I was wondering what are some possible car accident injuries that require immediate surgery?

Injuries to the Head: Chest, heart, abdomen, pelvis, spine, which are life threatening injuries, require immediate surgery, mainly to control bleeding, repair of heart/major vessels, lung/windpipe or liver/spleen/kidney lacerations, pelvic or long bones complicated fractures, including open ones. Removing blood from within the skull, chest, abdomen/pelvic cavities.