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Prosthetics > Exam 2: Transfemoral Amputation > Flashcards

Exam 2: Transfemoral Amputation Flashcards

1
Q

Recent amputees with fluctuating edema or unstable weight should have a pull-in suction suspension (true/false)

A

false

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2
Q

Lanyard suspension is more common in transfemoral than transtibial (true/false)

A

true

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3
Q

Which type of suspension is the best to use in a new amputee with fluctuating limb volume?

a. pull-in suction
b. total elastic belt
c. Silesian belt
d. pelvic belt and hip joint

A

total elastic belt

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4
Q

Which type of socket design tries to control an abducted residual femur and keeps it from rotating around the limb?

a. quadrilateral
b. marlo anatomical
c. subischial
d. ischial containment

A

ischial containment

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5
Q

Which type of socket design encapsulates the ischial tuberosity and comes in medially in the socket?

a. ischial containment
b. quadrilateral
c. marlo anatomical
d. subischial

A

marlo anatomical

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6
Q

Which type of socket design has a trim line considerably below the ischium, provides increased patient comfort and increased patient ROM?

a. subischial
b. marlo anatomical
c. ischial containment
d. quadrilateral

A

subischial

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7
Q

How many inches is the proximal trim line lowered in a subischial socket design?

a. 1-2 inches
b. 2-3 inches
c. 3-4 inches
d. 2-4 inches

A

2-4 inches

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8
Q

What type of socket material is resin-laminated or thermoformed plastic and is intended to have an intimate, total contact fit?

a. rigid
b. flexible

A

rigid

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9
Q

This type of socket material is durable, easy to clean, less bulky, less expensive but is difficult to adjust

a. flexible
b. rigid
c. soft
d. gel

A

rigid

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10
Q

What type of socket material is vacuum formed with any number of flexible thermoplastic materials?

a. rigid
b. flexible
c. gel
d. soft

A

flexible

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11
Q

The rigid socket material is incased in a rigid frame and provides support with WB and helps keep the sockets shape (true/false)

A

false

this is describing a flexible socket material

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12
Q

Which type of socket design is more comfortable during sitting, less durable, more bulky to wear and more expensive?

a. flexible
b. rigid

A

flexible

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13
Q

What type of suspension is most commonly used with a pull sock or sleeve, requires agility and balance, has an air expulsion valve and provides an intimate fit?

a. elevated vacuum
b. Silesian belt
c. shuttle lock
d. pull-in suction

A

pull-in suction

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14
Q

Patients report enhanced prosthetic control and better proprioceptive sense with this type of suspension

a. lanyard
b. shuttle-lock
c. pull-in suction
d. elevated vacuum

A

pull in suction

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15
Q

This type of liner has a rubber ring that makes close contact with the socket and expenses air through the valve and then creates the suction

a. lanyard
b. pull-in suction
c. cushion with air expulsion valve
d. elevated vacuum

A

cushion with air expulsion valve

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16
Q

The shuttle lock is a _ and _ system

A

pin and lock

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17
Q

Roll-on suspension liners are like _ liners

A

gel

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18
Q

What type of suspension uses a strap or cord to help pull the limb into the socket?

a. lanyard
b. shuttle-lock
c. cushion with air expulsion valve
d. total elastic belt

A

lanyard

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19
Q

Which type of socket creates a negative pressure environment all the time?

a. shuttle-lock
b. cushion with air expulsion valve
c. pull-in suction
d. elevated vacuum

A

elevated vacuum

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20
Q

This type of socket design is a leather or lightweight webbing for a belt

a. total elastic belt
b. pelvic belt and hip joint
c. Silesian belt

A

Silesian belt

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21
Q

The Silesian belt attaches to the (medial/lateral) aspect of socket, enircles the (pelvis/hip) and then attaches to the loop or buckle on the (anterior/posterior) of the prosthesis

A

lateral
pelvis
anterior

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22
Q

This type of belt has an elastic neoprene material and appears more comfortable than other belt systems

a. pelvic belt and hip joint
b. total elastic belt
c. Silesian belt

A

total elastic belt

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23
Q

This type of belt has a metal hip joint and is usually used for short residual limbs

a. total elastic belt
b. pelvic belt and hip joint
c. Silesian belt

A

pelvic belt and hip joint

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24
Q

Which type of belt helps limit rotation and increases M-L stability?

a. total elastic belt
b. Silesian belt
c. pelvic belt and hip joint

A

pelvic belt and hip joint

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25
Q

What type of liner will help fit a bulbous distal end of a residual limb?

a. soft liner
b. gel liner

A

gel liner

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26
Q

Which prosthetic knee has a simple hinge and allows the prosthetic shin to swing freely in flexion and extension?

a. hydraulic knees
b. pneumatic knees
c. single-axis
d. polycentric

A

single-axis

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27
Q

How is stance phase stability achieved with a single-axis limb?

a. through musculature of the limb
b. through the hinge
c. by alignment and muscle control

A

alignment and muscle control

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28
Q

Which type of prosthetic knee unit is lightweight, durable, low maintenance but has no mechanical stability?

a. polycentric knees
b. weight-activated control
c. manual locking knee
d. single-axis

A

single axis knee

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29
Q

A single-axis knee is good to use with short residual limbs (true/false)

A

false

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30
Q

Which type of knee moves the center of rotation to more closely mimic the human knee?

a. weight-activated control
b. hydraulic knee
c. pneumatic knee
d. polycentric knee

A

polycentric knee

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31
Q

The center of rotation for this knee promotes knee stability during stance

a. single-axis knee
b. polycentric knee
c. hydraulic knees
d. microprocessor knee

A

polycentric knee

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32
Q

A polycentric knee is good for long residual limbs or disarticulation (true/false)

A

true

33
Q

What is the disadvantage of a polycentric knee?

A

multiple mechanical joints and durability

34
Q

A stance control knee has a locking mechanism that is activated when weight is placed through the knee during stance

a. manual locking knees
b. weight-activated control
c. hydraulic knees
d. polycentric knees

A

weight-activated

35
Q

Which type of knee will prevent buckling if the knee is not straight at IC?

a. single-axis knee
b. hydraulic knee
c. weight-activated
d. pneumatic knee

A

weight-activated

36
Q

Your patient is a recent amputee with a short residual limb and has hip extensor weakness, which type of knee would be appropriate?

a. polycentric knee
b. single-axis knee
c. hydraulic knee
d. weight-activated control

A

weight-activated control

37
Q

This knee is a single axis with a locking pin, locks automatically when the knee is fully extended and unlock when the knee is unloaded, it provides max stance stability

a. manual locking knee
b. single-axis knee
c. polycentric knee
d. pneumatic knee

A

manual locking knee

38
Q

What does a manual locking knee compromise?

a. stance stability
b. step length
c. mobility and toe clearance

A

mobility and toe clearance

39
Q

Hydraulic knees use _ through channels for _

A

fluid, resistance

40
Q

Which type of knee would be the best to give a K3 type user?

a. pneumatic knee
b. hydraulic knee
c. microprocessor knee
d. none of the above

A

hydraulic knee

41
Q

A hydraulic knee provides resistance to improve

a. stance control
b. stability
c. friction
d. shear forces

A

stance control

42
Q

Hydraulic knees have (high/low) maintenance and (high/low) costs

A

high maintenance

high cost

43
Q

A Pneumatic knee uses _ _ dynamics like hydraulics

A

air pressure

44
Q

Pneumatic knees provide less precision with cadence control than hydraulics (true/false)

A

true

45
Q

What type of prosthetic knee has sensory that monitor knee position during swing and pressure sensors evaluating ground reaction forces during stance?

a. next-generation knees
b. microprocessor knees
c. all of the above

A

microprocessor knees

46
Q

Which type of knee provides a more natural gait down ramps and steps?

a. next-generation knees
b. hydraulic knees
c. microprocessor knees
d. none of the above

A

microprocessor

47
Q

A microprocessor will decrease

a. step length
b. stance phase stability
c. energy expenditure
d. swing phase

A

energy expenditure

48
Q

Which type of knee actively lifts and stimulates the users own muscles for ascending stairs, inclines and ramps?

a. next-generation knees
b. microprocessors
c. hydraulic knee

A

next-generation knee

49
Q

Which type of knee allows users to walk with greater efficiency upstairs, backwards and over obstacles?

a. microprocessor
b. next-generation knees
c. weight-activated
d. polycentric

A

next-generation knee

50
Q

What type of additional component can help swing the leg if they have weak hip flexors?

a. torque aids
b. transverse rotation units
c. extension aids

A

extension aids

51
Q

type of aid

_ _ get tight as the knee flexes and pulls the knee forward as it is coming through

A

extension aids

52
Q

Which type of aid allows uses to rotate and bend their knee up?

a. torque aids
b. transverse rotation units
c. extension aids

A

transverse rotation units

53
Q

What is the main consideration when choosing a prosthetic foot?

a. the response up the chain
b. energy expenditure
c. influence on knee stability during stance
d. the musculature available

A

influence on knee stability during stance

54
Q

Your patient is active and wants to walk at faster speeds, which type of prosthetic foot would you recommend?

a. single axis
b. multi axis
c. dynamic response
d. SACH

A

dynamic response

55
Q

Bench alignment ensures _ stability

A

knee

56
Q

Static alignment looks at the patient

a. walking
b. standing
c. sitting
d. none of the above

A

standing

57
Q

Which should you check when looking at the height of the prosthesis?

a. knee alignment
b. iliac crests
c. level of the pelvis
d. ankle alignment

A

iliac crests

58
Q

How many inches should be between the heels looking at the BOS?

a. 1 inch
b. 1-2 inches
c. 3-4 inches
d. 2-3 inches

A

2-3 inches

59
Q

Lateral alignment looks at what 4 key areas?

A

knee stability in stance
transition from IC to foot flat
symmetry of step length and step duration
quality of knee flexion during last stance and swing phase

60
Q

What is looked at the most with lateral alignment?

a. knee stability
b. knee flexion
c. step duration
d. step length

A

step length

61
Q

Anterior alignment looks at what 4 key areas?

A

suspension
width of BOS
control of pelvis during stance
quality and pattern of swing

62
Q

Which type of suspension does not control rotation of the limb?

a. total elastic belt
b. pelvic belt and hip joint
c. Silesian belt
d. elevated vacuum

A

Silesian belt

63
Q

Which socket design keeps from rotating around the limb?

a. quadrilateral
b. CAT-CAM
c. ischial-ramal containment
d. Marlo Anatomical

A

CAT-CAM

64
Q

Which socket is more comfortable for wearers and has greater hip mobility and stability?

a. quadrilateral socket
b. Marlo Anatomical socket
c. ischial containment
d. subischial

A

subischial

65
Q

The flexible socket is incased in a rigid frame which provides _ with _ and helps with socket _

A

support with WB

helps with socket shape

66
Q

The flexible socket is more comfortable in sitting (true/false)

A

true

67
Q

The flexible socket is useful with which type of suspension

a. elevated vacuum
b. silesian belt
c. pull in suction
d. shuttle lock

A

pull in suction

68
Q

In a pull-in suction what 3 things are used to help hold the limb on?

A

negative air pressure, skin to socket contact, and muscle tension

69
Q

What is the most common way to don a pull-in suction socket?

A

pull sock or sleeve

70
Q

_ _ is required to maintain suction with a pull-in suction socket

A

intimate fit

71
Q

Silesian belts control rotation of the limb (true/false)

A

false

pelvic belt and hip joints do

72
Q

What are the drawbacks of a pelvic belt and hip joint?

A

bulky, heavy and uncomfortable when sitting

73
Q

What do users of the single-axis knee have to have?

A

hip control!!

74
Q

A single-axis knee allows for variable cadence (true/false)

A

false

75
Q

A single-axis knee is not good for

a. short residual limbs
b. long residual limbs
c. all of the above

A

short residual limbs

76
Q

During swing, a weight-activated knee acts like what other type of knee?

a. single-axis knee
b. polycentric knee
c. manual locking knee

A

single-axis knee

77
Q

Which knees will not buckle?

a. weight activated
b. manual locking
c. polycentric
d. a and b

A

weight activated and manual locking

78
Q

Which type of suspension would be best for a recent amputee?

a. pull in suction
b. shuttle lock
c. silesian belt
d. total elastic belt

A

total elastic belt

79
Q

Which type of suspension would be best for a short residual limb?

a. lanyard
b. elevated vacuum
c. pelvic belt and hip joint
d. pull in suction

A

pelvic belt and hip joint

Prosthetics (12 decks)

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