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Prosthetics and Orthotics - Exam 1 > TT prosthesis components > Flashcards

TT prosthesis components Flashcards

1
Q

components of a TT prosthesis

A

interface

suspension

3S/Pin suspension

vacuum suction/expulsion valve

vacuum suction/elevate suction

suspension aids

foot/ankle assembly

articulated foot - ankle assembly

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2
Q

interface

A

liner/suspension

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3
Q

what is an interface

A

anything b/w the RL and the socket

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4
Q

interface fxn

A

distribute pressure

pad bony prominences

decrease friction

decrease shear force

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5
Q

which function of the interface is most important

A

decrease shear force

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6
Q

what could the interface be

A

liner or insert or could be part of suspension (part that holds the prosthesis on)

insert is not part of the suspension, could be for pressure distribution

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7
Q

liners or inserts

A

pelite/foam

silicon, gel, urethane characteristics

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8
Q

pelite/foam (liners or inserts)

A

not for suspension

insert or liner

inexpensive

compressible

does not reduce shear

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9
Q

silicon, gel, urethane characteristics

A

shock absorption

best at shear reduction

best at pressure distribution

often part of suspension

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10
Q

which liner/insert is the best of them all

A

silicon

closest to normal tissue

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11
Q

how is suspension rated

A

ability to prevent pistoning

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12
Q

what is pistoning

A

the distance the socket moves away from the RL when NWB

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13
Q

types of suspension

A

supracondylar cuff

thigh corset

rubber sleeve

suction suspension

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14
Q

supracondylar cuff –> design (suspension)

A

strap

suspends over femoral condyles

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15
Q

supracondylar cuff –> advantages (suspension)

A

small

no pressure on thigh

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16
Q

supracondylar cuff –> disadvantages (suspension)

A

fair suspension

not for obese patient

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17
Q

supracondylar cuff –> uses today (suspension)

A

sometimes auxillary strap

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18
Q

thigh corset –> design (suspension)

A

suspends around the thigh

orthotic knee joints w/ leather corset

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19
Q

thigh corset –> advantages (suspension)

A

larger area for suspension

used when can’t use condyles

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20
Q

thigh corset –> disadvantages (suspension)

A

heavy & bulky

poor cosmesis

encourages thigh atrophy

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21
Q

thigh corset –> uses today (suspension)

A

TKR

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22
Q

rubber sleeve suspension

A

replaced the thigh corset for most cases

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23
Q

rubber sleeve suspension –> design (suspension)

A

neoprene or elastic

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24
Q

rubber sleeve suspension –> advantages (suspension)

A

larger suspension area

inexpensive

easy to replace

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25
Q

rubber sleeve suspension –> disadvantages (suspension)

A

rolls down/shape of thigh

bulky

fair suspension/pistoning

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26
Q

3S/pin suspension

A

uses a PTB socket

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27
Q

3S/pin suspension –> design (suspension)

A

silicon sleeve

pin

shuttle lock

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28
Q

silicon sleeve –>3S/pin suspension –> design (suspension)

A

adheres to the skin on RL

secures leg to RL

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29
Q

pin –> 3S/pin suspension –> design (suspension)

A

attached to silicone sleeve

goes into shuttle lock

secures the sleeve to the prothesis

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30
Q

3S/ pin suspension –> advantages (suspension)

A

minimal pistoning

no additional straps or buckles

easier for patients with hand pathologies

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31
Q

3S/ pin suspension –> disadvantages (suspension)

A

some movement b/w sleeve and socket

stretching of the sleeve

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32
Q

vacuum suction/expulsion valve

A

used w/ TSB socket

33
Q

vacuum suction/expulsion valve –> design

A

negative pressure suction creates vacuum b/w the 2 sleeves

34
Q

vacuum suction/expulsion valve –> 2 sleeves

A

outer and inner sleeve

35
Q

outer sleeve –> vacuum suction/expulsion valve

A

connects to the prosthesis

36
Q

inner sleeve –>vacuum suction/expulsion valve

A

connects to leg

37
Q

vacuum w/ expulsion valve –> vacuum suction/expulsion valve

A

air pushed out

one way valve

38
Q

vacuum suspension/ elevated suction

A

harmony design system

harmony triton

39
Q

harmony design system –> vacuum suspension/ elevated suction

A

same as suction w/ expulsion, but expulsion valve except has pump to remove air

vacuum b/w the 2 sleeves

40
Q

harmony triton –> vacuum suspension/ elevated suction

A

pump built into the shank of the foot

41
Q

vacuum suspension/ elevated suction –> advantages

A

high mm of mercury vacuum –> greater than vacuum suction

excellent suspension

42
Q

disadvantages –> vacuum suspension/ elevated suction

A

pump built into the shank of the foot

43
Q

suspension aids

A

waist belt and fork strap

44
Q

waist belt and fork strap

A

last resort for suspension

used w/ another suspension system

45
Q

foot/ankle assembly –> fxn

A

BOS

motion

adaptation

propulsion

46
Q

foot/ankle assembly –> normal range

A

3 planes of motion

10 degrees DF

25 degrees PF

sup/pronation

rotation

47
Q

control –> foot/ankle assembly

A

greater the movement/greater control needed

48
Q

articulated foot - ankle assembly

A

single axis

multi-axis

49
Q

single axis –> articulated foot and ankle assembly

A

15 degrees PF

5 degrees DF

no ML movement

anterior/DF bumpers

posterior/PH bumpers

50
Q

multi-axis –> articulated foot ankle assembly

A

A/P

M/L

transverse motion

decrease torsion stress on RL/socket interference

51
Q

articulated dynamic single axis foot

A

elation

runway/freedom innovation

computer bionic

52
Q

elation –> articulated dynamic single axis foot

A

active k3 level

adjustable ankle

carbon fiber

sacrifice dynamic response

53
Q

what is the elation good for –> articulated dynamic single axis foot

A

transition from sneaker to high heels

54
Q

runway/freedom innovation –> articulated dynamic single axis foot

A

active k3 level

adjustable from a flat heel for sandals or walking

button to adjust ankle angle

55
Q

what is articulated dynamic single axis foot articulated w/

A

bumpers

56
Q

computer bionic –> articulated dynamic single axis foot

A

k3-k4

ossur proprio foot

BIOM

57
Q

occur proprio foot –> articulated dynamic single axis foot

A

heavy, expensive

many patients at k4 level will not use a computerized ankle

58
Q

BIOM –> articulated dynamic single axis foot

A

motor driven

must charge 4x a day

expensive

59
Q

what should we consider –> articulated dynamic single axis foot

A

weight

fxn

battery life

price

60
Q

articulated dynamic multi-axis

A

college park true step

61
Q

college park true step –> articulated dynamic multi-axis

A

k3-4

carbon fiber

bumpers

lots of moving parts

high dynamic response

62
Q

non-articulated non-dynamic

A

SACH foot

63
Q

SACH foot –> non-articulated non-dynamic

A

solid ankle cushioned heel

K1 foot

64
Q

SACH foot build –> non-articulated non-dynamic

A

wooden keel (heart)

cushioned heel stimulates HS and FF

toe break area

65
Q

toe break area –> SACH –> non-articulated non-dynamic

A

MT heads

PO area

jxn keel

cover

66
Q

SACH foot –> advantages –> non-articulated non-dynamic

A

no moving parts

movement thru cover

inexpensive

ML motion

67
Q

SACH foot –> disadvantages –> non-articulated non-dynamic

A

poor push off

poor gait

COG drop (energy costing)

ML motion

68
Q

non - articulate dynamic

A

flex foot - axis flex walk

ossur ceterus

renegade freedom innovation

ottobock harmony triton’s

flex sprint (cheetah)

69
Q

flex foot - axia/flexwalk –> non-articulated dynamic

A

K2 - K3

recommend for long residual limbs, low moderate activity level

lower profile

70
Q

ossur ceterus is now called –> non-articulated dynamic

A

pro flex XC torsion

K3-K4

71
Q

pro flex XC torsion –> non-articulated dynamic

A

carbon fiber

shock absorption

rotation device

sports (good for golfer)

72
Q

renegade freedom innovation –> non-articulated dynamic

A

K3-K4

replace reflex VSP

freedom innovation

vertical shock deflection

more popular than VSP

73
Q

ottobock harmony triton’s –> non-articulated dynamic

A

K3-K4

enhanced suction pump built in

3 carbon fiber springs

74
Q

what is a ottobock harmony triton used w/ –> non-articulated dynamic

A

harmony suspension/elevated suction

negative pressure elevated suction suspension

75
Q

where does the ottoback harmony triton absorb energy –> non-articulated dynamic

A

at HS

releases energy at PO

76
Q

flex sprint is also called –> non-articulated dynamic

A

cheetah

77
Q

cheetah –> non-articulated dynamic

A

carbon

no heel component

running foot

78
Q

your pt wants a new foot for sprinting, which foot is most appropriate

A

cheetah

79
Q

your pt tried a prosthetic foot that has an articulating ankle before and does not like them. however he likes the energy storing qualities of his previous foot. what foot would be the best choice for him?

A

flex foot

Prosthetics and Orthotics - Exam 1 (19 decks)

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