Flashcards in Orthotics Deck (18):
What is the three-point pressure principle?
forms the mechanical basis for orthotic intervention
- single force at area of deformity
- two more counterforces act in opposing direction
What shoe insert can be used to move pressure from met heads to metatarsal shafts? Where would it be placed? Why is this used?
- placed posterior to met heads
- allows for more pushoff in weak or inflexible feet
What insert can be used to relieve strain on plantar fascia during initial heel contact?
The anterior stop in an AFO controls what?
amount of DF
What stop would be used to control the excessive bucking occurring in a patient's knee?
posterior stop (PF stop)
What stop would be used to control the excessive hyperextension occurring in a patient's knee?
anterior stop (DF stop)
What is a posterior leaf spring AFO primarily used for?
prevent drop foot
What is a minerva brace used for?
scoliosis (it's a CTLSO)
What patients might you see using a resting hand splint? What is the hand positioned in?
wrist held in 10-20deg ext
thumb in partial abduction/opposition
*patients with this: RA, carpal bone fracture, colle's fracture, stroke with paralysis, carpal tunnel syndrome
What does the airplane splint position the arm in? What is this used for?
used for burns
- elbow at 90, shoulder 90abd
A patient with an AFO demonstrates circumduction during gait. What could be causing this?
1) muscular: weak hip/knee/dorsiflexors, knee hyperextension
2) orthoses issue: excessive PF caused by inadequate stop
*** AKA things that make that swing leg TOO LONG***
Which of the following would you NOT expect to cause excessive lateral trunk bending in an orthotic?
a) KAFO medial upright too high
b) too much shoe lift
c) hip pain
d) weak/tight abductors on orthotic side
e) short leg
f) poor balance
e) NONE of the above
B) because an INSUFFICIENT shoe lift would cause you to bend to that side, not too MUCH shoe lift
T/F: Hyperextension at the knee might be caused by an inadequate dorsiflexion stop.
false, inadequate PF stop
T/F: Initial contact toes first might be caused by an inadequate plantarflexor stop.
- or inadequate heel lift, short leg, heel pain, extensor spasticity
T/F: Weak invertors can cause excessive pronation.
Why might a patient stand in an abducted stance with a LE orthotic?
sound limb too short (has to prop out on AFO limb)
T/F: Inversion sprains of the ankle should be taped in an everted position.
true: want ligaments that are damaged to be lax, not taped into a position where they're stretched further