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Prosthetics - Midterm > Transfemoral Socket Design > Flashcards

Transfemoral Socket Design Flashcards

1
Q

socket types

A

ischial containment

others

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2
Q

other socket types

A

MAS design

QIC hybrid

Sub ischial

I-FIT

Socketless socket

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3
Q

general principles

A

pressure

socket/material characteristics

quadrilateral socket

ischial containment socket

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4
Q

pressure –> sockets are

A

total contact

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5
Q

pressure –> sockets are not

A

distal end bearing

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6
Q

pressure –> there is sme

A

minimal pressure on distal end

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7
Q

socket/material characteristics –> could be

A

rigid vs flexible

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8
Q

socket/material characteristics –> will be

A

total contact

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9
Q

socket/material characteristics –> the flexible socket will be in a

A

rigid frame

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10
Q

socket/material characteristics –> what is more comfortable

A

flexible brim

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11
Q

socket/material characteristics –> has

A

ease of fabrication

new advances in materials

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12
Q

quadrilateral socket –> had been

A

standard for many years

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13
Q

quadrilateral socket –> % of what is fabricated today

A

very small

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14
Q

quadrilateral socket –> when might we see it

A

if individual has had limb loss for a long time

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15
Q

quadrilateral socket –> designed changed from

A

plug fit

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16
Q

quadrilateral socket –> originally developed

A

1950s

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17
Q

ischial containment socket –> is..

A

much of what is fabricated

18
Q

ischial containment socket –> types

A

CAT - CAM

CAD - CAM

19
Q

ischial containment socket –> CAT-CAM

A

contour adducted trochanteric controlled alignment method

20
Q

ischial containment socket –> CAD-CAM

A

computer aided design

21
Q

ischial containment socket design

A

basis for design

22
Q

insufficiencies w/ quad socket –> ischial containment socket design

A

iscial tubs

glutes

23
Q

insufficiencies w/ quad socket (ischial tubs) –> ischial containment socket design

A

ischial tub sits outside of socket on seat and is free to shift around in M/L and A/P planes

24
Q

insufficiencies w/ quad socket (glutes) –> ischial containment socket design

A

glute med contracts

proximal residual limb slides medially on ischial seat

distal femur = pressure

25
Q

problems w/ quad socket –> ischial containment socket design

A

shift of residual limb in socket

feeling that IT did not or could not WB

pressure in Scarpa’s triangle

shift of IT posterior

26
Q

problems w/ quad socket –> ischial containment socket design –> shift of residual limb in socket

A

results in lateral trunk leaning

to relieve medial and lateral socket pressures

get the COG over the base of support

27
Q

problems w/ quad socket –> ischial containment socket design –> feeling that IT did not or could not WB

A

for more weight sharing by soft tissues

28
Q

problems w/ quad socket –> ischial containment socket design –> pressure in scarpa’s triangle

A

may compromise circulation to residual limb

decrease blood to mm

29
Q

problems w/ quad socket –> ischial containment socket design –> shift of IT posteriorly

A

at HS

can decrease A/P stability

30
Q

ischial containment socket design –> shape

A

narrow M/L

opens up A/P

opposite of quad socket

31
Q

ischial containment socket design –> forces acting on RL

A

lateral directed force on ramus and IT

medially directed force on femur (proximal/distal femur)

32
Q

ischial containment socket design –> fxn of forces

A

3 pt pressure system

locks RL/pelvis in place

33
Q

advantages of ischial containment socket design

A

results of bony look increases efficiency of gait

flexible brim

34
Q

advantages –> results of bony lock (1)

A

maintenance of normal femoral adduction angulation

decrease tendency for socket to shift laterally at midstance

required counter force applied to femur to resist femoral abduction

35
Q

advantages –> results of bony lock (2)

A

by preventing femoral ABD –> we eliminate/lessen lateral trunk leaning

keeps ABD at fxnal length and with femur ADD, BOS is more normal and displacement of CG decreases

36
Q

advantages –> flexible brim

A

extra space in perineal space

increase circulation to RL

allows thigh to deform naturally during sitting

thigh can more easily change contour dynamically during gait

less proximal brim pain from rigid socket

37
Q

MAS

A

marlo anatomical socket

FDR center for prosthetics and orthotics

38
Q

characteristics of MAS

A

lower AP wall

more room for hip mm to operate

no WB on gluteal mm

more cosmetic appearance

39
Q

Quad-IC socket is used w/

A

vacuum or linear system

40
Q

QIC is the

A

most comfortable/versatile socket

41
Q

Osteointegration

A

direct structural and fxnal connection b/w living bone and the surface of a load-bearing artificial implant

42
Q

what do OI prosthesis represent

A

promising development in the rehab of individuals w/ TF amputation

increase QOL

Prosthetics - Midterm (8 decks)

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