Knee Collateral Ligament Injury

Last updated 20.05.13

 

Index

 

Definition

-  Injury to the medial &/or collateral ligaments of the knee joint

 

Features

-  Lateral collateral ligament injuries rare

-  Often associated with ACL &/or PCL injury

 

Cause

-  Medial collateral ligament: valgus strain in flexed knee

-  Lateral collateral ligament: varus strain in flexed knee

 

Associated S/S

-  Pain

-  Antalgic gait, limp

-  Worse on movements changing direction

-  +/- Instability on changing directions

-  Knee examination

-  Swelling, erythema, warmth

-  Bruising

-  Assess integrity of collaterals

-  Flexion of knee at 30o

-  Apply varus & valgus strain

-  Full extension then repeat varus & vulgas strains

 

DDx

-   

 

Grades

-  Predicts speed of recovery

-  I: pain without laxity, <3mm gapping

-  II: more painful, 5-10mm laxity

-  III: less painful, >10mm laxity

 

Ix

-   

 

Mx

-  Analgesia

-  RICE

-  Conservative Mx

-  Splinting

-  High hinged knee brace preventing varus & vulgus strains

-  Physiotherapy

-  6-12weeks rehabilitation

-  Referral for lateral collateral ligament injuries

-  Often associated with ACL &/or PCL injury

 

 

 

References