Sample Test #1 Flashcards
All of the following factors contribute to vaulting with a AK prosthesis except:
a) Prosthesis is too long
b) Excessive Knee Friction
c) Inadequate Suspension
d) Weak Hip Extensors
d) Weak Hip Extensors
The Gluteus Medius is most active during which phase of gait?
Initial Contact
What is a characteristic of a constant friction knee?
reduces “heel rise” and terminal impact at normal cadance
The toe of an AK prosthesis rotates externally at IC, what is a major cause?
PF resistance is too firm
A sac filled with heavy fluid that lies between and boney prominence is called:
Bursa
A lack of total contact in a PTB limb can cause:
Distal Edema
The A-P Measurement of a Bk amputee is taken at what degree of flexion?
15
To check height of the prosthesis the amputee should:
Support their weight equally on both legs
When walking, the normal foot should pass close to the AK prosthetic foot:
To facilitate shift of body weight
Rotation of the foot at heel strike may be caused by
A stiff plantar flexion bumper
If the Ischial Tuberoscity is placed too far toward the medial side of the ischial seat , it results in:
Crowding of the adductor muscles into small area, causing burning sensation
The knee bolt of a prosthesis is normally found to be:
In 5 degrees of external rotation
When the adductor longus tightness is observed during initial fitting of the AK socket you should:
Flare and contour anterior-medial corner
When AK amputee has to arch back in order to maintain COG
Socket was fit without enough initial flexion
As the AK amputee places their weight on the prosthesis the femur presses towards the lateral wall. Because of this the lateral wall should be :
Adducted to stabilize the femur during locomotion
The suction socket prosthesis is aligned so the involuntary alignment stability is minimized and voluntary knee control by stump action is emphasized
In order that a minimum amount of energy is consumed during walking
If a force of 10lbs is exerted on a 5 foot arm of a lever, what force must be exerted on the 2 foot arm to balance it?
25 lbs
In TF, medial whip is caused by
Excessive lateral rotation of knee bolt
In correction of a abducted socket we should:
Release the medial tilt screw and tighten the lateral
When pulling the amputee into the AK socket the most important anatomical landmark is the:
Adductor Longus tendon
When harnessing bilateral amputees , the harness should be
Centered over the vertebral column
The FM wrist disconnect is not recommended for use on:
Shoulder Disarticulation amputees.
The triceps pad is often used with:
Medium and short BE, Short and very short BE
The polycentric hinge is used on which type of amputee:
Short below elbow
The acromion is part of the:
Scapula
The basic BE control motion is gleno-humeral :
Flexion
The acceptable range of gleno-humeral flexion for AE prosthesis application is:
90 degrees
Pronounced terminal impact of a prosthetic knee indicates a need for:
More extension dampening controls
If the ML of the socket is too large: (AK)
Ischial tuberoscity will fall into the socket
What is the result of locating the toe break too far forward in the prosthetic foot
Gives amputee feeling of climbing a hill , causing excess energy consumption.
When hamstring muscles are tight at initial fitting of AK socket, what should yo do?
Relieve lateral border of scarpas Triangle
The force applied to open the terminal device of a BE prosthesis is 7 lbs. How many pounds of force applied at the harness would provide acceptable efficiency?
10 lbs
When a VO hand is opened, it is replaceing function normally provided by?
Extensor digitorium communis and lumbricals
All of the following prehension patterns are provided by prosthetic hands except:
a) Cylindrical
b) Spherical
c) Palmar
d) Lateral
d) Lateral
The main supinator of the forearm is:
Biceps
What are friction wrists?
WE-500 WA-600
T/F The brachioradialis assists in flexion of the elbow
True
T/F The radius rotates around the ulna?
True
T/F In the stable anatomical elbow, the only motion that occurs between the forearm and the humerus is flexion and extension
False
Glenohumeral abduction is performed primarily by the deltoid muscle
True
T/F Triple control simply means there is one cable for elbow flexion, one cable for terminal device operation, and a third for elbow locking
True
The length of the AE humeral section is determined by measuring the sound side from the:
acromion process to the lateral epicondyle
Where should the cross point for a figure 8 harness be located in relation to the 7th cervical vertebrae?
inferior and toward the sound side
The brachioradialis is the primary:
Elbow flexor
During dynamic alignment of an AK prosthesis, the patients trunk bends laterally toward the amputated side . This indicates what problem?
The foot is positioned too far laterally
The Knee Disarticulation offers what features when compared to TF:
Distal End Bearing, Better Rotational Control, More functioning muscle intact.
What adductor muscle is always transected in a knee disaticulation amputation?
Gracillis
Myoplasty is ?
Surgery where the muscles are sewn together
Two main functions of BK cuff suspension?
Prevents Rotation, Suspends Prosthesis
In order to flex the elbow, the TH amputee with a Fig 8 harness must:
Unlocks the elbow and flexes GH joint
The amount of humeral flexion required to fully flex the elbow of a TH prosthesis should not exceed:
45 degrees
The shoulder disarticulation prosthesis is operated primarily by what control motion?
Scapular Abduction
The PF bumper simulates what muscles?
Tibialis Anterior
What are advantages of multi-axial ankles?
Absorbs Torque, Accomodates uneven ground, Minimizes shear forces on skin
What are advantages of joint and corset prosthetic socket design?
Enhanced ML Stability
Better Knee Extension Stop
Greater Weightbearing Distribution
During normal human locomotion, the primary function of the gluteus medias is to:
Maintain lateral stability of the pelvis.
What are advantages of SCSP prosthetic socket design?
Enhances ML Stability
Positive Knee Extension Stop
Less pistoning during swing phase
A self-supending prosthesis
A BE prosthesis with flexible hinges should not inhibit flexion at the elbow more than:
10 degrees
The primary advantage of VC terminal device is:
Graded Prehension
What wrist unit provides the greatest ROM for a bilateral BE Amputee?
Wrist Flexion Unit
What modification is made to the Fig 8 harness for the bilateral BE amputee?
The axilla loops are unecessary
