NPTE Prosthetics Exam Questions with Correct Answers

NPTE Prosthetics Exam Questions with Correct Answers Principal cause of amputation in the elderly? Young? - Answer-Elderly= Vascular Young= trauma Partial foot prsthesis - Answer-plastic socket for remainder of the foot fixed to a rigid plate that extends the length of the inner sole of the shoe; rocker bar to aid late stance; plastic calf shell to retain in the shoe during swing phase! Syme's amputation - Answer-just above the malleoli, all foot bones removed and calcaneal fat pad retained Advantage of Syme's vs transtibial - Answer-Syme's limb is longer which improves prosthetic control and may be able to tolerate significant weight through the limb Reliefs - Answer-concavities in the socket over areas contacting sensitive structures such as bony prominences Buildups - Answer-convexities in the socket over areas contacting pressure-tolerant tissues SACH- solid ankle cushion heel - Answer-Non-articulated Limits sagitial plane motion (primarily to PF) Assists in hyperextension of knee during stance Permits PF in earl stance and allows for small about of M/L and transverse mvmt SAFE- solid ankle flexible endoskeleton - Answer-flexible, nonarticulated Permits more nonsagital plane motion Prescribed for more active individuals Can walk on more uneven terrain (greater M/L motion) Flex foot (Springlite foot): pt population - Answer-Active individuals and athletic Single-axis foot: pt population - Answer-Bilateral transfemoral ampuations Permits PF and DF Allows toe breaks Does not allow medial-lateral motion For a transtibial socket, where should the anterior wall terminate? - Answer-Mid patella or above Transtibial: socket alignment - Answer-slight flexion to enhance loading the patellar tendon and facilitate quad contraction, prevent genu recurvatum, and resist tendency of residual limb to slide too deep in the socket; also slight lateral tilt to reduce load on fibular head Transtibial socket: Relief (Pressure sensitive) - Answer-Anterior tibia Anterior tibia crest Fibular head and neck Fibular nerve