to extricate the patient from the vehicle using power instruments to break through doors or cut out glass, apply a cervical collar and place the patient on a spinal board, perform CPR if necessary, apply a tourniquet around bleeding limbs, or start ivs and fluids. Fatal injuries include liver laceration or splenic rupture.