Waddell's triad

Waddell's triad is recognized in clinical practice as associated with high-velocity accidents such as motor vehicle, auto-pedestrian, or bicycle crashes

Waddell's triad consists of

1. Femur fracture
2. Intra-abdominal or intrathoracic injury
3. Head injury,

Waddell's triad

Waddell's is only for pediatric pedestrian vs. auto. While logical, it is actually very rare to see all three injuries. See Pediatric pedestrian versus motor vehicle patterns of injury: debunking the myth.
Orsborn R, Haley K, Hammond S, Falcone RE.