BKA Prosthetic Components

Question 1

How long is a temporary prosthesis usually used for?

Answer 1

3-6 months after surgery

Question 2

Which BKA suspension is fitted immediately above the femoral epicondyles and can be used with or without a fork strap and waist-belt

Answer 2

Supracondylar cuff suspension

Question 3

What kind of prosthesis does a patient with a small toe amputation need?

Answer 3

Usually no prosthesis is needed

Question 4

For syme’s prosthesis, how far up should trim line go?

Answer 4

To the patellar tendon

Question 5

What BKA suspension is used when patellar tendon can’t tolerate weight or when knee joint is unstable

Answer 5

Thigh corset

Question 6

What is the benefit of a supracondylar brim suspension?

Answer 6

Better mediolateral support

Question 7

3 prosthetic feet available for syme’s amputation

Answer 7

1. Solid Ankle Cushion Heel (SACH foot)
2. Stationary Ankle Flexible Endoskeleton (SAFE foot)
3. Energy-storing carbon fiber (low profile foot)

Question 8

Which BKA suspension has medial and lateral walls extending above the femoral epicondyles

Answer 8

Supracondylar brim suspension

Question 9

What BKA suspensions can be used for athletes?

Answer 9

Suction and pin

Question 10

What is a disadvantage of using a sleeve suspension for BKA?

Answer 10

Increased perspiration

Question 11

Which BKA suspension do you use to prevent genu recurvatum?

Answer 11

Supracondylar-suprapatellar brim suspension

Question 12

3 socket design options for syme’s amputation

Answer 12

1. Posterior opening
2. Medial opening
3. Stovepipe

Question 13

Which BKA suspension provides the most medial-lateral and anterior-posterior stability

Answer 13

Thigh Corset

Question 14

How is the PTB socket aligned?

Answer 14

Slight flexion and slight lateral tilt

Question 15

Disadvantage of supracondylar cuff suspension

Answer 15

Minimal medial-lateral stability and considerable pistoning

Question 16

Is the medial or the lateral tibial flare a pressure-tolerant area?

Answer 16

Medial tibial flare

Question 17

5 pressure-sensitive areas when using a patellar tendon bearing socket

Answer 17

1. Tibial crest, tubercle and condyles
2. Fibular head
3. Patella
4. Hamstring tendons
5. Distal tibia and fibula

Question 18

What kind of prosthesis does a patient with a great toe amputation need?

Answer 18

Stiff sole, toe filler, molded insole, arch support

Question 19

Most commonly used socket for BKA

Answer 19

Patellar Tendon Bearing Socket

Question 20

What is the advantage of a suction BKA suspension?

Answer 20

Does not create pressure distributions

Question 21

What is the main disadvantage of syme’s amputation prosthetic fitting

Answer 21

Poor cosmesis because of the bulbous distal residual limb

Question 22

Disadvantage of thigh corset

Answer 22

Very heavy and not well tolerated