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Upper Extremity Prosthetics > Week 8 > Flashcards

Week 8 Flashcards

1
Q

For an elbow disarticulation what should you determine to figure out the socket style?

A

ML difference and if it is greater than 1/4

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2
Q

What are the ED suspension options?

A 
Spiral channel
flexible liner
custom gel liner
expandable silicone wall
window/door
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3
Q

What are the advantages of the ED spiral channel?

A

no extra bulk

similar shape to arm

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4
Q

What are the disadvantages of the ED spiral channel?

A

more difficult to modify correctly

difficult to adjust

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5
Q

What are the material for a ED flexible liner?

A

pelite
Ucolite
multi-density

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6
Q

What are the advantages of the ED suspension flexible liner?

A

ease of donning
simple design
ease of adjust for fit changes

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7
Q

What are the disadvantages of the ED flexible liner?

A

stove pipe shape

increased bulk

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8
Q

What are some aspects of the ED silicone liner/

A

it fills the difference in size
don like flexible liner
can use hardware-lanyard suspension, pin lock
can be suction suspension

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9
Q

What are the advantages of the Ed custom silicone liner/

A

comfort
versatile options
positive suspension

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10
Q

What are the disadvantages of the ED custom silicone liner?

A

complication in fabricating
time to fabricate
central fabrication time

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11
Q

What are some aspects of the Ed expandable silicone wall/

A

inner wall
create cavity over silicone wall
push through the flexible silicone

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12
Q

What are the advantages of the ED expandable silicone wall/

A

ease of donning

less bulk than the liner versions

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13
Q

What are the disadvantages of the ED expandable silicone wall?

A

difficult to fabricate
no adjustability
difficult to clean
stove pipe

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14
Q

What are the advantages of the ED window/door?

A

ease of donning

simple

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15
Q

What are the disadvantages of the ED window/door?

A

cosmetics
straps bulk
bilaterals

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16
Q

What are the modifactions for a transhumeral class 1 ED?

A

smooth cast
check circumference measurements
bring bold to measured ML at axilla
bring distal AP to measurements
make certain medial axilla wall is flat-pectoralis/latissimus dorsi tendons defined
relieve bony prominences-dit lat/ant humerus

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17
Q

What are the modifications for class II and III?

A 
smooth cast
check circumferences
check proximal AP
check length
make medial axilla wall flat- define pectorlais and latissimus dorsi
relieve distal an/lat humerus
18
Q

Where should you flatten the posterior wall for transhumeral class II and III modifications?

A

distal to spine of scapula

parallel to spine and body of scapula

19
Q

Where should the anterior wall contour to for class II and III modifications?

A

delto-pectoral groove, but not digging into head of humerus or coracoid process

20
Q

When should the Axilla ML be the same as the measurements?

A

traditional
UDS
AP clasp design

21
Q

When should the Axilla ML not be the same as the measurements?

A

HIFI

fleshy residuum

22
Q

How much should the circumferences be reduced proximally?

A

2-4%

23
Q

What two widths should be the same?

A

compression zones and relief zones

24
Q

What are the modifications for a shoulder disarticulation/forequarter?

A

smooth cast
ensure AP measurment
Don’t bring trimlines too medially- may limit ab/adduction, pro/retraction

25
Q

What are the body powered elbow joints?

A 
external friction (w/o rotation unit)
internal friction (w/ rotaion)
outside manual locking
internal manual locking
internal electronic locking
ERGO arm Otto Bock
26
Q

What are some aspects of the external friction elbow joint?

A

positioning in elbow flex/ext

for someone who can’t learn lock/unlock action

27
Q

What are the disadvantages of the external friction elbow joint?

A

won’t hold position for heavy objects

adds ML bulk

28
Q

What are aspects of the internal friction elbow joint?

A

adjustable constant friction flex/ext, IR/ER

for someone who can’t learn lock/unlock action

29
Q

What are the disadvantages of the internal friction elbow joint>

A

won’t hold position for heavy objects

less bulky than external joints

30
Q

What are some aspects of the external locking elbow joint?

A

locking joint on medial side
following joint lateral
hosmer: small, medium, and large- 7 lock positions; heavy duty- 5 lock positions
positive lock
alternating one pull lock, one pull unlock.

31
Q

What’s an advantage of the external locking elbow joint?

A

forearm lift assist on lateral side

32
Q

What are the disadvantages of the external locking elbow joint/

A 
bulky
complicated small parts easily lost
difficult for children under 5
decreased power and excursion
friction
33
Q

What are the advantages of the Otto Bock external locking elbow joint/

A

less bulky than hosmer

less complicated joint mechanism

34
Q

What is the disadvantage of the Otto Bock external locking elbow joint?

A

can’t use the Hosmer lift assist on lateral

35
Q

What is the number for a small internal locking elbow joint and number of locking positions?

A

E-50

10 positions

36
Q

What is the number for medium internal locking elbow joint and number of locking positions?

A

E-200

11 locking positions

37
Q

What is the number for large internal locking elbow joint and number of locking positions/

A

E-400

11 positions

38
Q

What is the number for large heavy duty internal locking elbow joint and number of locking positions?

A

E-400

8 locking positions

39
Q

When should a internal locking elbow joint be used/

A

for class II and III

40
Q

What are some advantages of the internal locking elbow joint?

A

can be retro-fitted with positive locking rotation

can use hosmer lift assist on lateral

41
Q

What are the advantages of the forearm lift assist?

A

counter balance the weight of the TD and other objects
allows you to adjust the cabling to increase ROM
adjustable tension

Upper Extremity Prosthetics (14 decks)

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