CFO Case Analysis & Practical Application 2 — Questions and Answers
Question 1: A 68-year-old diabetic patient presents with neuropathic ulceration at the first metatarsal head. After wound closure, which orthotic feature is MOST critical in the accommodative device?
- Total contact fit with pressure redistribution (Correct answer)
- Rigid carbon fiber plate for propulsion
- Lateral wedging to shift weight medially
- High heel cup to limit rearfoot motion
Correct answer: Total contact fit with pressure redistribution
Total contact fit redistributes plantar pressure away from vulnerable areas, which is essential for diabetic ulcer prevention and healing.
Question 2: A runner with chronic plantar fasciitis reports pain that is worst with first morning steps. Which orthotic modification most directly addresses this presentation?
- Heel cup with medial longitudinal arch support and slight heel lift (Correct answer)
- Metatarsal pad placed distal to the 2nd–4th metatarsal heads
- Full-length rigid plate with no intrinsic posting
- Lateral flare to reduce supination
Correct answer: Heel cup with medial longitudinal arch support and slight heel lift
A heel cup combined with arch support reduces tension on the plantar fascia, and a slight heel lift decreases the strain at its calcaneal insertion.
Question 3: A pediatric patient (age 9) has flexible flatfoot with no pain but demonstrates in-toeing gait. Which clinical finding would most indicate a need for orthotic intervention?
- Knee and hip pain associated with the deformity (Correct answer)
- Radiographic arch collapse only when weight-bearing
- Shoe wear pattern showing medial heel erosion
- Parent concern about cosmetic appearance
Correct answer: Knee and hip pain associated with the deformity
Orthotics are indicated in flexible flatfoot when the deformity produces functional symptoms such as knee or hip pain, not based on appearance alone.
Question 4: A patient post-CVA has equinovarus foot drop. An AFO is prescribed. Which design best addresses both foot drop and the varus component?
- Solid AFO with lateral trim lines extended to control varus (Correct answer)
- Posterior leaf spring AFO trimmed posterior to the malleoli
- Supramalleolar orthosis with medial post only
- Dynamic AFO with dorsiflexion assist spring only
Correct answer: Solid AFO with lateral trim lines extended to control varus
A solid AFO with extended lateral trim lines provides both ankle dorsiflexion support and controls the inversion/varus component of equinovarus.
Question 5: When evaluating a patient for a custom foot orthosis, the fitter notices that the subtalar joint neutral position creates a forefoot varus of 8°. What is the appropriate clinical response?
- Post the forefoot medially with an intrinsic or extrinsic forefoot post (Correct answer)
- Add a heel cup without any forefoot correction
- Apply lateral rearfoot posting to compensate
- Order a rigid orthosis without modification
Correct answer: Post the forefoot medially with an intrinsic or extrinsic forefoot post
Forefoot varus requires a medial forefoot post to bring the forefoot into neutral alignment with the supporting surface.
Question 6: A patient with rheumatoid arthritis presents with significant metatarsalgia and subluxed MTP joints. Which orthotic intervention is most appropriate?
- Metatarsal pad proximal to the metatarsal heads with accommodative forefoot cushioning (Correct answer)
- Rigid carbon plate extending to the toes
- Lateral wedging to off-load the lateral forefoot
- Thomas heel extension without forefoot modification
Correct answer: Metatarsal pad proximal to the metatarsal heads with accommodative forefoot cushioning
Proximal metatarsal pads redistribute pressure away from subluxed MTP joints, and accommodative cushioning reduces shear in fragile RA tissue.
Question 7: A 45-year-old construction worker reports lateral ankle instability after multiple sprains. Orthotic treatment should focus on which primary biomechanical goal?
- Limiting excessive subtalar inversion and promoting proprioceptive feedback (Correct answer)
- Increasing medial longitudinal arch height to redistribute load
- Reducing tibial torsion through rotational posting
- Elevating the heel to reduce Achilles tendon strain
Correct answer: Limiting excessive subtalar inversion and promoting proprioceptive feedback
Controlling inversion at the subtalar joint and enhancing proprioception are the primary orthotic goals in chronic lateral ankle instability.
CFO Case Analysis & Practical Application 2
A 68-year-old diabetic patient presents with neuropathic ulceration at the first metatarsal head.
After wound closure, which orthotic feature is MOST critical in the accommodative device?