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Mvmt Disorders - Katherine > Transtibial Prosthesis > Flashcards

Transtibial Prosthesis Flashcards

1
Q

decreased heel lever, increased toe lever

A

stability

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2
Q

stabillity

A

GRF anterior to knee

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3
Q

GRF anterior to knee

A

promotes knee extension

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4
Q

adjustments to socket for stability

A 
socket extension, 
socket posterior to foot, 
foot PF, 
foot anterior to socket, 
softer heel cushion/PF bumper
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5
Q

what patients benefit from stability

A

patients with weak quads

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6
Q

increased heel lever, decreased toe lever

A

mobility

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7
Q

mobility

A

GRF posterior to knee

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8
Q

GRF posterior to knee

A

promotes knee flexion

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9
Q

adjustments to socket for mobility

A 
socket flexion,
socket anterior to foot,
foot DF
foot posterior to socket
firm heel cushion/ PF bumper
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10
Q

bench alignment

A

5 flexion
5 adduction
foot slightly medial

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11
Q

with greater heel lever/lesser toe lever, there is ______ IC and _________ early stance

A

abrupt, quick

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12
Q

with shorter heel lever, longer toe lever, there is __________ in toe off

A

delay

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13
Q

if PF bumper is soft….

A

heel lever will be functionally shorter = increase stability

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14
Q

if PF bumper is firm…..

A

it won’t allow for eccentric PF to occur at IC… resulting in quick early stance (increased mobility)

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15
Q

if DF bumper is firm (in late stance), patients will complain of:

A

feeling like they are walking up hill (stability because it won’t allow for excessive DF)

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16
Q

pressure tolerant areas

A

patellar ligament
gastroc belly (posterior compartment)
proximomedial aspect of leg (medial tibial flare/shaft)
anterolateral aspect of leg (lateral fibular shaft)

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17
Q

pressure sensitive areas

A 
heal of fibula
tibial crest
tibial condyles
distal ends of fibula/tibia
hamstring tendons
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18
Q

poor control of knee

A

socket tilted into extension or shifted posterior to foot - increase knee stability

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19
Q

strong and active patient

A

socket tilted into flexion or shifted anterior to foot - increase knee mobility

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20
Q

excessive medially (in frontal plane)

A

increase pressure on distal end of fibula

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21
Q

excessive laterally (in frontal plane)

A

increase pressure on fibular head

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22
Q

if heel is raised (but no contracture)

A

excessive weight anteriorly = jeopardizing knee stability

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23
Q

if forefoot raised

A

excessive weight posteriorly = difficult to flex the knee during walking

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24
Q

if lateral border is raised

A

excessive WB medially - pressure of fibular head

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25
Q

if medial border is raised

A

excessive WB laterally - distolateral pain

26
Q

if patient requires 0.5 inch lift under prosthesis, the following may be deficient:

A

socket too loose
heel on prosthetic too soft
shank too short

27
Q

if patient requires a 0.5 inch lift under sound leg, the following may be deficient:

A

socket too tight
heel too firm (excessive knee flexion)
shank too long

28
Q

anatomic causes of insufficient knee flexion in early stance

A 
anterodistal pain
poor balance
extensor synergy
knee extensor contracture
knee extensor weakness
29
Q

prosthetic causes of insufficient knee flexion in early stance

A 
heel too low
heel too soft
prosthetic foot in PF
socket in insufficient flexion
socket posterior relative to foot
30
Q

anatomic causes of excessive knee flexion in early stance

A

knee extensor weakness

knee flexor contracture

31
Q

prosthetic causes of excessive knee flexion in early stance

A 
heel too high
heel too firm
prosthetic foot in DF
socket in excessive flexion
socket anterior relative to foot
prosthesis too long
32
Q

anatomic/prosthetic causes of early knee flexion in late stance

A

same as excessive knee flexion in early stance except heel cushion/height irrelevant

33
Q

anatomic/prosthetic causes of delayed knee flexion in late stance

A

same as insufficient flexion in early stance; except heel cushion height irrelevant

34
Q

excessive lateral thrust

A

brim shifts laterally - GRF passes medial to the knee
excessive adduction of socket
excessive lateral displacement of socket (foot inset)

35
Q

excessive medial thrust

A

brim shifts medially - GRF passes laterally to knee
socket abduction
medial displacement of the socket - foot outset

36
Q

anterodistal pain causes:

A

insufficient knee flexion, delayed knee flexion

37
Q

poor balance causes:

A

insufficient knee flexion, delayed knee flexion; long prosthetic step

38
Q

extensor synergy causes:

A

insufficient knee flexion, delayed knee flexion

39
Q

hip flexor contracture causes:

A

long prosthetic step

40
Q

knee extensor contracture causes:

A

insufficient knee flexion, delayed knee flexion

41
Q

knee extensor weakness causes:

A

excessive knee flexion, early knee flexion or insufficient knee flexion (as a compensation for keeping GRF anteriorly)

42
Q

knee flexor contractures

A

excessive knee flexion, early knee flexion, long prosthetic step

43
Q

pain in amputation limb causes:

A

long prosthetic step (longer time WBing on sound limb)

44
Q

suspension inferring with knee flexion causes:

A

insufficient knee flexion, delayed knee flexion

45
Q

suspension causing knee flexion

A

excessive knee flexion, early knee flexion

46
Q

socket with insufficient flexion

A

insufficient knee flexion, delayed knee flexion

47
Q

socket with excessive flexion

A

excessive knee flexion, early knee flexion

48
Q

socket posterior to foot

A

insufficient knee flexion, delayed knee flexion

49
Q

socket anterior to foot

A

excessive knee flexion, early knee flexion

50
Q

socket in excessive adduction

A

excessive lateral thrust

51
Q

socket in abduction

A

medial thrust = pain at fibular head

52
Q

heel cushion too resilient

A

insufficient knee flexion,

53
Q

heel cushion too firm

A

excessive knee flexion,

54
Q

foot in PF

A

insufficient knee flexion, delayed knee flexion

55
Q

foot in DF

A

excessive knee flexion, early knee flexion

56
Q

foot excessively outset

A

medial thrust (same as excessive ABD)

57
Q

foot excessively inset

A

excessive lateral thrust (same as excessive ADD)

58
Q

shoe heel lower

A

iinsufficient knee flexion,

59
Q

shoe heel higher

A

excessive knee flexion

60
Q

prosthesis too long

A

excessive knee flexion; long prosthetic step

61
Q

prosthesis too short

A

insufficient knee flexion

Mvmt Disorders - Katherine (2 decks)

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