Dynamic Assessments: Lower Extremity Amputation

Question 1

What are prosthetic causes of excessive knee flexion?

Answer 1

Heel height too high, stiff heel cushion, excessive ankle dorsiflexion, socket too far anterior/foot too posterior, socket excessively flexed, prosthesis too long.

Question 2

Which of the following is NOT a prosthetic cause of excessive knee flexion?

a) Heel height too high
b) Socket positioned too far posteriorly
c) Excessive ankle dorsiflexion
d) Stiff heel cushion

Answer 2

Answer: b) Socket positioned too far posteriorly

Question 3

A stiff ________ is a prosthetic cause of excessive knee flexion.

Answer 3

heel cushion

Question 4

What anatomical factors contribute to excessive knee flexion?

Answer 4

Knee and/or hip flexion contracture, weakness of quadriceps, pain anteriorly in residual limb, poor balance.

Question 5

Which anatomical cause is likely to increase excessive knee flexion in a patient with a prosthesis?
a) Strong quadriceps
b) Knee or hip flexion contracture
c) Heel height too low
d) Socket excessively extended

Answer 5

b) Knee or hip flexion contracture

Question 6

What is the functional significance of excessive knee flexion?

.

Answer 6

Impaired shock absorption and increased demand on quadriceps to prevent further knee flexion