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Prosthetics and Orthotics - Exam 1 > Principle of Trans-Tibial Socket Design > Flashcards

Principle of Trans-Tibial Socket Design Flashcards

1
Q

TT socket goals

A

support BW

stabilize body parts (A/P, M/L)

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2
Q

how many types of TT sockets

A

3 types

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3
Q

2 types of TT sockets

A

patellar tendon bearing socket (PTB)

total surface bearing

PTB hybrid

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4
Q

PTB purpose

A

to improve weight bearing on residuum

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5
Q

PTB socket contours

A

pressure sensitive

pressure tolerant

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6
Q

pressure sensitive (PTB)

A

relief

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7
Q

where does the pressure sensitive contour go (PTB)

A

crest of tibia

anterior distal tibia

fibular head

distal fibula

hamstring tendons

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8
Q

pressure sensitive tissue should be

A

areas that are protected or relieved

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9
Q

areas that are pressure or load sensitive

A

reliefs

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10
Q

pressure tolerant socket (PTB)

A

bulges

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11
Q

where does a pressure tolerant socket go (PTB)

A

medial flare of tibial condyles

medial/lateral tibial crest

fibular shaft

these areas weight share w/ distal end

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12
Q

pressure tolerant can be used to provide

A

areas of WBing to create pressure

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13
Q

what do we create in an area that is pressure or load tolerant

A

bulge

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14
Q

areas of weight bearing (PTB)

A

weight bearing shelf

counter pressure

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15
Q

weight bearing shelf (PTB)

A

patella tendon shelf

medial tibial flare

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16
Q

counter pressure (PTB)

A

pressure created opposite to weight bearing area

gastroc bulge on popliteal fossa (neurovascular area)

area that can be used to maintain the RL on area of WBing

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17
Q

socket design PTB

A

increase area for pressure distribution

prevents/accommodates edema

better proprioception

prosthetic position*

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18
Q

prosthetic position –> socket design –> PTB

A

5-10 degrees flexion

quads on stretch

19
Q

what kind of liner could you use with PTB

A

pelite

foam liner and cotton socks

20
Q

what do socket walls do –> PTB

A

stabilize muscles

acts as muscle attachment

21
Q

socket walls

A

anterior

posterior

lateral wall

medial wall

22
Q

anterior –> socket walls –> PTB

A

quads

WB

23
Q

anterior height –> socket walls –> PTB

A

mid patellar

24
Q

posterior –> socket walls –> PTB

A

hamstrings

counter pressure

25
Q

posterior height –> socket walls –> PTB

A

PT bar

26
Q

lateral wall –> socket walls –> PTB

A

M/L stabilization of pelvis during stance

27
Q

lateral wall height –> socket walls –> PTB

A

femoral epicondyle

28
Q

medial wall –> socket walls –> PTB

A

adductions

secondary weight bearing

29
Q

medial wall height –> socket walls –> PTB

A

femoral epicondyle

30
Q

how do you use total surface bearing (TBS)

A

conjunction w/ the silicone liner on entire RL

31
Q

hydrostatic principle –> TBS

A

mass of limb = volume of socket

RL in contact w/ socket thru gait

32
Q

socket design TBS

A

volume match, residual limb - socket 100% surface contact maintained

no true relief or bulges, total surface WB

lower trimlines, lighter

33
Q

TBS socket liner

A

silicone

gel

urethane liner

34
Q

a TBS socket is harder to

A

fabricate

35
Q

TBS sockets are best

A

without edema

36
Q

TBS socket…

A

decreases pain

no pressure in neurovascular area

37
Q

pt has had a TT amputation and was fitted w/ a prosthesis w/ a PTB socket. As a result of walking with this leg, ideally, the greatest redness should be where?

A

in area of the patella tendon

38
Q

original design –> HPTB

A

had PT bar 7 mm

39
Q

what is different about the hybrid PTB

A

smaller or just small indentation

reliefs and bugles smaller

40
Q

PTB v. TSB –> which is better to use w/ edema fluctuation

A

PTB

immature RL

41
Q

cheaper to make –> PTB v. TSB

A

PTB

42
Q

how many sockets are TSB

A

81%

43
Q

how many sockets are PTB

A

19%

44
Q

which socket has more interface and suspension choices

A

PTB

Prosthetics and Orthotics - Exam 1 (19 decks)

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