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Prosthetics Written Questions and Answers Graded A+
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Exam of 22 pages for the course Prosthetic Written at Prosthetic Written (Prosthetics Written)
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Prosthetics WrittenThe Ertl procedure is known as an osteomyoplastic amputation reconstruction that
performs a bone bridge between what: - answerTibia bridged with the fibula
A TT amputee is seen in your clinic for a follow up appointment and states he feels
anterior/distal discomfort in his prosthetic socket. Choose all correct answers to address
this problem: - answerExtend the prosthetic socket
Add pretibial pads to the prosthetic socket
A TT amputee is seen in your clinic for a follow up appointment and states he has
posterior knee or hamstring discomfort. Choose all the correct answers to address this
problem: - answerLower the posterior medial brim on the prosthetic socket
Flex the prosthetic socket
Align prosthetic foot more posterior in relation to the prosthetic socket
Which levels of amputation may lead to an equinus gait deformity: - answerLisfranc
amputation
Chopart amputation
Transmetatarsal amputation
A TT amputee presents wearing a PTB style endoskeletal prosthesis with general knee
pain and distal end pressure. Patient doffs her prosthesis and liner, upon examination of
her residual limb you note redness on the distal tibia and inferior aspect of the patella
bone. What would be the most logical clinical actions you could take: - answerAdd
gastroc pad to the prosthetic socket
Add 1 ply prosthetic sock over liner
Myodesis can be described as: - answerThe suturing and permanent attachment of
muscle to bone
Which is not part of a Symes amputation procedure: - answerTransmetatarsal
amputation
Myoplasty can be described as: - answerThe suturing or permanent attachment of a
muscle to another muscle
What are the two advantages of myodesis over myoplasty with regards to amputations?
- answerDecreased rate of muscular atrophy
Decreased rate of antagonistic muscular imbalances
,During heel strike, the forward hip is flexed: - answer25 degs
Which style of muscular tissue management in a TH amputation would be of greatest
advantage to a myoelectric prosthesis candidate: - answerMyodesis
A TF patient is seen in clinic that exhibits lateral/proximal loss of contact in stance.
Upon prosthetic fit examination it is noted the lateral wall is superior to the greater
trochanter, the anterior walls contours to the adductor longus tendon, the posterior
socket does not encompass the IT, the medial wall is located 65 mm inferior to the
perinuem. What do you attribute to the cause of this deviation? - answerThe medial wall
is located too far inferior to the perinuem. (When medial wall is too distal, the counter
force with the lateral wall is lost causing the socket gap laterally, impinging the
adductors, and losing optimal grasp of the IT)
With a Krukenburg procedure what muscle is the primary driver of the pincer grip? -
answerPronator teres
What would be good qualities to look for in a prosthetic foot for a TT amputee who is a
K2 designated household ambulator that utilizes his prosthesis efficiently during the day
but fatigues in the evening and buckles at the knee secondary to quadriceps weakness?
- answerFoot that progresses rapidly into plantarflexion during loading response
Heel should have a relatively soft durometer
Today in clinic a TT patient is seen presenting with a traditional exoskeletal PTB
prosthesis with a SACH foot. Patient states that she feels like the prosthesis is throwing
her knee forward as soon as the heel firmly contacts the ground. She has worn this
prosthesis comfortably for two years until one month ago. What should be the first
clinical action you should take at this time in the appointment? - answerCheck to see if
the patient switched to a shoe with a higher heel height compared to what she used to
wear
The Krukenburg procedure is used at times in developing countries where expensive
prostheses are not attainable; what other patient populations would this be potentially
used for: - answerBlind patients with bilateral TR amputations
Failed prosthetic use for bilateral TR amputations
A TR patient is seen in your clinic. The patient is inquiring as to which terminal device
would be best for picking up a small coin from the table. Which device do you
recommend? - answer5XA (has a non-symmetrical or "canted" approach which allows
better vision of the object being manipulated, making it easier to grasp the object)
What are simple options for increasing the ease of pre-positioning the prosthetic elbow
in flexion, for a TH amputee utilizing body powered prosthesis who lacks glenohumeral
flexion strength and biscapular abduction strength but can operate an elbow lock: -
answerHave forearm lift tab moved proximal/anterior (moves the pull angle anterior to
bridge the elbow joint decreasing the force necessary to move the forearm
, Check the level of resistance in the cable housing
What bony landmark is utilized for a weightbearing prosthesis in a hip disarticulation? -
answerIschial tuberosity- same as TF patients
What is an option for pre-positioning the prosthetic elbow in flexion, for a TH amputee
utilizing a triple control body powered prosthesis who lacks glenohumeral flexion
strength and biscapular abduction strength but can operate an elbow lock: -
answerChange triple control to dual control, switch split housing to single housing,
utilize ballistic motion for forearm lift (option for gathering vs harnessing energy for use
as force elsewhere)
Why is choosing a SACH foot with a firm heel durometer not advised for TT patients
with poor prosthetic side knee stability? - answerIt will decrease knee stability (GRF
moves anterior to knee joint slower; slower to reach foot flat)
You are doing a gait assessment with your patient that has a TT prosthesis. You notice
there is lateral truck bending at mid stance to the prosthetic side. What would NOT be a
potential cause of this gait deviation? - answerWeak quadriceps (doesn't account for
lateral truck bending, but would contribute to abrupt knee flexion)
A TF patient is seen at clinic and noted that he ambulates with a circumducted gait.
Select ALL possible causes: - answerProsthesis height is longer than his sound side IT
to floor measurement- to clear prosthetic foot
Prosthetic suspension is not adequate- to clear prosthetic foot
The user does not have adequate hip flexor strength- other muscles may be recruited to
clear prosthetic foot
Prosthetic foot is plantarflexed excessively- relative leg length discrepancy created
A TF patient is seen in clinic. In stance, the prosthetic foot "smears" externally as she
simultaneously abducts her prosthesis whereby advancing forward in the sagittal plane.
She complains of low back pain as well. What is the prosthetic cause? - answerNot
enough flexion built into the socket (leads to compensatory motions for forward
progression and compensatory hyperlordosis)
A TF patient is seen in clinic. During gait analysis you find she has knee instability while
standing and you see knee buckling with any weight shift. You suspect the cause of
instability is: - answerProsthetic knee is set too far anterior to the TKA line. Knee
anterior to TKA line leads to poor stability and buckling
TT sockets that are excessively extended cause excessive pressure in what areas: -
answerAnterior/proximal
Posterior/distal
T/F Outsetting the prosthetic foot on a TT prosthesis increases socket pressure
medial/distal and lateral/proximal - answerTrue (by creating valgus moment at knee)
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