TT Gait Deviations Flashcards

1
Q

What are prosthetic causes of excessive knee extension during IC->Mst?

A
  1. Socket aligned to far posterior or foot too far anterior
  2. Heel too soft
  3. Insufficient socket flexion
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2
Q

What are user causes of excessive knee extension during IC->Mst?

A
  1. Weak musculature around the knee

2. Locking knee in extension for stability because of fear

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3
Q

Excessive knee extension causes what type of moment at the knee?

A

Knee extensor moment

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4
Q

Where would you see skin break down with excessive knee extension?

A

Skin break down on anterior distal tibia from extending excessively in socket (bell clapping)

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5
Q

What are prosthetic causes of knee instability during IC->LR?

A
  1. Socket aligned too far anterior/foot aligned too far posterior
  2. Heel too firm
  3. Excessive foot DF
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6
Q

What are user causes of excessive knee extension during IC->LR?

A
  1. Weak quads

2. Knee flexion contracture

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7
Q

Where would you see skin break down/pressure with knee instability?

A

Unstable/pressure at posterior distal residual limb

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8
Q

Knee instability of TT gait will effect stance phase on prosthetic in what way?

A

Shortened during stance

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9
Q

Describe hip drop during Mst on prosthetic:

A

pelvic drop toward prosthetic side during Mst (best seen in frontal plane)

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10
Q

What are prosthetic causes of hip drop during Mst on prosthetic?

A

Prosthesis too short

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11
Q

What are user causes of hip drop during Mst on prosthetic?

A

Residual limb pain

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12
Q

What occurs with a narrow-based gait (lateral thrust)?

A

narrow BOS with lateral thrust of socket during Mst, excessive varus thrust at knee (frontal plane)

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13
Q

What are prosthetic causes of lateral thrust during Mst?

A

Foot too far inset

Laterally leaning pylon

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14
Q

What are user causes of lateral thrust during Mst?

A

Glute med weakness

Knee Ligament insufficiency

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15
Q

During lateral thrust during Mst where will you see increased pressure?

A

Proximal medial and distal lateral

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16
Q

What type of gait pattern might you see if there is lateral thrust during Mst?

A

uncompensated trendelenburg gait pattern.

17
Q

What are prosthetic causes of wide based gait during Mst?

A

Outset foot

Medial leaning pylon

18
Q

What are user causes of wide based gait during Mst?

A

Insufficient weight shift (swaying of trunk to ipsilateral side during stance phase bilaterally)
Hip abduction tightness
Patient fear

19
Q

During wide based gait during Mst where will you see increased pressure?

A

increased pressures proximolaterally at the limb/socket interface

20
Q

Describe drop-off/knee instability during TSt?

A

early and excessive knee flexion during TSt

21
Q

What are prosthetic causes of drop-off/knee instability during TSt?

A
  1. Socket aligned too far anterior/foot too far posterior

2. Inappropriate foot choice

22
Q

What are user causes of drop-off/knee instability during TSt?

A

Knee Flexion contracture (results in early and excessive knee flexion)

23
Q

How will drop-off/knee instability during TSt effect step length of intact limb?

A

Shortened step length with intact limb (skip IC and get foot flat contact)

24
Q

What is vaulting?

A

excessive PF of sound limb during MSt to clear prosthetic foot
(leads to fatigue in sound limb in calf)

25
Q

What are prosthetic causes of vaulting during Sw of prosthetic?

A
  1. Prosthesis too long
  2. Long toe lever arm
  3. Socket too far posterior
26
Q

What are user causes of vaulting during Sw of prosthetic?

A

Holding Knee in extension for too long

27
Q

What is pistoning?

A

loss of suspension
prosthesis begins to slip off the residuum during swing
(can be because limb size decreases in size as day goes on)

28
Q

What are prosthetic causes of pistoning during Swing phase, IC ->Mst?

A

Socket too large

Not enough socks

29
Q

What are user causes of pistoning during Swing phase, IC ->Mst?

A

Volume changes

Not enough socks

30
Q

Describe the change in step length with prosthesis with pistoning:

A

short step with prosthesis because they feel like limb will fall off

31
Q

T/F Prosthesis experiencing pisotning is a fall risk.

A

True

32
Q

Describe the uneven step length experienced during swing phase of TT prothesis:

A

taking a long step with the prosthetic limb, step-to pattern with sound limb
(shorter stance phase on prosthetic side)

33
Q

What are user causes of uneven step length?

A

Insufficient gait training

Decreased patient confidence

34
Q

Describe what circumduction of the prosthetic during swing phase?

A

patient swings leg around in an abducted position to advance it forward

35
Q

What are prosthetic causes of circumduction of prosthesis during swing phase?

A
  1. Poor suspension

2. Prosthesis too long

36
Q

What are user causes of circumduction of prosthesis during swing phase?

A
  1. Feeling of instability

2. Decreased knee flexion during swing