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Movement Science 2 > Week 11 Upper Extremity Prostheses > Flashcards

Week 11 Upper Extremity Prostheses Flashcards

1
Q

Terminal Device

A

hand functioning device

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2
Q

Suspension

A

how the prosthesis is attached to the body

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3
Q

Excursion

A

How much ROM is needed

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4
Q

What is the most common reason for UE ampuation?

A

trauma

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5
Q

What are the types of UE prosthesis?

A
  1. shoulder disarticulation
  2. transhumeral
  3. Transradial
    4.Trans metacarpal
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6
Q

What are the types of UE suspensions

A
  1. Harness
  2. Pin-lock Liner
  3. Suction
  4. Anatomical/self suspending
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7
Q

What are the advantages/disadvantages to the Harness suspension?

A

Advantages: simple, easy to manage
durable, accomodate heavy duty application, easy don and doff

Disadvantage: can be uncomfortable, poor cosmesis

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8
Q

Which UE amputation level makes harness the only option?

A

shoulder disarticulation

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9
Q

What are the advantages/disadvantages to the Pin-lock Liner Suspension?

A

Advantages: comfortable, cushion bony prominences, reduce shear forces
Disadvantage: somewhat difficult to don doff
*harness usually still needed-for power generation

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10
Q

Pin lock liner is ideal for what type of prosthesis?

A

passive
mid to short length TH or TR
may not be able to carry things

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11
Q

What are the advantages/disadvantages to Suction Suspension?

A

Advantages: interface with myoelectric control
Reduce or eliminate harness

Disadvantage: difficult to don doff
Very sensitive to volume fluctuations of UE

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12
Q

Suction Suspension utilizes what type of power control?

A

Myoelectric

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13
Q

What are the advantages/disadvantages to anatomical suspension/self suspending

A

Advantages: integrates with myoelectric control
reduces or eliminates harnessing

Disadvantages: difficult to don doff
Reduces range of motion

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14
Q

What is the other type of suspension system most common to see in addition to the pin-lock liner?

A

harness

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15
Q

The individual generates the force necessary to cause movement

A

Body powered prosthesis

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16
Q

What is force and excursion in relation to a prosthesis?

A

force- strength of causing motion strength pulling cable
excursion- how wide the terminal device opens from the force

17
Q

What movement generate force and excursion for a shoulder disarticulation?

A
  1. biscapular abduction
  2. scapular elevation
  3. Chest expansion
18
Q

What movements generate force excursion for a transhumeral/elbow disarticulation?

A
  1. GH flexion- ipsilateral
  2. biscapular abduction
  3. scapular depression/extension/abduction- ipsilateral
19
Q

What movements generate force excursion for a transradial?

A
  1. GH flexion- ispilateral
  2. biscapular abduction
20
Q

What is a Passive prosthesis best known for?

A

Primarily cosmetic
but it does function with a locking elbow could have rotating wrist, passive spring terminal device

21
Q

An on-board motor provides force for motion- user selected to function independently as determined by control strategy

A

externally powered prosthesis

22
Q

What two basic motions open a terminal device for a body powered transradial ampuation?

A

GH flexion- ipsilateral
Scapular abduction- bilateral

23
Q

Cable control can be utilized with two power generations what are those?

A
  1. body power- harness capture excursion
  2. External power- connects to transducer or switch
24
Q

Electrodes imbedded in the socket wall for contact with skin– collect electrical activity of a muscle contraction and convert it to a signal

A

myoelectric control

25
Q

What system utilizes myoelectric control?

A

suction

26
Q

What is hybird control?

A

combination of cable control and myoelectric control

27
Q

Which is the most common electrical control method for a motor powered UE prosthesis?

A

myoelectric

28
Q

Can terminal devices be custom?

A

yes there are many options to fit the needs of the patient

29
Q

Explain Voluntary open TDs

A

force (of body) and excursion open hand spring or rubber band close hand
grasp depends on strength of band

30
Q

Explain voluntary close TDs

A

force and excursion close the hand
rubber band opens
mimics the way a hand works you activate muscles to grip objects
however less common

31
Q

The primary difference between voluntary open and voluntary close are you have to protract the shoulder to close the device

A

false
both use the same power generation just one opens with force and one closes with force depending on terminal device

Movement Science 2 (10 decks)

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