KAFO

Question 1

KAFO metal design with thigh component; used for patients with SCI

Key design factor: ankle in 10° dorsiflexion

Answer 1

Scott-Craig Orthosis

Question 2

Orthotic stability of knee, ankle and foot, passive ligament stability at hip

Answer 2

Scott-Craig Orthosis

Question 3

Components of KAFO

Answer 3

AFO + 2 Metal uprights

+ mechanical knee jt. + two thigh bands

Question 4

Allows knee flexion but prevents hyperextension with hyperextension stop

For recurvatum or mediolateral instability

Answer 4

METAL DESIGN: Single axis, straight set

Question 5

Unrestricted knee flexion and extension with hyperextension stop

Also for for recurvatum or mediolateral instability

Answer 5

METAL DESIGN: Polycentric knee joint (Double axis)

Question 6

Axis is posterior to uprights;

This orthosis allows knee to bend during swing phase and permit sitting

Answer 6

METAL DESIGN: Posterior Offset

Question 7

NOT used in knee or hip flexion contracture and AFO with plantarflexion stop

Answer 7

METAL DESIGN: Posterior Offset

Question 8

Most common knee lock;

With catching mechanism in 12 degree increments

Answer 8

Ratchet Lock

Question 9

Knee lock that controls flexion; attached to both uprights making it simple, effective, & sturdy

May bind in knee flexion contracture or spasticity

Answer 9

Drop-ring

Question 10

Easier to release with a flexion force;

Lever arm (bail) attached to the pawl needs to be pulled upward for release

Answer 10

Pawl lock

Question 11

Also called French, Schweitzer, or Swiss lock

Answer 11

Pawl lock

Question 12

Used to stabilize the knee in varying amounts of flexion;

More precise for knee flexion contracture

Answer 12

Dial lock

Question 13

Variants of metal KAFO design;

Lacks medial upright

Answer 13

Single upright orthosis

Question 14

KAFO that accommodates longitudinal and circumferential growth

Answer 14

KAFO plastic-metal design

Question 15

Components of plastic-metal design KAFO

Answer 15

AFO + Plastic shells + metal uprights attached by screws or rivets + knee joint + straps

Question 16

_______ of proximal thigh shell control rotation

Answer 16

Quadrilateral shape

Question 17

Can incorporate ischial seat for weightbearing

Answer 17

KAFO plastic-metal design

Question 18

KAFO plastic design that resists recurvatum & provides mediolateral stability;

Indicated for knee extensor weakness

Answer 18

Supracondylar KAFO

Question 19

_________ portion of plastic KAFO design limits subtalar motion and places the ankle in slight plantarflexion

Answer 19

Distal

Question 20

Drawbacks of Supracondylar KAFO

Answer 20

Proximal portion protrudes in sitting; NOT for bilateral use

Question 21

Indications for PLASTIC and PLACTIS-METAL design

Answer 21

For close fit, precise control of pressure, & maximum foot control