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Knee Special Tests

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Special Test
Tests for...
Positive (+) Test
Varus Stress   LCL laxity   increased opening of joint space (at 0 degrees - damage to capsule and ligament, at 30 degrees - damage to ligament only)  
Valgus Stress   MCL laxity   increased opening of joint space (at 0 degrees - damage to capsule and ligament, at 30 degrees - damage to ligament only)  
Lachman's   ACL laxity   increased anterior translation of the tibia; increased laxity of the ACL  
Anterior Drawer   ACL laxity   increased anterior translation of the tibia; increased laxity of the ACL  
Slocum's   anterolateral and posteromedial instability   increased anterolateral (IR) and posteromedial (ER) translation  
Hughston's/Jerk   anterolateral instability; ACL laxity   tibia subluxes anteriorly with knee at 20-30 degrees FLEX  
Pivot Shift (McIntosh)   anterolateral instability; ACL laxity   posterior shift of the tibia going into 30-40 degrees knee FLEX; anterior shift of the tibia into knee EXT  
Posterior Sag (Godfrey's )   PCL laxity, posterior joint capsule integrity, arcuate complex instability   tibia sags posteriorly  
McMurray's   medial and lateral meniscal damage   pain, clicking at the joint line  
Apley's Compression   meniscal damage   pain with compression  
Apley's Distraction   ligamentous damage   pain with distraction  
Medial Synovial Plica   symptomatic plica dysfunction   reproduction of symptoms  
Stutter   medial synovial plica dysfunction   irregular motion (stuttering) between 40-60 degrees into knee EXT  
Wilson's   osteochondral defects or osteochondritis dissicans   pain with EXT and tibial IR that is relieved with tibial ER  
Grind (Clark's Sign)   deterioration of patellar articular cartilage   pain under patella; grinding  
Apprehension   patellar subluxation/dislocaiton   apprehension, pain during lateral translation of the patella  
Sweep   joint effusion   small area of fluid accumulates on the medial aspect of the knee  
Ballotable Patella   joint effusion   patella rebounds, "floats up" after depression  


   


 

 

 
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