Amputation/prostheses/orthotics Flashcards
(22 cards)
above knee prosthesis: low walls vs high walls
low walls similar to weak mm
high walls similar to tight mm
stance phase AKA cause of deviations:
1lateral bend
2abduction
3lordosis
4forward flexion
- short prosthesis, inadequate lateral wall
- long prosthesis, abducted hip joint
- uncomfortable anterior socket wall
- unstable knee joint
early swing phase AKA high heel rise cause
inadequate friction, slack extension aid
late swing phase AKA terminal impact
terminal impact- when it snaps into extension too fast
extension aide too taut
stance heel off AKA heel whip
knee bolt rotated; prosthesis donned in malrotation
LIME WHIP
laterap whip - IR
medial whip - ER
heel contact AKA foot rotation
stiff heel cushion, malrotated foot
what does too stiff heel cushion/hard PF bumper lead to
decreased PF > stuck in increased DF and knee flexion
what does too soft PF bumper/soft heel cushion lead to
increased PF and knee hyperextension
what is impetigo
bacterial infection that mostly infects children
what type of AKA contracture is common
flexion and abdudtion
transtibial pressure sensitive areas
ant tibia
ant tibial crest
fibular head and neck
fibular nerve
transtibial pressure tolerant area
M-DPT
medial tibial plateau
distal end (rarely, may be sensitive)
patellar tendon
tibia and fibular shafts
is redness ok in pressure sensitive or pressure tolerant areas?
pressure tolerant areas
what is the keel and what can it cause?
keel is shoe arch area of transtibial prosthesis. If it is too short it can cause drop off (early knee flexion in late stance of gait),
total contact cast
used for DM
- to ambulate and dont want weight on ulcers
valgus correction strap (T-strap)
prevents pronation
varus correction strap
prevents supination
bi-channel adjustable ankle locks
- spring to assist DF
- ant peg to stop DF/PF
hinged AFO
- allows DF or PF
- ant stop - prevents DF, allows PF
- post stop - prevents PF, allows DF
solid AFO
restricts all ankle movements
extension aid
- assists knee extension during terminal swing
- external extension aid: elastic web in front of knee axis
- internal fixation: spring within extension aid
- too much extension aid: abrupt knee extension, and delayed knee flexion at IS
Orthosis friction
- controls excessive movement
- initial swing: controls excessive knee flexion
- terminal swing: controls excessive knee extension
- inadequate friction: can lead to early/excessive KF during initial swing or excessive knee extension during TS
