Exam 1

Question 1

Does a PTB socket allow for volume change

Answer 1

No

Question 2

Is PTB socket tight or loose AP?

Answer 2

tight

Question 3

Pressure tolerant areas (6)

Answer 3

Patellar ligament
Anterior Compartment
Posterior Compartment
Lateral shaft of fibula
Medial shaft of tibia
Medial tibial flare

Question 4

Pressure sensitive areas (7)

Answer 4

Lateral tibial flare
Anterior tibial tubercle
Crest of tibia
Distal end of tibia
Distal end of fibula
Head of fibula
Hamstring tendons

Question 5

Why is a TT socket tipped in 5 degrees of knee flex?

Answer 5

to prevent distal end weight bearing

Question 6

What is one purpose of a temporary prosthesis

Answer 6

densentization

Question 7

Inset of the foot creates what

Answer 7

Genu varus at MSt

Question 8

What is the function of genu varus during gait (4)

Answer 8

1. ) Narrow BOS
2. ) Mimics anatomical gait
3. ) Loads and offloads appropriate structures
4. ) Stresses LCL> MCL

Question 9

How many ply sock used between skin and hard socket in TT

Answer 9

3-5

Question 10

Hard socket (TT) is good for those with what

Answer 10

hygiene issues

Question 11

What must someone have to use a hard socket (TT)

Answer 11

intact sensation and soft tissue protection over bony prominences

Question 12

What is a soft interface or insert used for?

Answer 12

Mature limbs with less soft tissue coverage or limbs with more bony prominences

Question 13

Revise socket when how many ply needed

Answer 13

more than 10

Question 14

Most common interface between hard socket and RL

Answer 14

socks

Question 15

3 Functions of socks:

Answer 15

1. ) Cushion WB forces applied to RL
2. ) Helps with volume control
3. ) Moisture wicking

Question 16

3 Functions of Suspension Systems:`

Answer 16

1. ) Holds prosthesis to RL
2. ) Allows patient to sit comfortably
3. ) Minimizes movement of socket on RL

Question 17

TT: Indications for Suction suspension (3)

Answer 17

1. ) Good subcutaneous tissue
2. ) At least fair UE function
3. ) Pt who wants fewer straps

Question 18

TT: Advantages for suction suspension (3)

Answer 18

1. ) excellent suspension
2. ) incr proprioception
3. ) reduces torque

Question 19

TT: Disadvantages for suction suspension (3)

Answer 19

1. ) Tough to don/doff
2. ) Requires good hygiene
3. ) Durability of silicone liners not great

Question 20

5 types of TT suspension systems

Answer 20

1. ) Suction
2. ) Knee Sleeve
3. ) Supracondylar Cuff
4. ) Supracondylar Suprapatellar
5. ) Joints and corset

Question 21

TT: Indications for Sleeve Suspension (3)

Answer 21

1. ) Good ligaments
2. ) Juveniles
3. ) Long RL

Question 22

TT: Advantages for sleeve suspension (5)

Answer 22

1. ) Excellent suspension over patella
2. ) Adjustable
3. ) Conceals trim lines, more cosmetic
4. ) Constriction is minimal
5. ) Simple to use, lightweight

Question 23

TT: Disadvantages for sleeve suspension (6)

Answer 23

1. ) Can cause skin issues due to incr perspiration (need to clean daily)
2. ) Tough to don/doff
3. ) Knee flex can cause some bunching of material behind the knee
4. ) Holes can reduce suction
5. ) No added true knee stability

Question 24

TT: Indications for Supracondylar Cuff (3)

Answer 24

1. Good ligaments
2. Current user
3. One who can’t tolerate other types of suspension

Question 25

TT: Advantages for Supracondylar cuff (3)

Answer 25

1. Unencumbered knee flexion
2. Easy to don/doff
3. Can use waist belt

Question 26

TT: Disadvantages for Supracondylar cuff (4)

Answer 26

1. Pistons easily
2. Not added M/L stability
3. Can restrict or pinch in knee flexion
4. Excess soft tissue around distal thigh may impinge

Question 27

Main socket types for TT

Answer 27

1. ) Patellar tendon bearing

2. ) Total surface bearing

Question 28

TT: Indications for Joint and Corset Suspension (4)

Answer 28

1. ) Instability of knee
2. ) Unload an ultra sensitive RL
3. ) Patient preference
4. ) Heavy duty user

Question 29

TT: Advantages for Joint and Corset Suspension (3)

Answer 29

1. ) Incr overall stability
2. ) Shared WB on thigh, less on RL
3. ) Increases proprioceptive feedback

Question 30

TT: Disadvantages for Joint and Corset Suspension (5)

Answer 30

1. ) Not hygienic
2. ) heavy
3. ) not cosmetic
4. ) long fabrication time
5. ) Hassle of applying it

Question 31

TT: Indications for Supracondylar Suspension (4)

Answer 31

1. ) Pt needed M-L stability
2. ) Pt wanting unrestricted knee extension
3. ) Patients preferring fewer straps
4. ) Shorter RL

Question 32

TT: Advantages for Supracondylar suspension (3)

Answer 32

1. ) Allows open patella for kneeling
2. ) Improved cosmesis due to patellar opening
3. ) Fairly easy to don/doff

Question 33

TT: Disadvantages for supracondylar suspension (2)

Answer 33

1. ) Large of fleshy thigh

2. ) Reduced cosmesis

Question 34

TT: Indications for Supracondylar suprapatellar suspension (3)

Answer 34

1. ) Short RL
2. ) Knee requires ML/AP stability
3. ) Patients who want fewer straps

Question 35

TT: Advantages for Supracondylar suprapatellar suspension (3)

Answer 35

1. ) Incr WB surface
2. ) Incr ML and AP stability
3. ) Knee hyperextension control

Question 36

TT: Disadvantages for Supracondylar suprapatellar suspension (4)

Answer 36

1. ) Enclosed patella limits kneeling
2. ) Large thigh girth inhbits good suspension
3. ) Reduced cosemsis
4. ) Requires skilled fabricator