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Knee ligament injury during lateral impact.
Aviation, Space, and Environmental Medicine
|January 1, 1985
Summary
A woman sustained a torn anterior cruciate ligament and stretched medial collateral ligament during a lateral impact test. This knee injury, caused by tibial external rotation, highlights risks for subjects with joint laxity in impact studies.
Area of Science:
- Biomechanics
- Sports Medicine
- Injury Prevention
Background:
- Investigating injury mechanisms in lateral impact tests is crucial for understanding human responses to automotive crashes and experimental impacts.
- Previous literature lacks reports of anterior cruciate ligament (ACL) tears and medial collateral ligament (MCL) strains from similar human impact scenarios.
Observation:
- A volunteer female subject experienced a right knee injury, specifically an ACL tear and MCL strain, during a lateral (+Gy) impact test.
- The injury mechanism involved external tibial rotation on the femur with a flexed knee joint.
Findings:
- Contributing factors included forceful leg bracing, pre-existing knee joint laxity or hypermobility in the subject, and inadequate side supports to prevent lower extremity flailing.
- This specific combination of factors leading to ACL and MCL injury in a human lateral impact test is novel.
Implications:
- Future lateral impact research should exercise caution when involving female subjects.
- Exclusion of participants with abnormal joint mobility is recommended to mitigate injury risks in impact testing.
- Findings inform improved safety protocols for human subject testing in biomechanical and automotive safety research.