Knee conditions Flashcards
Ligament sprains - four major ligaments may be involved
ACL PCL MCL LCL
ACL laxity may result in _____ instability
single plane anterior instability
PCL laxity may result in ____ instability
single place posterior instability
ACL and MCL laxity may result in ___ instability
anteromedial rotary instability
ACL and LCL laxity may result in ___ instability
anterolateral rotary instability
PCL and MCL laxity may result in ___ isntability
posteromedial rotary instability
PCL and LCL laxity may result in ___ instability
posterolateral rotary instability
Classification of injury with ligament sprain -
first degree - little or no instability
second - minimal to moderate instability
third - extreme instability
ligament sprain - unhappy triad
injury to MCL, ACL, medial meniscus from combination of valgum, flexion, and ER forces applied to knee when foot is planted
Meniscal injuries - result from
combination of forces to include tibiofemoral joint flexion, compression, and rotation which places abnormal shear stress on meniscus
Meniscal injuries - special tests
Mcmurry
Apley
Patellofemoral conditions - abnormal patella positions - patella alta
Malalignment where patella tracks superiorly in femoral intercondylar notch
Patellofemoral conditions - abnormal patella positions - patella alta - what sign will be seen
positive camel back sign (two bumps over anterior knee region instead of typical one)
Patellofemoral conditions - abnormal patella positions - patella baja
Malaligment where patella tracks inferiorly in femoral intercondylar notch
Patellofemoral conditions - abnormal patella positions - patella baja results in
restricted knee extension with abnormal cartilaginous wearing, resulting in DJD