Flashcards in Knee Deck (18)
Most frequently occurs as the result of a sudden directional change while running, but may also be due to trauma.
Increased “Q-Angle” for any reason is a predisposing factor
Due to the more anterior projection and deeper slope of the lateral femoral condyle the patella almost always dislocates _____
Lateral dislocation is counterbalanced by the ______. Therefore, if this muscle is weak the patella may shift laterally and dislocate.
vastus medialis muscle
Patella may relocate upon
full knee extension
A positive ______ test and a positive _______ sign are indicative of dislocations.
A positive patellar ______ test and a positive ______ sign also indicate dislocation.
______ need to be taken to rule out an osteochondral fracture which occur approximately 50% of the time in a patellar dislocation
x-ray: Best seen on a _____ view
MRI: Used to view ______
tx: Allow ____ weeks of immobilization with the knee in extension along with lateral compression
tx by surgery: ______ surgery may be done to release excess pressure from the lateral ligaments and may allow the patella to resume its normal position
Painful, abnormal tracking of patella with patellar surface of femur
Weak quads, tight ITB and hamstrings
This condition often occurs in patients who lack a supportive medial arch
Foot pronation causes a compensatory internal rotation of the tibia or femur (femoral anteversion) that upsets the patellofemoral mechanism
Pes Planus (Pronation)
Condition w/ a high-arched foot provides less cushioning for the leg when it strikes the ground.
This places more stress on the patellofemoral mechanism, particularly when a person is running.
Pes Cavus (High-Arched, Supination)
Tight ______ place more posterior force on the knee, causing pressure between the patella and femur to increase
Tight ____ muscles can lead to compensatory foot pronation and, like tight hamstrings, can increase the posterior force on the knee.