CPT CPT Residual Limb Management & Socket Design

Question 1

What is the primary purpose of residual limb wrapping (shrinker or elastic bandaging) after amputation?

Accepted Answer

Reduce edema and shape the residual limb for prosthetic fitting

Answer

Post-amputation wrapping controls edema and shapes the residual limb into a conical form that facilitates prosthetic socket fitting.

Question 2

Which socket design for transfemoral amputees provides ischial containment by capturing the ischium inside the socket brim?

Accepted Answer

Ischial containment (IC) socket

Answer

The ischial containment socket design encloses the ischial tuberosity within the socket wall, providing improved mediolateral stability compared to the quadrilateral design.

Question 3

What is 'volume fluctuation' in residual limb management and why is it clinically significant?

Accepted Answer

Daily changes in residual limb size that affect socket fit and comfort

Answer

Volume fluctuation refers to day-to-day and activity-related changes in residual limb size that can cause the socket to feel loose or tight, directly impacting prosthetic function.

Question 4

What is the purpose of a prosthetic liner (e.g., silicone, urethane, or thermoplastic elastomer liner)?

Accepted Answer

Provides cushioning, suspension, and skin protection for the residual limb

Answer

Prosthetic liners serve multiple functions including cushioning, skin protection, and often provide the primary or secondary suspension mechanism for the prosthesis.

Question 5

Which condition of the residual limb would most contraindicate the use of a silicone liner for suspension?

Accepted Answer

Fragile or compromised skin with open wounds or active skin breakdown

Answer

Open wounds or fragile skin on the residual limb are contraindications for silicone liner use as the liner's shear forces can worsen skin breakdown.

(CPT) Certified Prosthetic Technician Practice Test

(CPT) Certified Prosthetic Technician Practice Test

CPT CPT Residual Limb Management & Socket Design