Trans Tibial Oral Questions

Question 1

Standard TT Bench Alignment

Answer 1

• 5 Deg socket flexion
• 5 Deg socket adduction
• top of Px foot is level in both of saggital and frontal plane
• medial border of foot parallel to line of progression

Question 2

List 4 prosthetic causes for rapid knee flexion

Answer 2

socket too far anterior
heel lever too long
different heel heights
stiff heel action

Question 3

List 2 types of Symes Prostheses with advantages and disadvantages

Answer 3

1. canadian/VAPC-Advantage: don prosthesis easily, medial door stronger than posterior
2. expandable wall- Advantages: easy to don, no closures, good for the blind. Disadvantages: limited strectch

Question 4

what causes TT px to appear to be higher than sound leg when sitting?

Answer 4

Posterior brim too high
not enough hamstring relief
incorrect length

Question 5

What causes anterior distal tibia pressure?

Answer 5

AP to big
Post-brim too low
not enough relief
excessive use of knee extension
heel lever to long
excessive initial socket flexion

Question 6

List 2 causes of distal limb edema and discoloration

Answer 6

Lack of total contact

short socket

Question 7

What is the purpose of the 5 Deg of flexion and adduction in the socket during bench alignment?

Answer 7

5 deg of flexion:
-in order to elongate the quads so they are better equipped to accept the full weight of the body and aid in shock absorption during loading response.
5 deg of adduction:
-ensures that the foot is sufficiently inset to create the appropriate varus moment during stance which loads the residual limb properly.