AFO Flashcards
components of AFO
foundation
ankle control
foot control
superstructure
discuss foundations in AFO
metal or plastic
dsicuss insert or foot plate
adv:
- good control of foot
- shoe can be sep from brace
- permits changing shoes
- light weight
dis:
- reduces interior shoe volume
- more expensive
discuss stirrups
forms structure of AFO - U shaped and attached to shank
arms join brace uprights at ankle = congruency bet orthosis and joint
types of ankle control
posterior leaf spring
klenzak or DF spring assist
PF resistance
DF resistance
solid AFO
bichannel adjustable ankle locks
discuss posterior leaf spring
DF assist - holds foot to 90°
for pt c DF weakness or foot drop
no medial/lat stability
discuss klenzak joint
coil spring compresses in stance then rebound during swing
DF assist
discuss PF resistance
post stop
imposes flexion force at knee during early stance
prevent lax knee from hyper ex or buckling
only allows ~5° PF = knee extension = controls unstable knee
too much PF = recurvatum
discuss DF resistance
anterior stop
for pt c paralysis of triceps surae to achieve late stance
only allows ~5° DF = knee flexion = controls knee hyperextension
too much DF = buckling
discuss solid AFO
limits all foot and ankle motion - hemiplegia and spastic diplegia
trimline is ant to malleoli
discuss Bi CAAL
can either reduce or assist motion
discuss foot control
medial T strap: valgus correction
- on medial portion of shoe upper
- exerts laterally directed force to restrain pronation
lateral T strap: varus correction
- lat malleoli going medially
- corrects supination
discuss superstructure
proximal portion
weight relieving - consist of upright and shell, band or brim
discuss spiral AFO
winds around calf
controls but does not eliminate motion in all planes
discuss patellar tendon bearing brim
reduces amount of weight transmitted through foot
resembles transtibial prosthetic socket
