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17 Cards in this Set
- Front
- Back
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Advantages of carbon fiber feet
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- stiff
- high weight/strength ratio |
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Biggest goal of socket design
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eliminate pseudoarthrosis between socket and prosthesis; Think of socket interface as a joint
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Main weight bearing area on patellar tendon bearing socket desing
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* medial tibial flare
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4 major categories of reasons for LE amputation
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- Peripheral vascular disease 70-80%
- Trauma 20-25% - Congenital - Tumor |
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In transtibial amputation, tibial position in LR
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anterior
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In transtibial amputation, tibial position in terminal stance
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posterior
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How do you determine ground force reaction vector
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connect center of pressure with just anterior to S1-2
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Effect of heel position on knee flexion moment
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posterior foot increases knee flexion moment
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Effect of heel firmness on knee flexion moment
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increased heel firmness increases knee flexion moment
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4 common ways to try to deal with skin breakdown over patellar tendon
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- move foot posteriorly
- use softer keel - use shorter foot - add ankle |
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Effect of keel firmness on knee extension moment
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increased keel firmness increases knee extension moment
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In transtibial ampuation varus angulation = socket _____
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abducted
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What should you assume about prosthetic knees and power
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assume that a prosthetic knee has no power
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What is the stability reference line?
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- substitute for ground force reaction
- line from trochantor, knee, ankle |
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2 important patient factors in ability of AKA to stabilize knee
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* hip extensor strength
- limb length (longer is easier) |
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The more _____ the knee the more stable
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posterior
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General energy requirements with more posterior knee
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- less energy to stabilize
- more energy to initiate knee flexion |
