Ortho Knee Flashcards
MCL: what kind of stress with rotation?
vaLgus
LCL: what kind of stress with rotation?
vaRus
Tx for grade I & II MCL & LCL collateral ligament injuries
sprains & incomplete tears:
conservative: NSAIDS, PT
Grade III MCL & LCL collateral ligament injuries
complete tear: surgical repair
MC knee ligament injury
ACL
MOI ACL
noncontact pivoting injury (deceleration, hyperextension, internal rotation)
Presentation for ACL
pop & swelling –> hemarthrosis
inability to bear wt
does not actively extend knee
What is the most specific and sensitive test for ACL?
lachman’s test: 30 degree flexion of affected knee, push thigh downa nd inferior knee up
Segond Fx
avulsion of lateral tibial condyle w/ vaRus stress to the knee seen in ACL injury
Tx ACL
therapy vs surgical
O’Donoghues triad
- ACL injury
- medial collateral ligament
- medial meniscus
MC associated with dashboard injuries
(ant. force to proximal tibia with knees flexed)
PCL injuries
presentation for PCL injury
anterior bruising
PE for PCL
pivot shift test, post drawer test
Cause of meniscal tears
degenerative: squatting, twisting, compression or trauma w/femur rotation on tibia
MC meniscal tear
Medial
Presentation for Meniscal tear
locking, popping, “giving way”, effusion after activities
Best test for meniscal tear
McMurray’s sign: pop or click when tibia is externally and internally rotated
Apley test
meniscal tear: joint line tenderness
Tx for meniscal tear
NSAIDS, partial wt bearing until ortho f/up
MOI patellar fx
direct blow
presentation for patellar fx
pain swelling deformity
dx for patellar fx
X ray: sunrise view
nondisplaced patellar fx tx
knee immobilizer, leg cast x 6 weeks
displaced patellar fx
surgery
MOI for patellar/quadriceps tendon ruptures
forceful quadriceps contraction –> fall on a flexed knee walking up/down stairs
patellar and quadriceps tendon rupture MC in what population
males w/ hx of systemic disease (DM, gout, obesity, renal dz)
Presentation for patellar/quadriceps tendon ruptures
sharp proximal knee pain w/ambulation, inability to extend knee/straight leg raise
patella baja
quadriceps: defect above knee
patella alta
patellar: defect below knee
Tx for patellar/quadriceps tendon
knee immobilizer, non or partial wt bearing, RICE
surgery within 7-10 days
patellar D/L MOI
valgus stress after twisting injury (ballet dancer)
PE patellar D/L
+ apprehension sign
patellar D/L tx
closed reduction
Knee D/L complication
severe limb threatening emergency!!!
what artery should you be concerned about in a knee D/L?
popliteal artery rupture
perform arteriography
knee D/L Tx
immediate ortho consult
MOI femoral condyle Fx
axial loading: fall from height
presentation for femoral condyle Fx
peroneal nerve injury (check 1st webspace) foot drop
popliteal artery injury
Femoral condyle Fx Tx
immediate ortho consult
Tibial plateau Fx
axial loading/rotation/direct trauma
MC in children in MVA
tibial plateau Fx complication
post degenerative arthritis
If tibial plateu Fx is displaced, what should you check for?
peroneal nerve injury (foot drop)
osteochondritis of the patellar tendon @ tibial tuberosity from overuse
osgood schlatter disease
MCC of chronic knee pain in young, active individuals
osgood schlatter disease
MC in 10-15 y/o athletes w/ “growth spurts”
osgood schlatter disease
Typical presentation for osgood schlatter disease
activity related knee pain/swelling
painful lump below knee, tenderness to anterior tibial tubercle
Dx test of choice for osgood schlatter disease
X ray: prominence or heterotrophic ossification @ tibial tuberosity
Tx for osgood schlatter disease
RICE, NSAIDS, quadriceps stretching, resolves w/time
Typical presentation for Bakers cyst
popliteal mass, knee effusion
ruptured popliteal cyst mimcs what
DVT
Dx for popliteal cyst
US
Bakers cyst Tx
ice, assisted wt bearing, NSAIDS, CS injection
idiopathic softening/fissuring of patellar articular cartilage
MC in runners
patellofemoral syndrome (chondromalacia)
PE for patellofemoral syndrome (chondromalacia)
+ apprehension sign
Tx for patellofemoral syndrome (chondromalacia)
NSAIDS, rest, rehab
inflammation of IT band bursa
IT band syndrome
MCC of knee pain in runners
IT band syndrome
Presentation of IT band syndrome
lateral knee pain during onset of running, then resolves
worse with climbing stairs or running downhill
Ober test
pain/resistance to adduction
IT band syndrome
+ lateral condyle tenderness
IT band syndrome
anterior knee D/L is caused by..
hyoerextension
Knee instability in multiple directions
tibiofemoral dislocation (anterior knee dislocation)
dimple sign with posterolateral dislocation
anterior knee D/L
posterior knee D/L is caused by….
direct blow to anterior tibia with knee flexed
heel pain worse after period of rest that gets better with movement throughout the day
plantar fasciitis
pain that increases with dorsiflexion of the foot and usually worse after period of rest
plantar fasciitis
Dx for plantar fasciitis
X rays may show flat foot deformity or heel spur
Tx plantar fasciitis
stretching exercises for plantar fascia and calf muscles
avoid flat shoes and barefoot walking
NSAIDS
absence of plantar flexion w/ squeezing of calf
achilles tendon rupture
Tx for achilles tendon
Splint in plantar flexion, keep nonweight bearing, ortho follow up q
Galeazzi Test
identifies developmental hip dysplasia due to femoral shortening
Knees NOT level = positive test