Lecture week 1 and 2 Flashcards
(17 cards)
What is the presentation of PCL?
young athlete, knee pain below tibia w/knee flexed
minimal swelling
discoloration/bruising post. lower leg day or two (d/t rupture of capsule w/drainage in fascial plan)
MC mechanism of PCL
hyper flexion or Dashboard injury
A posterior translations of what can create the Sag sign?
tibia on femur
What ortho exam test the PCL?
posterior drawer test
Depression of tibial tubercle occurs d/t what structure moved posteriorly?
tibial tuberosity
Is the PCL shorter or longer than the ACL and by how much?
Longer by 30 percent
What are the 2 bundles of the PCL?
anterolateral = tight in Flexion posteromedical = tight in Extension
Where is PCL located?
b/t meniscofemoral ligaments
What is the biomechanics strength of PCL?
2500-3000 N posterior
minimizes posterior tibial displacement 95 percent
Meniscus tears occur following what actions?
flexion or rotation
What is the hallmark of meniscus injury?
clicking, popping or locking
knee locking in flexion
Meniscus are made of what type of fibers?
fibroelastic cartilage
What are the function of the meniscus?
increasing congruency
shock absorption
transmitting 50 percent weight bearing load in extol 85 in /flexion and secondary stabilizer
Causes of menisci tears
compression and rotation
slow healing
outer 25 percent vascularization via fibrocartilage scar formation
What is pt symptoms be with menisci tear?
pain located to R/L
mechanical locking/clicking especially w/squat
delayed/intermittent swelling
What are good oaths for meniscus tear is suspected?
mcmurray apply compression thessalys bounce home MRI if severe to fully view extent of dame
What is required for meniscus tear physical exam?
joint line tenderness (most sensitive)
effusion
provocative test
MRI, High false positive, sensitive dx test
