COF Lower Extremity Orthotics 3

Question 1

A patient with Charcot-Marie-Tooth disease who walks with a cavus foot deformity and drop foot would be BEST served by:

Accepted Answer

A prefabricated dorsiflexion-assist AFO with lateral forefoot post

Answer

A dorsiflexion-assist AFO addresses drop foot while a lateral forefoot post accommodates the cavus and supination tendency common in CMT.

Question 2

During gait analysis, a patient wearing a solid AFO demonstrates excessive knee flexion at loading response. The MOST likely cause is:

Accepted Answer

AFO set in too much dorsiflexion

Answer

Excessive AFO dorsiflexion creates a plantarflexion-inhibited rollover, generating a flexion moment at the knee during loading response.

Question 3

A fitter is evaluating a KAFO for a patient with post-polio syndrome. The patient has weak quadriceps (2/5) but intact hip extensors. The MOST appropriate knee joint is:

Accepted Answer

Bail lock knee joint

Answer

A bail lock allows the patient to release the lock by pressing the bail against a chair, enabling easy sitting while providing stance-phase stability.

Question 4

In orthotic management of tibialis posterior tendon dysfunction (TPTD) Stage II, the goal of the orthosis is to:

Accepted Answer

Support the medial longitudinal arch and limit subtalar eversion while allowing some motion

Answer

Stage II TPTD (flexible deformity) is managed with semi-rigid orthoses that support the arch and reduce subtalar eversion without eliminating all motion.

Question 5

A child with cerebral palsy (spastic diplegia) requires an AFO that blocks plantarflexion but allows free dorsiflexion. This design is called a(n):

Accepted Answer

Posterior stop AFO

Answer

A posterior stop AFO uses a posterior trimline or mechanical stop that limits plantarflexion while permitting dorsiflexion, reducing toe walking.

(COF) Certified Orthotic Fitter Practice Test

(COF) Certified Orthotic Fitter Practice Test

COF Lower Extremity Orthotics 3