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Orthotics (KAFO)(HKAFO) Questions with Detailed
Verified Answers (100% Correct Answers) /Already Graded
A+
Knee Ankle Foot Orthosis (KAFO)
Ans: Orthotic encompassing knee and ankle joints
Hip Knee Ankle Foot Orthosis (HKAFO)
Ans: Orthotic encompassing ankle, knee, and or one or both hip joints
When to Consider KAFO?
Ans: Inability to control knee flexion moment in early stance
Stability compromised
Genu recurvatum, abnormal varus/valgus in stance
Types of Orthotic Knee Joints
Ans: Non-locking
Locking
Stance Control
KAFO Considerations
Ans: Internal muscle power must be able to counteract the GRF for stance
stability
Single Axis Free Joint
Ans: Allows unrestricted flexion and extension in the sagittal plane; Most
designs prevent hyperextension while providing M/L stability
Types of Non-locking Knee Joints
Approved By:
vPretest - Stuvia US
, 2
Ans: Single-Axis
Offset knee
Dial lock/Adjustable Locking
Offset Knee joint/ Posterior offset
Ans: Knee joint is set more posterior to decrease the external flexion
moment placed on the knee in early stance
Variable Position Orthotic knee/Dial lock/Adjustable locking knee
Ans: Used with pts with knee flexion contractors; Knee is locked in its most
extended position but has an adjustable dial to increase ROM
Locking Knee Joints
Ans: Single Axis Locking Knee
When to use locking knee joint
Ans: Pts with severe varus or values and instability of the knee in stance
Locking mechanisms of Knee joints
Ans: Ring or drop lock
Drop lock bail lock
Stance Control Orthotic Knee Joint (SC-KAFOs)
Ans: Appropriate for patients with quad weakness
Provide stance control without keeping knee extended during swing phase of
gait
Indications for SC-KAFO
Ans: Muscle strength of at least 3/5 hip extensors and flexors and full
extension of the knee joint
Contraindications for SC-KAFO
Approved By:
vPretest - Stuvia US
Orthotics (KAFO)(HKAFO) Questions with Detailed
Verified Answers (100% Correct Answers) /Already Graded
A+
Knee Ankle Foot Orthosis (KAFO)
Ans: Orthotic encompassing knee and ankle joints
Hip Knee Ankle Foot Orthosis (HKAFO)
Ans: Orthotic encompassing ankle, knee, and or one or both hip joints
When to Consider KAFO?
Ans: Inability to control knee flexion moment in early stance
Stability compromised
Genu recurvatum, abnormal varus/valgus in stance
Types of Orthotic Knee Joints
Ans: Non-locking
Locking
Stance Control
KAFO Considerations
Ans: Internal muscle power must be able to counteract the GRF for stance
stability
Single Axis Free Joint
Ans: Allows unrestricted flexion and extension in the sagittal plane; Most
designs prevent hyperextension while providing M/L stability
Types of Non-locking Knee Joints
Approved By:
vPretest - Stuvia US
, 2
Ans: Single-Axis
Offset knee
Dial lock/Adjustable Locking
Offset Knee joint/ Posterior offset
Ans: Knee joint is set more posterior to decrease the external flexion
moment placed on the knee in early stance
Variable Position Orthotic knee/Dial lock/Adjustable locking knee
Ans: Used with pts with knee flexion contractors; Knee is locked in its most
extended position but has an adjustable dial to increase ROM
Locking Knee Joints
Ans: Single Axis Locking Knee
When to use locking knee joint
Ans: Pts with severe varus or values and instability of the knee in stance
Locking mechanisms of Knee joints
Ans: Ring or drop lock
Drop lock bail lock
Stance Control Orthotic Knee Joint (SC-KAFOs)
Ans: Appropriate for patients with quad weakness
Provide stance control without keeping knee extended during swing phase of
gait
Indications for SC-KAFO
Ans: Muscle strength of at least 3/5 hip extensors and flexors and full
extension of the knee joint
Contraindications for SC-KAFO
Approved By:
vPretest - Stuvia US
