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Combined O&P Written practice Questions with Accurate Answers
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Combined O&P Written practice
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Combined O&P Written practiceWhen determining the prosthetic Rx, what factors, after a burn, might limit the use of a
body-powered upper limb prosthesis?
a. phantom limb pain
b. axillary and shoulder region scarring
c. prosthetic weight and stiffness
d. multiple amputations - answerb
In a hip disarticulation prosthesis, the hip joint lies _____ & ______ in relationship to the
trochanter:
a. anterior and superior
b. posterior and superior
c. anterior only
d. posterior only - answera
During quiet standing, stability in the sagittal plane of a hip disarticulation prosthesis is
maintained through which of the following scenarios?
a. the hip joint is placed posterior to the knee joint and the weight line falls between the
hip and knee joints
b. the hip joint is placed anterior to the knee joint and the weight line falls between the
hip and knee joints
c. the hip joint is placed anterior to the knee joint and the weight line falls anterior to the
hip joint
d. the hip joint is placed posterior to the knee joint and the weight line falls posterior to
the hip joint. - answerb
You can increase knee stability for a transfemoral prosthesis incorporating a single axis
knee with hydraulic swing control by
a. appropriate coronal plane socket-knee-foot alignment
b. incorporating 5 degrees of external rotation at the prosthetic knee joint
c. increasing hydraulic resistance to knee flexion
d. the use of a foot with a "soft" heel. - answerd
What is the primary propelling force that accomplishes normal gait progression?
a. ankle plantar flexion
b. forward body fall
c. hip flexion
d. hip extension - answerb
Knee flexion in a hip disarticulation prosthesis is initiated with the
,a. posterior hip bumper
b. anterior hip bumper
c. pelvic lordosis
d. reaction line moving anterior - answera
Which movements are required to operate the terminal device in a standard transradial
prosthesis
a. gleno-humeral flexion only
b. biscapular adduction and gleno-humeral flexion
c. biscapular abduction and gleno-humeral flexion
d. discapular abduction and elbow flexion - answerc
At what point in the gait cycle is the quadriceps most active?
a. mid stance
b. terminal stance
c. loading response
d. terminal swing - answerc
The Mauch SNS hydraulic unit offers all of the following except:
a. varied cadence response
b. weight activated stance control
c. independent swing phase adjustability
d. independent stance phase adjustability
e. free swing mode - answerb
A Chopart amputee commonly has difficulties with balance due to the loss of the
a. plantarflexion musculature
b. anterior lever arm
c. dorsiflexion range
d. medial arch stability - answerb
Normal range of motion for the human knee is
a. 120
b. 135
c. 145
d. 110 - answerb
The insertion of the iliopsoas muscle is
a. lesser trochanter
b. greater trochanter
c. lina aspera
d. trochanteric neck - answera
What is the difference between phantom sensation and phantom pain?
a. phantom pain is pain perceived in the intact part of the limb
b. phantom pain is the same as phantom sensation
,c. phantom sensation is nonpainful perceptions of the missing part of the limb
d. phantom sensation is painful perceptions of the missing part of the limb - answerc
The length of the hip disarticulation prosthesis should be approximately 1/2 inch shorter
than the sound side in order to provide adequate clearance of the toe during gait.
a. true
b. false - answera
What is the correct bench alignment for the foot on a trans-femoral prosthesis?
a. 2-1/2" outset
b. directly under the ischium
c. 12 mm medial to knee
d. 12 mm medial to ischium - answerb
Which muscle functions as an evertor and dori-flexior?
a. peroneous longus
b. peroneous brevis
c. peroneous tertius
d. anterior tibialis - answerc
The standard transhumeral prosthesis dual-control cable must always
a. be off the patient's back
b. pass anterior to the elbow joint center
c. pass directly over the elbow joint center
d. have a slight amount of slack - answerb
Patients with short TF amputations generally exhibit lateral bending of the trunk during
ambulation due to:
a. inadequate suspension
b. residual limb pain
c. loss of adductor musculature
d. weak abductor musculature - answerd
The control system efficiency of the body-powered control for a transhumeral prosthesis
is less than 50%. How will you improve the control system efficiency?
a. add a Teflon liner to reduce the friction
b. move. a lift tab proximal
c. move the lift tab distal
d. decrease the number of rubber bands - answera
Coronal placement of the hip joint requires that the positive model be divided into
______. The coronal position of the joint should reside _____mm lateral to the lateral
_____ mark. In the transverse plane, the hip should be externally rotated 5 to 10
degrees to more closely resemble the sound limb during gait.
a. fourths, 10, third
b. thirds, 10, third
, c. halves, 20, half
d. fourths, 20, fourth
e. thirds, 20, third - answera
A patient returns to your office one week after receiving his definitive transtibial
prosthesis, complaining that his prosthesis has started throwing him forward at heel
strike. The most likely cause of this is
a. insufficient sock ply
b. excessive sock ply
c. change of footwear to one with a lower heel height
d. change of footwear to one with a higher heel height - answerd
When a patient ambulates with a TF prosthesis, anterior distal forces in the socket are
the greatest at which point in the gait cycle?
a. initial contact
b. loading response
c. midstance
d. pre-swing - answerd
The motion needed to operate the elbow lock with a transhumeral triple control harness
is
a. glenohumeral flexion
b. biscapular abduction
c. glenohumeral abduction
d. none of the above - answerc
Which muscles does NOT cross two joints?
a. rectus femoris
b. sartorius
c. gastrocnemius
d. soleus - answerd
A partial foot amputation at the distal end of the mid-tarsal bones:
a. Syme's
b. Trans-metatarsal
c. Lisfranc
d. Boyd - answerb
In a trans femoral prosthesis with a waist band and hip joint, the axis of the hip joint is
placed, relative to the greater trochanter:
a. posterior and proximal
b. posterior and distal
c. anterior and proximal
d. anterior and distal - answera
With a partial foot amputation the foot typically assumes a(n):
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