Y5 - Knee: Other ligament injuries (MCL, LCL, PCL) Flashcards
what is the mcl
a supporting structure in the medial part of the knee
what is the function of the mcl
to resist valgus
what is the mechanism of mcl injury
a large valgus and or external rotation force suddenly placed on the knee
signs and symptoms
medial sided knee pain
joint effusion
audible pop at time of injury
instability
RFs
bimodal ages (young adults and eldelrly)
first line investigation
plain xray of knee
stress xray of knee
epi
very common knee injury
however many minor mcl injuries never reach a physician
adults>children
aetiology
valgus (twisting outwards away from the midline) and or external rotation
commonly by a blow to the lateral knee
what are the mechanisms of mcl injury
contact
non-contact (skiing)
over-use (breast stroke mechanisms)
where is the most common site of mcl injury
femoral insertion site
what classification is used for mcl injuries
o’donoghue
what test is used for the mcl
abduction stress test
positive result is pain and laxity
