DPT 708 KAFO, HKFOS, AND KOS EXAM QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
LATEST UPDATE
When do you need to consider KAFOs?
With excessive movement at the knee during stance phase
*quad or hamstring weakness
What must the hamstrings and quads do during first rocker flexion moment at the
knee?
Quads must contract to prevent knee collapsing into further flexion
Hamstrings contract to stabilize hip
What does the gastroc need to eccentrically control during first rocker?
The forward progression of the tibia
Is gastroc critical with closed or open chain knee control?
Closed
For a locked knee KAFO, is there a high or low energy expenditure?
HIGH!!
For a stance controlled KAFO, what does it help with?
Knee flexion during swing, stability during stance, dec energy cost and dec gait
deviations
When can you NOT use a stance controlled KAFO?
, Patient is over >220/300 pounds, spasticity, uncontrolled knee hyperextension,
substantial LLD, knee flex contractures or cognitive deficits
When is the unstable point with the gait cycle when using a stance control
KAFO?
Terminal stance when it unlocks
When do you not use a thermoplastic KAFO?
Obesity and fluctuating edema
At what spinal cord level can a person with paraplegia use a swing to or swing
through gait with bilateral KAFOs for gait?
T11-L2 **put its a LOT more energy expenditure
In regards to ambulation in a person that has T11-L2 paraplegia does energy
consumption inc or dec with DF stops and a long sole plate?
DECREASE
Are there positives to a person who has paraplegia and wants to ambulate?
Yes with potentially less osteoporosis and ectopic bone formation as well as fewer
bladder stones but unsure if the cost is worth it with the amount of muscle contraction
needed to make high enough compressive forces
If a KAFO has a free knee joint, is it anterior or posterior offset?
Posterior hip
When is a metal KAFO indicated?
When max strength and durability is needed
Significant obesity and fluctuating edema
Advantages vs. disadvantages of a thermoplastic KAFO?
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
LATEST UPDATE
When do you need to consider KAFOs?
With excessive movement at the knee during stance phase
*quad or hamstring weakness
What must the hamstrings and quads do during first rocker flexion moment at the
knee?
Quads must contract to prevent knee collapsing into further flexion
Hamstrings contract to stabilize hip
What does the gastroc need to eccentrically control during first rocker?
The forward progression of the tibia
Is gastroc critical with closed or open chain knee control?
Closed
For a locked knee KAFO, is there a high or low energy expenditure?
HIGH!!
For a stance controlled KAFO, what does it help with?
Knee flexion during swing, stability during stance, dec energy cost and dec gait
deviations
When can you NOT use a stance controlled KAFO?
, Patient is over >220/300 pounds, spasticity, uncontrolled knee hyperextension,
substantial LLD, knee flex contractures or cognitive deficits
When is the unstable point with the gait cycle when using a stance control
KAFO?
Terminal stance when it unlocks
When do you not use a thermoplastic KAFO?
Obesity and fluctuating edema
At what spinal cord level can a person with paraplegia use a swing to or swing
through gait with bilateral KAFOs for gait?
T11-L2 **put its a LOT more energy expenditure
In regards to ambulation in a person that has T11-L2 paraplegia does energy
consumption inc or dec with DF stops and a long sole plate?
DECREASE
Are there positives to a person who has paraplegia and wants to ambulate?
Yes with potentially less osteoporosis and ectopic bone formation as well as fewer
bladder stones but unsure if the cost is worth it with the amount of muscle contraction
needed to make high enough compressive forces
If a KAFO has a free knee joint, is it anterior or posterior offset?
Posterior hip
When is a metal KAFO indicated?
When max strength and durability is needed
Significant obesity and fluctuating edema
Advantages vs. disadvantages of a thermoplastic KAFO?
