B3 MSK Flashcards
Coxa Vara
Decreased angle of inclination, les than 120
Short leg, limp, waddle
Increase stress femoral neck
Coxa Valga
Angle inclination increased, above 135
Intwbility, abnormal gait, predispose dislocate
Reduce adductor muscle effective
Strongest ligament body
iliofemoral (y shape)
Resist hyper extension
Upper lateral restrict excess external rotation and adduction
Frontal medial restriction extension and internal rotation
From AIIS
Weakest hip ligament
Ischiofemoral ligament
Posterior reinforce
Attach acetabular rim to femoral neck and greater trochanter
Hip dislocation
90% posterior
Acetabulum deeper anterior
Ischiofemoral (posterior) weakest ligament
Limp shorter, flexed, adducted, medial rotate
Posterior hip dislocation X-ray
Head superolateral to scetabulum
May seem smaller
Anterior hip dislocation zray
Inferior head
Seem larger
Limb flex, abduct. Lateral rotation
Blood supply head/neck femur
Medial circumflex artery
Often torn or lead to necrosis
Head femur get acetabular branch
Blood supply head/neck femur children
Obturator artery posterior branch give acetabular branch
Femoral neck fracture
Mostly from osteoporosis
10% die in month, 33% die in year
Typically cause upward displacement due to glute muscles
Femoral a vascular necrosis
Bone tissue dies
Retinacular arteries upply femoral head easy damage
Especially if surgery delayed or displaced
Extracapsular fracture
Easy unite
Rare cause a vascular necrosis
Tibias fracture
Most common middle & inferior shaft
Poor blood supply
Compound fracture common with high energy trauma
Stress fracture tibia
Very common long hikes without conditioning
Diagonal tibial fracture
Severe torsion in skiing most common
Limb shortening
High speed forward fall over boot
Call boot top fracture