Knee Flashcards
Q angle
ASIS to mid-patella to tibial tubercle
male: <15
Knee extension
0 - 5-15
Knee flexion
0 - 125-135
Tibial IR/ER
10-15
Patella Displacement
translate patella medially and laterally
Divide patella in 4 quadrants
patella should translate 2 quadrants in both directions
decreases mobility indicates tight retinaculum
Patella apprehension
flex 20, push patella laterally
pain/apprehension of subluxation: patellar instability or medial retinaculum/MPFL injury
Joint line tenderness
most sensitive exam for meniscal tear
patella compression/grind test
extend knee, fire quads, compress patella
pain: chondromalacia, OCD, PF arthritis/DJD of patella
J sign
actively extend knee from flexed position
lateral displacement of patella in full extension: maltracking
Mc Murray
Medial Meniscal Tear: Flex, varus, ER knee, then extend
Lateral Meniscal Tear: Flex, valgus, IR knee, then extend
Apley’s Compression
prone, knee 90, compress and rotate
pain or pop indicated meniscal tear
Lachman
flex knee 20-30, anterior force on tibia ACL injury (most sensitive) grade 1: 0-5mm grade 2: 6-10mm grade 3: >10mm A: good B: no endpoint
Anterior drawer
flex knee 90, anterior force on tibia
ACL injury
Pivot Shift
supine, extend knee, IR, valgus force on proximal tibia then flex knee
clunk with knee flexion indicates ACL injury
Posterior Drawer
flex knee 90, posterior force on tibia
PCL injury
Posterior Sag
supine, hip 45, knee 90, view laterally
PCL injury
Quadriceps Active
supine, knee 90, fire quadriceps
posteriorly subluxated tibia translates anteriorly if PCL is deficient
Reverse Pivot Shift
supine, flex knee 45, ER, valgus force on proximal tibia, then extend knee
PCL injury
Knee Valgus Stress
0 - MCL and cruciate ligament
30 - MCL
Knee Varus Stress
0 - LCL, cruciate
30 - LCL
Dial Test
Prone, ER at 90 then at 30 (+ 10 degree difference)
Increased ER at 30 - PLC
90 - PLC + PCL
(-) 30, (+) 90 - PCL
ER recurvatum
supine, legs straight, raise legs by toes
recurvatum, varus, IR of knee indicates PLC (+/- PCL) injury
Slocum
ACL + PCL : knee 90, IR tibia 30, anterior force
ACL, MCL, POL: knee 90, ER tibia 30, anterior force
Posterior Lateral Drawer
Knee 90, ER tibia 15, posterior force
laxity indicates PLC +/- PCL