General Knee Facts
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each of the black spaces below before clicking
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| Three Functions of Meniscus | 1. Increase stability and congruence
2. Load distribution and transmission
3. Shock absorption
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| Name the attachments for the medial meniscus | Semimembranosus and MCL
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| Which region of the meniscus is vascular? avascular? | Outer 1/3 is the RED ZONE (vascular)
Inner 2/3 is the WHITE ZONE (avascular)
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| Movement of the meniscus in flex/ext is determined by the __________ Movement of the meniscus in rotation is determined by the _________. | Flex/Ext: movement in direction of tibial plateau Rotation: movement in direction of femoral condyles
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| Describe the shearing action caused on the meniscus when a football player plants and changes direction? (CKC) | Flexion: causes meniscus to move posterior (tibial plateau attachment)
External Rotation: causes posterior to move anterior (determined by femoral condyles).
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| Surgical indications for Vascular vs. Avascular portions of mensicus | Blood Supply: meniscal repair Avascular:menisectomy to recreate normal anatomy
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| Age for "normal tears"? How is the meniscus usually injured before this age? | 40 years old.
Before 40, meniscus usually requires trauma since it is softer and not as brittle.
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| Signs and symptoms of Meniscal Injury | 1. Posterior joint line pain
2. Effusion
3. Locking and Catching
4. Some would say Mcmurray's sign however it is not as reliable
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| What factors determine treatment progression for pts. with a menisectomy? | Inflammation and pain. Could return to activity in as little as one week, usually 4-6.
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| Which type of tear will often times cause locking in the joint? | Bucket Handle Tear. The other tear we are responsible for is the Longitudinal tear, which if located in the avascular portion would need to be cut out
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| Limitations for Meniscal Repairs post-surgical | 1. Zero or Weight bearing in full extension for 4-6 weeks
2. Avoid HS contractions or adductor exercise for medial mensicus repairs.
3. Limit to 90 degrees of flexion for 4 weeks.
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| 3 Weeks post-op: SLR's | Med.: Not in extension or adduction
Lat: Yes in all 4 directions
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| 3 Weeks post-op: OKC: Knee Extension | Yes from 90º-0º
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| 3 Weeks post-op: CKC Partial squats | No. Cannot weight bear into flexion
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| 3 Weeks post-op: Standing Hamstring Curls | Medial: NO
Lateral: YES
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