CPO Clinical Application & Fitting 2

Question 1

During transtibial prosthetic fitting, a patient reports pistoning of the socket during ambulation. Which adjustment is most appropriate?

Accepted Answer

Increase suspension by adding a pin lock or suction

Answer

Widen the proximal trim line

Answer

Add distal padding to the socket

Answer

Reduce socket volume by 10%

Question 2

A patient with a transfemoral amputation experiences medial distal thigh pain during the stance phase. The most likely cause is:

Accepted Answer

Insufficient adduction of the socket

Answer

Excessive adduction of the socket

Answer

High lateral wall trim line

Answer

Inadequate total contact

Question 3

When fitting a PTB (patellar tendon bearing) socket, which anatomical landmark is considered the primary load-bearing area?

Accepted Answer

Patellar tendon

Answer

Fibular head

Answer

Tibial crest

Answer

Medial tibial flare

Question 4

A child with a below-knee limb deficiency is fitted with a prosthesis. The parent asks about growth management. The BEST practice is:

Accepted Answer

Modify the socket with growth pads and schedule regular check-ups

Answer

Replace the prosthesis every 6 months regardless of fit

Answer

Use adult-sized components to delay replacement

Answer

Discourage prosthetic use until skeletal maturity

Question 5

Which of the following best describes the function of a SACH (Solid Ankle Cushion Heel) foot?

Accepted Answer

Simulates ankle motion through heel wedge compression

Answer

Stores and returns energy during push-off

Answer

Provides dynamic response for high-activity users

Answer

Allows multiaxial motion for uneven terrain

Question 6

For a patient with a Syme's amputation, the most important socket design consideration is:

Accepted Answer

Accommodating the bulbous distal end while allowing donning

Answer

Providing a high proximal brim for suspension

Answer

Positioning the knee joint anteriorly

Answer

Maximizing socket volume to reduce weight bearing

Question 7

A transfemoral patient ambulates with a lateral trunk lean toward the prosthetic side during stance. Which prosthetic cause should be investigated first?

Accepted Answer

Insufficient socket adduction

Answer

Excessive knee friction

Answer

Short prosthetic length

Answer

Excessive dorsiflexion at the prosthetic ankle