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Pediatric abdominal injury patterns generated by lap belt loading.

Stephen Stacey¹, Jason Forman, William Woods

¹Center for Applied Biomechanics, University of Virginia, Charlottesville, Virginia 22902, USA.

The Journal of Trauma

|December 17, 2009

Summary

This summary is machine-generated.

Seat belt position in car crashes significantly impacts pediatric abdominal injuries. Upper belt placement causes spleen and rib injuries, while lower placement affects intestines. The "seat belt sign" helps identify internal trauma.

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Area of Science:

Pediatric trauma research
Biomechanics of injury
Automotive safety engineering

Background:

Child occupants are at risk of abdominal injuries from adult seat belts in motor vehicle crashes.
The relationship between seat belt position and specific injuries in children is not well-understood.

Purpose of the Study:

To quantify the relationship between lap belt position and abdominal injuries in a pediatric model.
To evaluate the predictive value of the

Main Methods:

Conducted 34 dynamic crash tests using a validated porcine model simulating a 6-year-old's abdomen.
Varied lap belt position to either the upper or lower abdomen.
Performed necropsies to identify and correlate injuries with belt position; assessed the utility of abdominal abrasions as injury predictors.

Main Results:

Significant differences in injury patterns were observed between upper and lower abdominal belt loading (p < 0.01).
Upper abdominal loading resulted in splenic lacerations and rib fractures; lower loading caused intestinal injuries.
Abdominal abrasions were specific (0.86) but not sensitive (0.33) for moderate internal injuries.

Conclusions:

Injury patterns differ based on lap belt placement in pediatric vehicle occupants.
The "seat belt sign" is more useful for ruling in than ruling out occult abdominal trauma in children.
Clinicians can use injury patterns and the "seat belt sign" to evaluate children with potential abdominal trauma after crashes.