KNEE Flashcards
PP: Supine; femoral epicondyles // to IR; leg 5o inward (places interepicondylar line // to IR)
RP: 0.5 in. inferior to patellar apex
CR: depending on the measurement b/n ASIS & table top
3-5ocaudad (<19 cm; thin pelvis)
┴ (19-24 cm)
3-5ocephalad ( >24 cm; large pelvis)
SS: Knee joint space
AP PROJECTION
PP: Prone; femoral epicondyles // to IR; leg 5o inward (places interepicondylar line // to IR)
RP: 0.5 in. inferior to patellar apex
CR: 5-7ocaudad
SS: Knee joint space
PA PROJECTION
PP: Lateral recumbent; knee flexed 20-30o (relax muscle & shows maximum volume of joint cavity) or flexed <10o (for new or unhealed patellar fx); femoral epicondyles ┴ to IR
RP: 1 in. distal to medial epicondyle
CR: 5-7o cephalad
SS: Knee joint space
LATERAL PROJECTION
Mediolateral
PP: Supine; leg rotated 45o medially; hip of affected side elevated
RP: 0.5 in. inferior to patellar apex
CR: depending on the measurement b/n ASIS & table top
3-5ocaudad (<19 cm)
Perpendicular (19-24 cm)
3-5ocephalad (>24 cm)
SS: Proximal tibiofibular joint; fibular head
AP OBLIQUE PROJECTION
Medial Rotation
PP: Supine; leg rotated 45o medially; hip of unaffected side elevated
RP: 0.5 in inferior to patellar apex
CR: 5o cephalad
SS: Tibial plateaus; medial femoral & tibial condyles
Lateral Rotation
PP: Upright; knee fully extended; weight equally distributed on both feet; IR vertical
RP: 0.5 in. inferior to patellar apex
CR: Horizontal
SS: Knee joint spaces
ER:
To reveal narrowing of knee joint space
To evaluate varus & valgus deformities & degenerative joint disease
WEIGHT-BEARING METHOD
AP BILATERAL PROJECTION
LEACH-GREGG-SIBER
PP: Upright; facing vertical IR; anterior surface of flexed knee against IR; femur 45o to IR
RP: 0.5 in. inferior to patellar apex
CR: Horizontal or 10o caudad
ER: Useful for evaluating joint space narrowing & demonstrating articular cartilage disease
ROSENBERG METHOD
PA WEIGHT-BEARING
STANDING FLEXION
