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23 Cards in this Set
- Front
- Back
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What is the cause of external rotation of foot at IC?
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Heel is too firm causing it to ER.
Socket shape not appropriate especially in popliteal area. |
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What happens with excessive heel compression?
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Lowers the COG and delays rollover/delays ff to floor
Increased muscle activity of quads and hf |
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What causes foot slap?
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insufficient pf resistence in articulated ankle of Px foot
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What is the cause fo foot slap?
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Soft pf bumper
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What is the standard amount of flexion in a TT socket?
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5-7 degrees
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If Pt's knee is unstable in TT socket, what should you do?
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decrease df or decrease flexion of socket
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Pt walks on the lateral side of the foot. What position is the socket in?
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socket in excessive ABD
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Pt walks on medial side of foot. What positon is the socket in?
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Socket in excessive ADD
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Excessive valgus moment will occur if?
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insufficient medial placement of the foot, poor integrity of the MCL, or inversion of the foot
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excessive varus moment will occur if?
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M/L dimension of socket too big, toe out too much, or foot too inset
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What is delayed progression?
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Hesitation in forward progression of the tibia
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What causes delayed progression?
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Heel too low in the shoe, forefoot lever too long or rigid, insuff df of foot
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What can cause hyperextension of the knee?
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Heel cushion too soft, keel to firm/long, laxiety of posterior capsule
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What design is preferred if pt knee is hyperextending?
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Supra patellar supra condular PTB
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How will drop off present on a Px pt?
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Weight bearing is premature and shortened on Px side
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What causes drop off?
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Keel too soft/short.
Heel height too high for the Px foot. |
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What causes excessive toe out?
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ER at the hip
Px foot too ER relative to line of progression |
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How does pistoning of socket present?
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Tibia moves vertically
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What causes pistoning?
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Socket too large
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what causes asymetrical shoulder movement?
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LLD
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a TT Pt exhibits excessive varus thrust @ midstance (ie Malaki)
1-Name the 4 possible causes 2-Name 3 solutions |
1-foot too inset
ML of socket too large socket too ABD 2-ADD foot decrease inset of foot pad medially LCL laxity |
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list 3 reasons why varus moment is desirable at MS
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mimics NHL and decreases energy expenditure
established narrow BOS loads pressure tolerate areas medial proximal, lateral distal |
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3 advantages to total contact fitting
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minimizes distal edema
increases surface area for load bearing increases proprioception |
