click below
click below
Normal Size Small Size show me how
Knee Special Tests
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 |