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
What system utilizes myoelectric control?
suction
26
What is hybird control?
combination of cable control and myoelectric control
27
Which is the most common electrical control method for a motor powered UE prosthesis?
myoelectric
28
Can terminal devices be custom?
yes there are many options to fit the needs of the patient
29
Explain Voluntary open TDs
force (of body) and excursion open hand spring or rubber band close hand grasp depends on strength of band
30
Explain voluntary close TDs
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
The primary difference between voluntary open and voluntary close are you have to protract the shoulder to close the device
false both use the same power generation just one opens with force and one closes with force depending on terminal device