A driver wearing seat belt, suddenly applies brakes to avoid a collison. Which of the following body parts is most likely to be injured?

     A. Spleen                                    B. Mesentry

     C. Liver                                       D. Abdominal aorta.

Answer: B.

Explanation: 

• Sudden break will cause acute flexion of body over the lap strap of seat belt.
• This kind of injury can give rise to 'seat belt syndrome' which includes small intestine avulsions, intestinal, omental and mesenteric lacerations and intestinal contusions and perforations.
• Rupture of spleen, liver, pancreas, caecum and bladder occur due to compression between belt and vertebrae.
• Abdominal aorta can be crushed. Acute hyper flexion can cause fracture of lumbar vertebrae usually at the second or third segment of interspace.
• Seat belts reduce the risk of death by about 40%. It restrains the body against deceleration, keeping it away from windscreen, steering wheel and other obstructions. It prevents ejection from the vehicle onto the road.

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