KAFO

Question 1

• is a hinge placed posterior
  to the midline of the leg.
• Stabilizes the knee in
  extension during the early
  stance phase of gait.
• does not hamper knee
  flexion during swing or
  sitting.
• May flex inadvertently
  when the wearer walks
  down on steep ramps.
• CI: knee flexion contracture

Answer 1

Offset Knee joint

Question 2

• MOST COMMON
• Manually and gravity
  manipulated
• Challenging for patients
  with limited hand function
• When the client stands with
  the knee fully extended, the
  ring drops, preventing the
  uprights from bending.
  Although both medial
  and lateral joints should be
  locked for maximum
  stability.
• CI: knee flexion contracture

Answer 2

Drop ring lock

Question 3

• The pawl is a spring-loaded
  projection that fits into a
  notched disk.
• Provides simultaneous
  locking of both uprights
• Unlocks by pulling up of
  bails
• For patients with dexterity
  problems
• Disadvantage: Increase
  energy expenditure – bulky

Answer 3

Pawl lock with bail release

Question 4

• Allows joint locking at
  different angles of knee
  flexion
• For patients who cannot
  achieve full passive knee
  extension
• Indication: patients with
  knee flexion contracture

Answer 4

Serrated knee lock

Question 5

Makes knee stable

Answer 5

sagittal stability

Question 6

• Plastic calf shells are shaped
  to apply corrective force
• Genu valgum:
  ▪ the medial portion of the
  shell extends proximally in
  order to apply laterally
  directed force at the knee.
• Genu Varum:
  ▪ lateral side extends
  proximally in
  order to apply medial
  directed force at
  the knee

Answer 6

Genu Valgum/Varum Correction

Question 7

To eliminate all weight-bearing through the lower extremity, the
orthosis must include:

Answer 7

o a weight-bearing brim
o a locked knee joint
o patent bottom