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UEpx Flashcards

1
Q

6 common grip styles

A 
Cylindrical grasp
Tip (hook TD)
Hook/snap
Palmer (hand TD) (most common for picking up objects and hold use)
Spherical
Lateral (hook TD)
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2
Q

Advantages and disadvantages Hook TD

A 
Adv:
Light weight
Can see object
Mechanically simple
Versatile 
Easy to use
Disadvantage: 
Uncosmetic
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3
Q

Advantages vs Disadvantage hand TD

A 
Advantages:
Cosmetic 
Grasp some round objects
Disadvantages: 
Heavier
Difficult to open
More difficult to see objects 
Mechanically complex
Hard to put into pocket
Less versatile
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4
Q

Lyre shape

A

Straight approach
Top approach to object
Can’t see as well
Object is being pinched

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5
Q

What is the difference b/w a pair of outside locking hinges and a pair of flail arm hinges

A

Flail arm hinges utilizes a spring loaded joint on the lateral side

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6
Q

Polycentric hinges are used for?

A

Minimize bunching in the cubital fold- very short /short BE

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7
Q

What advantage is gained using variable ration step up hinges

A

Very short TR amputee are able to flex the px forearm a full 135 degrees

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8
Q

The above elbow control cable must always

A

Pass in front of the elbow center

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9
Q

The lever type excursion amplifier provides increased excursion at the expense of:

A

Force

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10
Q

Basic harness for shoulder amputation px is a:

A

Chest strap

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11
Q

Homer e-400 elbow unit allows the amputee to

A

Lock the elbow in 11 positions of flexion

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12
Q

The amount of glenohumeral flexion required to fully flex the elbow of a TH px should not exceed:

A

45 degree

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13
Q

Before fitting the class II, standard TH check socket, the rough proximal trim line should come:

A

Just over the acromium

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14
Q

To operate the locking mechanism of the Homer e-400 internal locking elbow adult size requires:

A

1/2-5/8” cable excursion and 2-3lbs of force

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15
Q

For class I TH amputee, the anterior and posterior trimline terminate where?

A

Just lateral to the deltopectoral groom and off the scapula

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16
Q

For class II TH amputee, what is the biomechanical reasoning for the position of the anterior and posterior timeline

A

To limit internal and external rotation of the glenohumeral joint

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17
Q

How does the prosthetist determine the humeral length of the prostheses for a bilateral TH amputee

A

Body height(in) x 0.19

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18
Q

What effect does the spring lift assist have on the force required to raise the forearm?

A

Helps to reduce force needed to begin initial flexion from a fully extended position of the forearm

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19
Q

For TH amputee what are the motions involved in operating the elbow lock?

A

GH extension, abduction and should depression

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20
Q

TH amputee cant fully pen the TD at mouth. Name 3 possible solutions for this problem

A

Tighten harness
Adjust cross point placement
Adjust housing length (TD HITTING DISTAL HOUSING)
Correct position of EFA
Correct control attachment strap placement (control strap not over distal 1/3 of scapula)
Move base plate and retainer distal and posterior
Add cross back strap
Fix loose fitting socket
Fix sharp bends or kinks in cable

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21
Q

TH TD is opening before reaching the mouth. Name two possible solutions for the problem:

A

Add more rubber bands to TD
Cable short
Fair leads split housing hitting on elbow flexion
More EFA more distal
Move base plate and retainer proximal and anterior
Lighter TD
Shorter forearm
Add elbow lift assist
Add second base plate and retainer to keep cable anterior to elbow joint

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22
Q

forearm is reflexes order to

A

Reach mouth

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23
Q

A mechanical partial hand px would be contraindicated for a transmetacarpal amputation with:

A

The thumb and index finger remaining

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24
Q

The initial socket brim for a short AE amputation would be trimmed on a line

A

1 to 2 inches above the acromion

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25
Q

For those amputee that incorporate a step-up hinge: IT requires more_____ to flex the forearm but you gain____

A

Force; range of motion

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26
Q

How many carpal bones are there in the human body

A

16

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27
Q

What does the nudge control enable the amputee do:

A

Lock and unlock the elbow by pressing a lever with the chin

28
Q

What is the purpose of fig. 8 BE harness

A

To suspend the px and to operate the TD

29
Q

What is greatly minimized for a shoulder disarticulation amputee

A

Sphere of work area activities

30
Q

In performing the checkout of the TR px the following force measurements where made: 6lbs. Pull at TD, and 10lbs pull at the control attachment strap. The housing is lined with teflon. The control system efficiency for this cable is

A

60%- below standard

31
Q

What is the major advantage of using the housing cross bar assembly?

A

Reduces control cable bending, increasing system efficiency

32
Q

What normal functions can be mechanically reproduced in a px arm:

A

Joint stabilization

33
Q

The major TR px control motion is glenohumeral:

A

Flexion

34
Q

The muenster design TR px presents a dilemma in that it

A

Offers excellent suspension but limits ROM

35
Q

What is considered the correct length for a BE px.? The curve of the hook shoulder correspond to the :

A

Sound side thumb tip

36
Q

Major supinator of the forearm is the:

A

Biceps

37
Q

Loss of the upper limb just distal to the supinator muscle will result in what amputation level:

A

Short BE RL

38
Q

What would be lost if a Bowden control cable were to be used instead of a fair lead control cable on a THpx

A

Elbow flexion

39
Q

Elbow flexion is obtained through the

A

Brachialis

40
Q

Rigid joints would be indicated for a patient who:

A

Had 50% forearm length

41
Q

What is the dual control cable system called?

A

Fair lead

42
Q

When does the trimline in a trans-radial px extend over the humeral epicondyles

A

When there is inadequate pronation and supination that can be captured in the socket

43
Q

The retainer is coated in the proximal 1/3 of the TR px becasue:

A

To allow rotation of the TD with out kinking the housing

44
Q

In the TR px, the cross bar is located mid-humerus (or up 1”) in order to

A

Fully open the TD with minimal glenohumeral humeral flexion

45
Q

When fabricating the TR control cable, the prosthetist measure the distal housing length with TD in:

A

Supination

46
Q

To fit the triceps cuff, prosthetist must take circumferential measurements where?

A

1” proximal to the cubital fold and around deltoid insertion

47
Q

The total normal range available in forearm rotation (sup and pro) is:

A

170 degrees

48
Q

To allow maximum rotation in the long BE and wrist disarticulation the prosthetist must provide what shape?

A

Screwdriver

49
Q

Self suspending transracial socket suspends in what manner?

A

M-L pressure, assisted by AP pressure

50
Q

Medium length TR there can be some residual pronation becasue:

A

Pronation teres is till largely intact

51
Q

The Northwestern supracondylar design for self suspending TR socket

A

Has trimline that sweeps distally on the anterior socket

52
Q

TR less than 50% forearm remaining indicates for:

A

Rigidhinges

53
Q

Oval wrist units preferred to round wrist unit

A

For WD px- permits the TD to pick up articles from a flat surface

54
Q

Retainer on a Class 1 TH amputee is placed where?

A

50% of anatomical humerus

55
Q

Retainer on a 50% length Cass II AE amputee is placed where?

A

1” proximal to the cut end of the bone

56
Q

In the coronal plane, a plumb line dropped through the acromium of the class II AE socket should fall through what landmark in a person with normal weight?

A

The medial boarder of the turntable

57
Q

What is a possible cause of external rotation of the AE px during humeral flexion

A

Humeral retainer too far lateral

Lateral suspension strap attached too far posterior

58
Q

Hosiery E-400 elbow unit allows the amputee to

A

Lock elbow in any 11 positions b/w 15-135 degree flexion

59
Q

In placing the outside locking elbow joint on an ED px the joint enter should be placed on the humeral epicondyles. T/f?

A

True

60
Q

Complete absence of the upper limb distal to the shoulder joint is termed

A

Amelia

61
Q

In normal movement, when the elbow is flexed to 90 the forearm can be rotated horizontally through an arc by activate internal and external humeral rotation. The size of the arc is?

A

110 degrees

62
Q

When considering children with phocomelic upper limbs, the common transverse deficiency is_____, and the common longitudinal deficiency is____.

A

Humeral, radial

63
Q

When a radial deficiency (partial or complete) is present, the hand typically presents with:

A

Radial deviation of the hand on the ulna

64
Q

Becasue of the loss of glenohumeral rotation in bilateral class II trans humeral amputation, the surgeon may perform a procedure to enhance the amputee’s ability to actively position the px in space on one or both sides:

A

Angulation osteotomy

65
Q

Approximately____incehs of excursion are required to operate a dual control system

A

4.5

66
Q

When operating a voluntary opening TD close to the body, the TR or Th amputee uses _____as the source of excursion and force:

A

Scapular abduction

67
Q

The syndrome resembling a lobster flow or bifurcation of the hand (sometimes into forearm) is called___

A

Ectrodactyly (central ray syndrome)

Px (15 decks)

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