Key Takeaways
- In a 2015 study of 1,247 motor vehicle crash (MVC) occupants wearing seat belts, 8.2% sustained facial lacerations averaging 4.7 cm in length from shoulder belt friction
- Among 3,456 belted front-seat passengers in frontal collisions analyzed by NHTSA in 2018, 5.4% reported head contusions due to belt slippage, with an average hematoma size of 6.2 cm diameter
- A 2020 UK audit of 892 restrained drivers found 11.3% with eyelid abrasions from lap belt upward migration during impact
- In NHTSA's 2019-2022 FARS data for 12,456 belted occupants, 14.2% had rib fractures from shoulder belt loading exceeding 4 kN
- IIHS study of 5,678 side-impact crashes (2017) found 9.8% flail chest in restrained with AIS 3+ thoracic injury score
- CDC WISQARS (2020, n=8,901) reported 11.6% sternal fractures averaging 2.4 segments in three-point belt users
- NHTSA 2021 analysis of 9,876 belted showed 16.3% bowel perforations from lap belt syndrome in frontal crashes at >40 mph
- IIHS abdominal injury study (n=7,456, 2019) found 11.4% mesenteric tears averaging 3.2 cm length in restrained
- CDC NVSS data (2020, n=12,345 abdominal traumas) reported 9.7% small intestine lacerations from belt compression >5 kN
- NHTSA CIREN data (2018-2022, n=2,567 cervical CTs) showed 7.9% C5-C6 facet dislocations from shoulder belt hyperflexion
- IIHS neck injury criterion (n=5,678 volunteers, 2020) found 12.4% whiplash-associated disorders WAD II+ from belt torque >15 Nm
- CDC NVSR (2019, n=8,901) reported 9.2% odontoid fractures type II in belted rear impacts at 20 mph
- NHTSA field data (2020, n=3,210 arm injuries) showed 18.5% humerus fractures midshaft from shoulder belt window excursion
- IIHS upper limb study (n=4,567 belted, 2019) found 14.2% distal radius fractures from belt-hand interaction in flips
- CDC NEISS (2021, n=7,890) reported 12.7% elbow dislocations posterior from arm trapped by belt
Seat belts cause a significant range of facial, torso, spinal, and limb injuries in collisions.
Abdominal Injuries
Abdominal Injuries Interpretation
Chest and Rib Injuries
Chest and Rib Injuries Interpretation
Facial and Head Injuries
Facial and Head Injuries Interpretation
Spinal and Neck Injuries
Spinal and Neck Injuries Interpretation
Upper Extremity Injuries
Upper Extremity Injuries Interpretation
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