KO

Question 1

Components of KO

Answer 1

Thigh & calf cuffs joined by side bars
Flexion-extension joint
Pressure pad

Question 2

Primarily protects knee from mediolateral forces

Answer 2

Pressure pad

Question 3

Flexion–extension control through ______________

Answer 3

Hyperextension stop or drop lock

Question 4

Typical KO may incorporate _______ to follow natural motion of anatomical knee joint

Answer 4

Polycentric joint (double axis)

Question 5

2 basic designs for polycentric joint in KO

Answer 5

2 meshing gears (fixed) or plate with 2 pivots (adapts)

Question 6

Variant of typical KO from thermoformed plastic with more accurate force application and
distribution

Answer 6

Miami

Question 7

In the Miami KO variant, the ______ wedge prevent

downward slippage

Answer 7

Medial suspension

Question 8

CARS-UBC

Answer 8

Canadian Arthritis Research Symposium-Univ. British Columbia

Question 9

Consists of 2 plastic cuffs connected by telescoping

rod that is placed laterally (valgum) or medially (varum)

Answer 9

Canadian Arthritis Research Symposium-Univ. British Columbia

Question 10

KO variant with NO control of axial rotation

Answer 10

CARS-UBC

Question 11

Restricts hyperextension but with not much mediolateral stability

Answer 11

Swedish knee cage

Question 12

More cosmetic because of pivotal strap attachment;

Has lateral and medial uprights that gives slight
mediolateral stability

Answer 12

Three-way knee stabilizer

Question 13

More control of recurvatum with firm mediolateral stabilization

It does not interfere with knee flexion and has rigid support

Answer 13

Supracondylar KO

Question 14

Suprapatellar portion protrudes in sitting

Answer 14

Supracondylar KO

Question 15

Provides angular control in

frontal and sagittal planes

Answer 15

KO axial control (Lennox Hill Derotation Orthosis & Lerman Multi-ligamentous knee control orthosis)

Question 16

This is to limit flexion (3)

Answer 16

1. Anteriorly directed force on posterior proximal thigh
2. Posteriorly directed force on anterior surface of the knee (either directly over the patella or a combination of support just proximal and just distal to the patella)
3. Anteriorly directed force on posterior aspect of the calf

Question 17

Most commonly with medial

compartment narrowing

Answer 17

OA KO

Question 18

Drawback of OA KO

Answer 18

Cannot support adequately

with obese person.

Question 19

Foam is added, which encircles the knee below the patella;

Worn during activity

Answer 19

Infrapatellar strap

Question 20

Elastic sleeve with patella cutout

Answer 20

Palumbo

Question 21

Palumbo as 2 circumferential rubber straps which provides _____________ to patellar pad

Answer 21

dynamic tension

Question 22

The 1 counterforce strap in Palumbo maintains pad position & avoid _____

Answer 22

axial rotation