Knee ligament injuries in U.S. pedestrian crashes
Traffic Injury Prevention
|July 6, 2022
Summary
Cruciate ligament injuries can occur in pedestrian crashes independently of collateral ligament damage. This finding supports including cruciate injury risk in pedestrian safety testing protocols.
Area of Science:
- Biomechanics
- Traumatology
- Road Safety
Background:
- Projectile legform tests assess pedestrian lower extremity injury risk.
- Current protocols may not fully account for isolated cruciate ligament injuries.
Purpose of the Study:
- To investigate the occurrence of isolated cruciate ligament injuries in U.S. pedestrians.
- To determine if cruciate ligament injuries happen without collateral ligament damage.
Main Methods:
- Analysis of pedestrian injury data from the National Trauma Data Bank (NTDB) and Trauma Quality Program (TQP) from 2007-2017.
- Inclusion of crash and demographic details from the Pedestrian Crash Data Study (PCDS).
Main Results:
- Among pedestrians aged 16+, 31% sustained isolated cruciate ligament injuries.
- In younger pedestrians (0-15 years), 36% had isolated cruciate injuries.
- These figures are conservative estimates, with actual rates potentially higher.
Conclusions:
- Cruciate ligament injuries occur in pedestrian crashes, sometimes without collateral ligament damage.
- Isolated cruciate injuries support the need for their inclusion in pedestrian legform test procedures.
- Testing should incorporate measures for cruciate injury risk, especially for impacts above/below the knee.
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