Prosthetic Fabrication & Assembly Techniques Flashcards
7 cards from real CPT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Prosthetic Fabrication & Assembly Techniques flashcards as text
Which vacuum level range is recommended during diagnostic socket lamination to ensure adequate resin infusion without voids?
Answer: 25–29 inHg
A vacuum level of 25–29 inHg (near atmospheric) ensures thorough resin wet-out and void-free lamination in prosthetic socket fabrication.
A transfemoral socket exhibits a medial brim that is too high, likely causing:
Answer: Perineal pressure and adductor roll
An overly high medial brim creates pressure against the perineum and adductor tissue, commonly called adductor roll.
When grinding the inner surface of a laminated socket to relieve a pressure area, the technician should use:
Answer: A drum sander at low speed with light pressure
A drum sander at low speed with light pressure allows controlled, gradual material removal without burning or delaminating the composite layers.
The primary function of a flexible inner socket (FIS) combined with a rigid frame is to:
Answer: Allow soft-tissue displacement while maintaining structural integrity
A flexible inner socket allows the residual limb tissues to expand and displace naturally, while the rigid outer frame maintains alignment and structural support.
During exoskeletal (crustacean) prosthesis fabrication, the wood block carving for the thigh section must be shaped to accommodate:
Answer: Structural load transfer along the medial and lateral walls
The carved wood shank of an exoskeletal prosthesis must distribute structural loads along the medial and lateral walls to maintain integrity during ambulation.
What is the correct torque specification process when installing a pyramid adapter to a prosthetic foot?
Answer: Use a torque wrench set to the manufacturer's specified value
Manufacturers specify precise torque values for pyramid adapters; using a calibrated torque wrench prevents under- or over-tightening that could cause component failure.
When fabricating a supracondylar suspension transtibial socket (SC/SP), the medial and lateral trim lines must be:
Answer: Above the femoral condyles to capture them for suspension
The SC/SP design achieves suspension by extending the socket trim lines above the femoral condyles, locking the socket onto the condyles.