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Losdigity72
on FreezingBlue Flashcards.
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What is the screw home mechanism
the rotation that occurs between the femoral condyles and the tibia during the final degrees of extension. With the tibia fixed the femur rotates medially and the tibia rotates laterally
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How is the ACL oriented between the femur and tibia
Lateral femoral condyle to medial tibia
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How is the PCL oriented between the femur and tibia
Medial femoral condyle to lateral tibia
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The lateral collateral ligament resists what kind of stress
Varus Stress
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The medial collateral ligament resists what kind of stress
Valgus stress
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What connects to the Gerdys tubercle
The IT band
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What muscles connect to pes anserine
sartorius, gracilis, semitendinosus
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What degree ROM is needed to rise from a chair and climb stairs
90 and 100
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Describe the grades and differences between ligament sprains
- Grade 1 mild pain, local tenderness, no laxity
- Grade 2 mod pain, point tenderness, edema, some fibers torn/stretched, mild to moderate laxity
- Grade 3 severe pain at time of injury, edema, complete tear
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Deformity at the knee joint associated with OA is classified as
genu varum
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What are some affects of OA on the knee joint
- deformity-genu varum
- instability-capsular laxity, decreased stability of meniscus, inhibited quads
- functional limitations- decreased ROM in flexion more than extension, impaired balance
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What are some procedures to repair articular cartilage defects
- autograft transplant-from non-WB surface
- chondrocyte implantation-harvested/cultured
- allograft-cadaver tissue harvested/cultured
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After articular cartilage repair what is critical during therapy to
- adherence to weight bearing restrictions especially if large area.
- protective bracing in extension, remove for exercise only
- low impact allowed 6 months post
- high impact allowed 12 months (depending size of lesion)
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Fully constrained TKA are used in what circumstances
- low demand patients with knee joint instability
- collateral ligaments are not intact
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This type of TKA implant offers some stability and is more mobile
semi-constrained (most common)
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Weakness in what muscle will allow excessive lateral patellar glide
Vastus medialis oblique (VMO)
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Pronation of the foot has what effect on the Q-angle
increases Q-angle
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It band tightness will prevent what type of glide of the patella
medial
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How is Q-angle measured
ASIS through center of patella and tibial tubercle through center of patella
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Q-angle is influenced dynamically and passively by what
Dynamically by the quadriceps line of pull and passively by ligamentous, capsular and retinaculum
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Plica is also known as what
movie theater knee
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Tight hamstrings can cause what in the knee
compression
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What are some conservative treatments for patellofemoral dysfunction
- Pateint Ed-posture/positioning/avoid exacerbating activities
- Patellar mobilizations-not laterally
- McConnell Taping-stretches lateral retinaculum
- VMO strengthening-no open chain extension
- Hamstring & It Band stretching
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