Interface & Suspension - TT Flashcards

1
Q

interface

A

anything b/w the RL and the socket

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2
Q

fxn of interface

A

distribute pressure

pad bony prominences

reduce friction

reduce shear force

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3
Q

what can an interface be

A

liner or insert

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4
Q

the interface is not part of

A

the suspension

pressure distribution

etc.

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5
Q

the interface can be part of

A

suspension

part of component that holds the prosthesis on

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6
Q

the ability to fulfill its fxn depends on –> interface

A

the material of the interface

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7
Q

if an interface is a liner or insert

A

primarily to pad or protect the RL

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8
Q

materials of interface

A

pelite foam

silicon

gell

urethane

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9
Q

pelite foam characteristics –>interface

A

not for suspension

insert of liner

inexpensive

compressible

does not reduce shear

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10
Q

what is pelite foam used w/ –>interface

A

cuff suspension

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11
Q

urethane is –>interface

A

all 3 materials

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12
Q

characteristics of urethane –>interface

A

sock absorption

shear reduction

pressure distribution

can be for suspension

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13
Q

what is the closest to normal physiologically –>interface

A

silicon

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14
Q

urethane, gel and silicone can act as –>interface

A

suspensions and interfaces

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15
Q

suspension

A

the component that holds the prosthesis on

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16
Q

pistoning

A

distance prosthesis moves off the RL in NWB

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17
Q

what does the amount of pistoning determine

A

the quality of the suspension

less pistoning = better the suspension

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18
Q

types of suspension

A

suction suspension

supracondylar cuff

thigh corset

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19
Q

silicon suspension

A

pin suspension/silicon sleeve

vacuum suspension/negative pressure

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20
Q

pin suspension/silicon sleeve is

A

3S (silicon sleeve suspension)

shuttle lock

strap/lanyard

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21
Q

vacuum suspension/negative pressure

A

w/ expulsion valve

w/ elevated suction

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22
Q

3S suspension design

A

silicon sleeve

pin

shuttle lock

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23
Q

silicon sleeve –> 3S

A

sleeve adheres to the skin on the RL

secures sleeve to RL

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24
Q

pin –> 3S

A

attached to silicon sleeve

goes into shuttle lock

secures the sleeve to the prosthesis

25
Q

3S suspension is used w/

A

PTB socket

26
Q

advantages of 3S

A

minimal pistoning

excellent suspension

27
Q

disadvantages of 3S

A

some movement

difficulty getting pin into shuttle lock

28
Q

some movement –> disadvantages of 3S

A

b/w sleeve and socket

stretching of the sleeve

29
Q

what can we use if needed during athletic activities –> 3S

A

auxiliary strap

30
Q

3S w/ strap (lanyard) system

A

has silicon sleeve like pin/shuttle lock system

silicon sleeve attaches to pt skin

has strap attached to sleeve

has strap attached from sleeve to prosthesis

31
Q

negative pressure suspension

A

vacuum suspension

32
Q

vacuum suction w/ expulsion valve has

A

2 sleeves

33
Q

2 sleeves –> vacuum suction w/ expulsion valve

A

inner sleeve

outer sleeve

34
Q

inner sleeve –> vacuum suction w/ expulsion valve

A

connects to leg

35
Q

outer sleeve –> vacuum suction w/ expulsion valve

A

connects to prosthesis

36
Q

vacuum suction w/ expulsion valve

A

air pushed out

not in one way valve

creates vacuum b/w the 2 sleeves

37
Q

what is vacuum suction w/ expulsion valve used w/

A

TSB socket

38
Q

suction w/ expulsion valve w/ liner that has built in seals

A

gel, silicon or urethane liner

inner liner and outer liner

39
Q

suction w/ expulsion valve w/ liner that has built in seals characteristics

A

one way expulsion valve

negative pressure

creates vacuum b/w inner and outer

40
Q

what does the inner liner have built in –> suction w/ expulsion valve w/ liner that has built in seals

A

seals

41
Q

vacuum suspension/elevated suspension

A

harmony system (1 brand)

42
Q

design is the same as –> vacuum suspension/elevated suspension

A

suction w/ expulsion valve except…

43
Q

same, except –> vacuum suspension/elevated suspension

A

has pump to remove air

sometimes pump is part of the foot

44
Q

vacuum suspension/elevated suspension has

A

2 sleeves

vacuum b/w the sleeves

45
Q

advantages –> vacuum suspension/elevated suspension

A

high mm of mercury

excellent suspension

little to no pistoning

46
Q

disadvantages –> vacuum suspension/elevated suspension

A

sometimes negative pressure on limb not well tolerated

number of socks bulky, esp in sitting

47
Q

harmony triton

A

pump built into the shank of the foot

48
Q

suspensions/axillary suspension

A

supracondylar cuff

49
Q

design –> supracondylar cuff

A

straps

suspends over femoral condyles

50
Q

advantages –> supracondylar cuff

A

small

no pressure on thigh

51
Q

disadvantages –> supracondylar cuff

A

fair/poor suspension

moderate amount of pistoning

not for obese pt

52
Q

uses today –> supracondylar cuff

A

sometimes used as auxiliary strap for other suspensions

53
Q

thigh corset

A

leather corset w/ orthotic knee joints

54
Q

where does the thigh corset suspend

A

around the thigh

55
Q

thigh corset has a

A

large area for suspension

56
Q

disadvantages of thigh corset

A

heavy, bulky, poor cosmesis

moderate amount of pistoning

results in thigh atrophy

57
Q

uses today –> thigh corset

A

total knee replacement

58
Q

which suspensions are the most common

A

pin or 3S

59
Q

least common suspension

A

number cuff