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Illustrations of common knee injury patterns including:
- valgus force
- varus force
- pivot-shift
- dashboard injury
- hyperextension
From the case:
Patterns of knee injury
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Illustrations of common knee injury patterns including:
- valgus force
- varus force
- pivot-shift
- dashboard injury
- hyperextension
Case Discussion
Common mechanisms of injury one can expect to encounter:
-
valgus force
- force is placed on the lateral side of the knee resulting in stress to the medial side, such as:
- catching the back, inner portion of your skis as one tries to 'pizza' and in turn, placing significant stress to the medial side of the knee (my worst fear skiing)
- force is placed on the lateral side of the knee resulting in stress to the medial side, such as:
- varus force
- force is placed on the medial side of the knee thus placing stress on the lateral side
- catching the front, outer portion of your skis as one tries to 'pizza' and in turn, placing significant stress to the medial side of the knee as it bends toward the lateral (also my worst fear skiing)
- force is placed on the medial side of the knee thus placing stress on the lateral side
-
pivot shift
- valgus load combined with external rotation of the tibia and/or internal rotation of the femur, such as:
- rapid deceleration and direction change whilst running
- valgus load combined with external rotation of the tibia and/or internal rotation of the femur, such as:
-
dashboard injury
- the force applied to the anterior proximal tibia whilst the knee is flexed, such as:
- passenger striking a dashboard in an MVA
- the force applied to the anterior proximal tibia whilst the knee is flexed, such as:
-
hyperextension
- the direct force applied to the anterior aspect of the knee
- car vs knee
- the direct force applied to the anterior aspect of the knee
-
clip injury
- valgus impact on a flexed knee, such as:
- being tackled from the side in football
- valgus impact on a flexed knee, such as:
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