Exam 2: Transfemoral Amputation Flashcards
Recent amputees with fluctuating edema or unstable weight should have a pull-in suction suspension (true/false)
false
Lanyard suspension is more common in transfemoral than transtibial (true/false)
true
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
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
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
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
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
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
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
What type of socket material is vacuum formed with any number of flexible thermoplastic materials?
a. rigid
b. flexible
c. gel
d. soft
flexible
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
Which type of socket design is more comfortable during sitting, less durable, more bulky to wear and more expensive?
a. flexible
b. rigid
flexible
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
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
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
The shuttle lock is a _ and _ system
pin and lock
Roll-on suspension liners are like _ liners
gel
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
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
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
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
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
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
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
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
