Transverse disruption of the abdominal wall--a tell-tale sign of seat belt related hollow viscus injury.

A pattern of injuries has been observed in five (5) female front seat passengers wearing seat belts. All were involved in high speed frontal impact motor vehicle accidents on country roads. Varying degrees of abdominal wall disruption involving fat, fascia or muscle, were universally associated with hollow viscus injury and right-sided rib fractures. Most patients had mesenteric or omental tears, flail chests and left clavicular injuries. Intimal tears of the distal aorta, right breast injuries and spinal injuries were also observed. The hollow viscus and mesenteric injuries may result from direct crushing, sudden rises of intraluminal pressure, or shearing forces acting at points of mesenteric attachments. At laparotomy it is recommended that necrotic or contused fascia and muscle be excised with primary abdominal closure and contused fat be excised or curetted and suction drainage applied to the subcutaneous tract. Abdominal wall disruption from seat belt trauma reflects the forces involved on impact and should alert the surgeon to the observed pattern of internal injuries.