Knee Flashcards
What are the risk factors for PFPS?
- Increased medial patellar mobility
- Decreased quadriceps flexibility
- Decreased lower extremity explosive strength (vertical jump)
Describe plica syndrome
Symptoms?
- thickened and inflamed synovial folds
- usually only the medial plica
Symptoms:
- snapping sensation
- buckling
- knee pain with sitting
Describe Osteochondritis Dissecans
- Most common area affected?
- Symptoms?
- XRays: what view?
- lesion affecting articular cartilage & subchondral bone
Most common: posteriolateral aspect of the medial femoral condyle
Symptoms:
Pain: vague, poorly localized
Recurrent effusions
XRays: - Tunnel (notch) view
What are the 5 structures of the posteriorlateral Corner
2 muscles: - lateral head of gastroc -popliteus 3 ligaments: - popliteofibular ligament - LCL - Arcuate ligament
What does the PLC serve as the primary restraint to?
Varus stress (LCL most important) ER forces
What does the PCL resist?
Resists posterior displacement of the tibia in relation to the femur
MOI of a PCL injury?
Direct blow to the anterior aspect of the proximal tibia when knee is flexed:
- Football
- Soccer
- Skiing
What test is most SN for a PCL injury?
Most SP?
SN: Posterior Drawer test
SP: Quadriceps Active Test
What % of ACL injuries are:
Direct contact:
Non-contact:
Direct contact: 30%
Non-contact: 70%
ODonohue’s Triad:
Shelbourne & Nitz Triad:
ODonohue’s Triad:
- ACL, MCL, and Medial meniscal tear
Shelbourne & Nitz Triad:
- ACL, MCL + meniscus
Who is at risk for an ACL tear?
- Increased genu valgum
- Decreased knee flexion with landing
What does OATS stand for?
Osteochondral Allograft or Autograft Transplantation
MCL rehab; in early rehab what position should the knee be kept in to minimize loading to the MCL?
knee flexed
Portion of the ACL most often injured when the knee is in extension?
Posterior bundle
Special test most likely to detect an injury to the anterior bundle of the ACL?
Anterior drawer test
