Knee Flashcards
Osteoarthritis generally occurs in what population?
Older; over 65, but can also occur in athletes who stress the knee’s articular cartilage under greater than normal forces
What test confirms osteoarthritis?
X-ray
Osgood-Schlatter disease generally occurs in what population?
Children between the ages of 9-14. It occurs in more boys than girls. Children who participate in sports are more highly at risk, and it generally happens after a growth spurt.
What is Osgood-Schlatter disease?
A bony outgrowth
Acute pain
3-4 weeks
Subacute
12 weeks
Chronic pain
anything longer than 3 months
Mechanism of Injury: medial collateral ligament with possible posterior medial capsule, medial meniscus and ACL.
Valgus force (from the outside in)
Terrible Triad is what?
MCL, ACL, Medial meniscus
Mechanism of injury: anterior cruciate often associate with meniscal tears
Hyperextension
M.O.I- PCL
Flexion and posterior translation
M.O.I- LCL with possible posterior lateral capsule and the posterior cruciate
Varus force ( Force from the inside-out)
M.O.I.- medical meniscal injuries. The medial meniscus bears most of the compressive forces, as compared to the lateral meniscus when weight bearing. Pivoting or twisting can tear the meniscus
Torsion injuries while weight bearing
Anterior knee pain may be due to:
Patella femoral problems, bursa (prepatella, infrapatella) pathology, tendinosis, Osgood-Schlatters
Osis implies
pathology
It is implies
inflammation
Pain during an activity is seen in…
structural abnormalities such as patella subluxation or patella tracking disorders
Pain after an activity indicates…
inflammatory disorders such as a synovial plica irritation or paratendonitis (inflammation of the sheath that surrounds the tendon), leading to jumpers knee (patella tendinosus)
Pain in the knee with ankle movement indicates
Superior tibiofibular joint problems
Aching pain may indicate
degenerative changes
Sharp “catching” pain usually indicates…
a mechanical problem such as patella femoral tracking
Stiffness/tightness indicates
swelling and/or arthritic changes or patella femoral dysfunction
Clicking in the knee could indicate
improper tracking of the patella in its groove or a loose body in the joint space
A pop at the time of injury could indicate
ligament tear of the ACL or fracture
If a patients knee “gives way” this indicates
instability of the knee d/t a meniscus pathology
Patella subluxation- if present with rotation or stopping
undisplaces osteochondritis dissecans- floating bone d/t poor blood supply
Knee locking at end range means
loose body or meniscal problem
localized swelling may be caused by…
an inflamed bursa
Patellofemoral dysfunction can cause recurrent swelling with..
ascending or descending stairs