Upper Extremity Prosthetics Flashcards by Raelene Sepulveda

In the medium length trans-radial patient, residual pronation is a result of:
a. Pronator teres still largely intact
b. Biceps brachii is still intact
c. Brachioradialis is still mainly intact
d. Pronator quadratus is full intact

a. Pronator teres still largely intact

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An external movable sheave type excursion amplifier is used with what type of socket design?
a. VSBE
b. Muenster
c. AE
d. SD

d. SD

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Karl is an active farmer who wears his transradial prosthesis every day. Which of the following terminal devices would benefit him the
most?
a. Myoelectric hand
b. #7 LO Hook
c. #555 Hook
d. #10P Hook

b. #7 LO Hook

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The terminal device on a patient with a shoulder disarticulation amputation is operated primarily by
a. Elevation
b. Depressions
c. Adduction
d. Abduction

d. Abduction

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In patients with a trans-radial amputation, it is recommended to:
a. Retain as little pronation and supination as possible
b. Retain at least 50% of pronation and supination available
c. Always fit the patient with rigid elbow hinges to increase stability
d. Not worry about their supinaTon/pronaTon as it is not crucial to maintain

b. Retain at least 50% of pronation and supination available

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What level of amputation are flexible hinges indicated?
a. Short trans-humeral
b. Long trans-radial
c. Short trans-radial
d. Pediatric patient

b. Long trans-radial

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Which is not a characteristic of a cross back strap?
a. Increases available cable excursion
b. Decreases force required to operate the terminal device
c. Makes donning and doffing more difficult
d. Tends to keep the cross point from migrating

c. Makes donning and doffing more difficult

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What is the primary control motion to operate the shoulder disarticulation prosthesis?
a. humeral flexion
b. scapular abduction
c. shoulder depression
d. scapular adduction

b. scapular abduction

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What is greatest disadvantage to the amputee in using any step-up hinge?
a. Loss of flexion power in the forearm
b. The increased ratio angle between the socket and forearm during flexion
c. Added bulk in the finished product
d. Increase in complication during fabrication process

a. Loss of flexion power in the forearm

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The terminal device most desirable for a patient with a cineplasty is:
a. Voluntary opening terminal device
b. Myoelectric terminal device
c. Voluntary closing device
d. Passive terminal device

c. Voluntary closing device

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What is the main advantage of the wrist disarticulation, compared to a transradial length amputation?
a. patient maintains pronation and supination
b. increased options for wrist units
c. increased options for terminal devices
d. patient maintains prehension

a. patient maintains pronation and supination

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Which of the following wrist units is of least value to a patient with bilateral amputations?
a. Manual friction
b. Quickchange
c. Oval wrist
d. Flexion wrist

b. Quickchange

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What does the nudge control enable the amputee to do?
a. lock and unlock the elbow by pressing the lever with the chin
b. release the terminal device by pressing the lever with opposite hand
c. switch from dual control to triple control by pressing the lever with the
opposite hand
d. open and close the terminal device by pressing the lever with the chin

a. lock and unlock the elbow by pressing the lever with the chin

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In the case of a long TR amputation, which of the following hinge system is preferred?
a. Flexible
b. Single axis
c. Multiple action
d. Polycentric

a. Flexible

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The APRL terminal device is:
a. Voluntary Closing
b. Voluntary Opening
c. used for small children
d. cosmetically looks like a natural hand

a. Voluntary Closing

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Which of the following options can be mechanically replicated in an upper extremity prosthetic?
a. Joint stabilization
b. Tactile sensation
c. Shock absorption
d. Feed back

a. Joint stabilization

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An axial pull test on an upper extremity prosthesis should use a force of ____lbs, and not allow more than ____” of socket displacement.
a. 40; 1/2
b. 30;1
c. 50;1
d. 75; 1/2

c. 50;1

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Which part of the TH harness prevents glenohumeral external rotation?
a. Lateral Support Strap
b. Control Attachment Strap
c. Crossback Strap
d. Axillary Strap

a. Lateral Support Strap

The base plate and retainer:
a. permits distal movement of the control cable housing when the amputee flexes his forearm
b. holds the control cable to the prosthesis in a position for most efficient transmission of power
c. serves as a guide for the elbow lock control cable to hold it in alignment
d. enables the amputee to interchange hand and hook without disconnecting
the control cable

b. holds the control cable to the prosthesis in a position for most efficient transmission of power

The major limitation experienced by patients with a shoulder disarticulation is
a. Ability to return to previous activities
b. Excursion to operative the prosthesis
c. Availability of components
d. Force required to pick up an object

b. Excursion to operative the prosthesis

In the conventional wrist disarticulation prosthesis, suspension is provided by the:
a. fig 9 harness
b. invertedY
c. axilla loop
d. silicone liner

b. invertedY

Which of the following is not part of a trans-humeral Fig. of 8 harness?
a. Inverted “Y” strap
b. Lateral suspension strap c. Anterior suspension strap
d. Control attachment strap

a. Inverted “Y” strap

The constant friction wrist:
a. maintains the same friction throughout ROM
b. decreases amount of friction as the terminal device is pronated
c. only has a circle option (not oval)
d. is the best option for a small child’s passive hand prosthesis

a. maintains the same friction throughout ROM

A patient presenting with digital buds at the end of their residuum has which type of deficiency?
a. transverse deficiency
b. longitudinal deficiency
c. Amniotic Band Syndrome d. frontal deficiency

a. transverse deficiency

The patient has a transradial harness that is comfortable, but it is difficult to operate the terminal device without exaggerated movement. What adjustment could you make to improve this? a. The crosspoint of the Fig. 8 harness is too close to the sound side and should be moved away from the sound side and closer to the prosthetic side b. The crosspoint of the Fig. 8 harness is too close to the prosthetic side and should be moved away from the prosthetic side and closer to the sound side c. The crosspoint of the Fig. 8 harness is too proximal and should be moved more distally d. Switch out the terminal device for a stainless steel version

b. The crosspoint of the Fig. 8 harness is too close to the prosthetic side and should be moved away from the prosthetic side and closer to the sound side

The anterior support strap for the trans-humeral prosthesis should: a. Pass over the distal 1/3 of the scapula b. Pass over the proximal 1⁄4 of the scapula c. Pass over the deltopectoral groove d. Pass through the midpoint of the clavicle

c. Pass over the deltopectoral groove

Locking and unlocking the conventional elbow of a body powered TH prosthesis requires shoulder: a. Depression and extension b. Flexion c. Abduction and external rotation d. Adduction and depression

a. Depression and extension

Gerard has a left class III transhumeral amputation. He is seen in your office for an adjustment. He tells you that 'I just can't get comfortable with this new arm. It is not my prosthetic side that is bothering me, but there is so much pressure in my right armpit throughout the day.' Which of the following harness designs could most likely alleviate Gerard's discomfort? a. A Figure 9 harness with a padded axillary strap b. A Figure 8 harness with a crossback strap c. A chest strap harness with with a leather shoulder saddle d. A transhumeral design with suction suspension

c. A chest strap harness with with a leather shoulder saddle

When fitting a test socket for a VSBE the elbow should flex to: a. 135 degrees b. 110 degrees c. 90 degrees d. 45 degrees

c. 90 degrees

When fabricating a harness for a shoulder disarticulation prosthesis, the design is: a. Fig. of 8 harness b. Fig. of 9 harness c. Chest strap harness d. Deltopectoral harness

c. Chest strap harness

The 5XA terminal device is most appropriate for which sized person? a. Large adult b. Medium Adult c. Teen d. Child

a. Large adult

After the resident finishes setting up the transradial harness the patient reports increased pressure in his axilla and that it is difficult to operate the terminal device. Which of the adjustments need to be made? a. Adjust and recenter the Northwestern ring b. Add padding to the axillary strap since it can be uncomfortable in most patient populations c. Increase the number of rubber bands on the terminal device d. Add a lateral suspensor strap to decrease axillary pressure

a. Adjust and recenter the Northwestern ring

The trans-radial prosthesis is generally suspended by a. Suction suspension b. A shoulder girdle c. Supracondylar suspension d. An inverted “Y” strap

d. An inverted “Y” strap

The maximum pinch force of a two-load hook is a. 4 lbs b. 6 lbs c. 7 lbs

c. 7 lbs

When harnessing a patient with bilateral upper extremity amputations, the harness cross point should be a. Centered over the vertebral column b. Lower than for unilateral prosthetic use c. Proximal to C7 vertebra d. Towards the dominant arm

a. Centered over the vertebral column

A patient with a trans-humeral amputation is having difficulty flexing the elbow of his prosthesis. What course of action would be least useful to correct this problem? a. Adding a cross back strap to his current harness b. Increasing the prehension force on the TD c. Replace the steel TD with an aluminum TD d. Relocate forearm lift loop distally

b. Increasing the prehension force on the TD

Work terminal devices are usually made of: a. Stainless Steel b. Carbon fiber c. Aluminum d. Chemically treated plastic

a. Stainless Steel

How does a sliding pivot step-up hinge differ from a geared step-up hinge? a. Geared step-up hinge is used for short trans-humeral patients; Sliding pivot step up hinge is used with short trans-radial patients b. Sliding pivot step up hinge is used with short trans-radial patients; geared step-up hinge is used for long trans-radial patients c. The patient selection criteria is the same – they can both be used interchangeably on trans-radial patient populations d. Sliding pivot step-up hinge is used with long trans-radials; geared step-up hinge is used with short trans-radials

d. Sliding pivot step-up hinge is used with long trans-radials; geared step-up hinge is used with short trans-radials

What does the "X" stand for when determining terminal devices? a. Nitrile lined tip b. Canted Shaped c. Aluminum Material d. Plastisol lined

a. Nitrile lined tip

External rotation of the humerus is accomplished with the: a. Infraspinatus and Teres Major b. Supraspinatus and Teres Minor c. Infraspinatus and Teres Minor d. Subscapularis and Teres Major

c. Infraspinatus and Teres Minor

The triceps not only extends the elbow joint, but also a. Abducts the glenohumeral joint b. Extends the glenohumeral joint c. Flexes the glenohumeral joint d. Adducts the glenohumeral joint

b. Extends the glenohumeral joint

The deltoid provides: a. Humeral abduction, internal and external rotation b. Humeral adduction, extension and rotation c. Humeral adduction, flexion and internal rotation d. Humeral abduction, flexion and extension.

d. Humeral abduction, flexion and extension.

The rotator cuff is composed of which muscles? a. Subscapularis, infraspinatus, supraspinatus, teres major b. Deltoid, infraspinatus, teres minor, teres major c. Subscapularis, teres minor, rhomboid, latissimus dorsi d. Subscapularis, infraspinatus, supraspinatus, teres minor

d. Subscapularis, infraspinatus, supraspinatus, teres minor