Exam 2: Transfemoral Amputation Flashcards by Madelynn Kahl

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

false

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

true

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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

total elastic belt

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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

ischial containment

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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

marlo anatomical

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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

subischial

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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

2-4 inches

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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

rigid

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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

rigid

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

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

flexible

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

false

this is describing a flexible socket material

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

a. flexible
b. rigid

flexible

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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

pull-in suction

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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

pull in suction

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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

cushion with air expulsion valve

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The shuttle lock is a _ and _ system

pin and lock

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Roll-on suspension liners are like _ liners

gel

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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

lanyard

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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

elevated vacuum

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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

Silesian belt

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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

lateral
pelvis
anterior

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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

total elastic belt

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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

pelvic belt and hip joint

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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

pelvic belt and hip joint

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What type of liner will help fit a bulbous distal end of a residual limb? a. soft liner b. gel liner

gel liner

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

single-axis

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

alignment and muscle control

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

single axis knee

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

false

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

polycentric knee

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

polycentric knee

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

true

What is the disadvantage of a polycentric knee?

multiple mechanical joints and durability

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

weight-activated

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

weight-activated

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

weight-activated control

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

manual locking knee

What does a manual locking knee compromise? a. stance stability b. step length c. mobility and toe clearance

mobility and toe clearance

Hydraulic knees use _ through channels for _

fluid, resistance

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

hydraulic knee

A hydraulic knee provides resistance to improve a. stance control b. stability c. friction d. shear forces

stance control

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

high maintenance | high cost

A Pneumatic knee uses _ _ dynamics like hydraulics

air pressure

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

true

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

microprocessor knees

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

microprocessor

A microprocessor will decrease a. step length b. stance phase stability c. energy expenditure d. swing phase

energy expenditure

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

next-generation knee

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

next-generation knee

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

extension aids

type of aid | _ _ get tight as the knee flexes and pulls the knee forward as it is coming through

extension aids

Which type of aid allows uses to rotate and bend their knee up? a. torque aids b. transverse rotation units c. extension aids

transverse rotation units

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

influence on knee stability during stance

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

dynamic response

Bench alignment ensures _ stability

knee

Static alignment looks at the patient a. walking b. standing c. sitting d. none of the above

standing

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

iliac crests

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

2-3 inches

Lateral alignment looks at what 4 key areas?

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

What is looked at the most with lateral alignment? a. knee stability b. knee flexion c. step duration d. step length

step length

Anterior alignment looks at what 4 key areas?

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

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

Silesian belt

Which socket design keeps from rotating around the limb? a. quadrilateral b. CAT-CAM c. ischial-ramal containment d. Marlo Anatomical

CAT-CAM

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

subischial

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

support with WB | helps with socket shape

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

true

The flexible socket is useful with which type of suspension a. elevated vacuum b. silesian belt c. pull in suction d. shuttle lock

pull in suction

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

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

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

pull sock or sleeve

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

intimate fit

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

false | pelvic belt and hip joints do

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

bulky, heavy and uncomfortable when sitting

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

hip control!!

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

false

A single-axis knee is not good for a. short residual limbs b. long residual limbs c. all of the above

short residual limbs

During swing, a weight-activated knee acts like what other type of knee? a. single-axis knee b. polycentric knee c. manual locking knee

single-axis knee

Which knees will not buckle? a. weight activated b. manual locking c. polycentric d. a and b

weight activated and manual locking

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

total elastic belt

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

pelvic belt and hip joint