Short answers, pulled from the story.
The most deceptive aspect of blunt trauma is that the most life-threatening injuries often leave no mark on the skin. A person can be struck with such force that their internal organs rupture while their body remains unbroken, creating a silent crisis that defies immediate visual detection.
The physics of blunt trauma relies on two distinct mechanisms: compression and deceleration. Compression occurs when a direct blow deforms a hollow organ and increases its internal pressure until it ruptures, while deceleration causes stretching and shearing at the points where mobile contents in the abdomen are anchored.
Traumatic brain injury is most commonly caused by falls, motor vehicle crashes, sports- and work-related injuries, and assaults. It is the most common cause of death in patients under the age of 25.
The most common causes of blunt pelvic trauma are motor vehicle crashes and multiple-story falls. These injuries are commonly associated with additional traumatic injuries in other locations and carry a risk of pelvic fracture, bleeding, and damage to the urethra and bladder.
The primary clinical concern with blunt trauma to the head is damage to the brain, although other structures including the skull, face, orbits, and neck are also at risk. Most patients with more severe traumatic brain injury have a combination of intracranial injuries such as diffuse axonal injury, cerebral contusions, and intracranial bleeding.
The initial evaluation and stabilization of traumatic injury follows the Advanced Trauma Life Support guidelines published by the American College of Surgeons. The assessment typically begins by ensuring that the subject's airway is open and competent, that breathing is unlabored, and that circulation is present.