prosthetics Flashcards
(146 cards)
question
answer
In patients aged 15 to 50, what is the most common cause of lower extremity amputation?
A) Trauma
B) Cancer
C) Infection
D) Vascular disease
A) Trauma
In general, what is the most common type of amputation seen among new amputees?
A) Transfemoral
B) Syme’s
C) Transtibial
D) Hip disarticulation
C) Transtibial
The most common type of amputation is a transtibial or below knee amputation (BKA). Transfemoral or above knee amputations are approximately half as common as BKA, whereas Syme’s (ankle disarticulation) and hip disarticulation are very uncommon.
In a standard transtibial amputation, the amputation is approximately what percentage of the tibial length?
A) < 20
B) 20 to 50
C) > 50
D) > 75
B) 20 to 50
A standard transtibial amputation is 20% to 50% of the tibial length. A long transtibial is > 50% of the tibial length, whereas a short transtibial amputation is < 20% of the tibial length
Which of the following is an amputation at the tarsometatarsal junction?
A) Transmetatarsal
B) Syme’s
C) Lisfranc
D) Chopart
C) Lisfranc
. Transmetatarsal - midsection of all metatarsals
. Syme’s - ankle disarticulation
with attachment of heel pad to distal end of the tibia
. Chopart - midtarsal amputation where
only the talus and calcaneus remain
What is the ideal shape for a transtibial residual limb?
A) Rectangular
B) Conical
C) Pyramidal
D) Cylindrical
D) Cylindrical
. Conical is best after a transfemoral amputation
In the postoperative management of the residual limb a “shrinker” should be worn for
how many hours out of the day?
A) 24
B) 12
C) 8
D) Shrinkers are not utilized after amputation
A) 24
Which of the following would be acceptable in contracture prevention for the transtibial amputee?
A) Sitting with the knee extended on a towel-wrapped board under the wheelchair cushion
B) Sitting with the residual limb hanging over the edge of the bed
C) Sitting with a pillow placed under the knee
D) Sitting with a pillow placed between the legs
A) Sitting with the knee extended on a towel-wrapped board under the wheelchair cushion
All others would lead to either knee flexion or hip flexion contractures.
All of the following are components of a transtibial prosthesis except:
A) Socket
B) Rotor
C) Shank
D) Suspension
B) Rotor
All of the following are pressure-tolerant areas for a below knee amputation prosthetic
except:
A) Patellar tendon
B) Medial tibial flare
C) Fibular head
D) Popliteal fossa—gastrocsoleus muscles
C) Fibular head
reliefs must be built into this
area in order to ensure that skin breakdown or damage to the peroneal nerve does not
occur
Which is not a pressure-sensitive area in regard to lower extremity prosthetics?
A) Pretibial muscles
B) Hamstring tendons
C) Patella
D) Distal tibia
A) Pretibial muscles
Which of the following prosthetic foot is the most affordable?
A) Multiaxis foot
B) Solid ankle cushion heel (SACH)
C) Energy storing
D) Single-axis foot
B) Solid ankle cushion heel (SACH)
The single-axis foot permits movement of the foot-ankle complex in the plantar flexion/dorsifl exion axis, whereas the multiaxis foot allows some controlled movement in the normal anatomic planes (plantar flexion, dorsiflexion, inversion, eversion, and rotation).
Which of the following prosthetic options would allow for participations in most vigorous sports?
A) Flex-foot
B) Single-axis foot
C) Rigid keel
D) Multiaxis foot
A) Flex-foot
Tenderness on the anterior distal femur, lateral lurch when walking, and increased skin irritation at the ischium and pubis are all disadvantages of which above knee amputation socket?
A) Narrow mediolateral
B) Ischial containment
C) Contoured Adductor Trochanteric-controlled Alignment Method (CAT-CAM)
D) Quadrilateral transfemoral
D) Quadrilateral transfemoral
The Silesian belt, total elastic suspension belt, and pelvic band are all types of suspension for which type of prosthesis?
A) Below knee amputation (transtibial)
B) Above knee amputation (transfemoral)
C) Hip disarticulation
D) Syme’s amputation
B) Above knee amputation (transfemoral)
Other suspension systems for the transfemoral prosthesis include the suction socket (total suction vs. partial suction) and gel liners with a pin or strap.
Which of the following knee units cannot be used in someone with bilateral transfemoral amputee?
A) Polycentric/four-bar knee
B) Manual locking knee
C) Stance control knee
D) Fluid controlled knee unit
C) Stance control knee
Brawny edema, induration, and discoloration of the skin of the distal stump in a circular shape may indicate which dermatologic complication in an amputee?
A) Allergic dermatitis
B) Epidermoid cyst
C) Folliculitis
D) Choked stump syndrome
D) Choked stump syndrome
This may result when the residual limb becomes too large to fi t properly in the total contact socket. The socket will become too tight proximally and therefore obstruct venous outfl ow. An edematous distal residual limb will result. Folliculitis, cysts, and dermatitis are all potential complications of a prosthesis, yet do not result in edema and induration.
Which dermatologic complication results from inadequate socket wall contact with subsequent edema formation causing wart-like skin overgrowth?
A) Tinea corporis
B) Verrucous hyperplasia
C) Hyperhidrosis
D) Folliculitis
B) Verrucous hyperplasia
Tinea corporis mainly results from sweating and can be prevented and treated with good socket hygiene and antifungal medications. Hyperhidrosis
may cause maceration of the skin, which predisposes the skin to infection. Folliculitis is
an infection of the hair root resulting from poor hygiene, sweating, and either pistoning
or poor socket fi t.
Which of the following describes an awareness of a nonpainful sensation in the amputated part?
A) Allodynia
B) Phantom pain
C) Hyperalgesia
D) Phantom sensation
D) Phantom sensation
All of the following are reasonable pharmacologic interventions for the treatment of phantom pain except:
A) Tricyclic antidepressants
B) Serotonin reuptake inhibitors
C) Narcotics
D) Anticonvulsants
C) Narcotics
In addition to the other answers, norepinephrine reuptake inhibitors, calcitonin, capsaicin, and propranolol are reasonable pharmacologic medical interventions
When compared with normal walking without a prosthesis or assistive device, which condition requires the greatest increase in energy expenditure?
A) Transtibial amputation
B) Transfemoral amputation
C) Bilateral transtibial
D) Wheelchair use
B) Transfemoral amputation - 99%
transtibial - 23%
bilateral transtibial - 41%
wheelchair - 9%
Which type of amputee will expend the most energy when being compared with normal walking?
A) Transfemoral-transtibial
B) Bilateral transtibial
C) Transfemoral with use of crutch
D) Transfemoral
A) Transfemoral-transtibial - 118%
bilateral transtibial - 41%
transfemoral with use of a crutch - 92%
unilateral transfemoral - 99%
What will be the result of a heel cushion that is too soft, or a prosthetic foot in excessive plantarflexion?
A) Excessive knee flexion
B) Insufficient knee flexion
C) Excessive knee extension
D) Insufficient knee extension
B) Insufficient knee flexion
In describing prosthetic feet, what does SACH stand for?
A) Solid action cushioned heel
B) Single-axis ankle cooperative heel
C) Single assembly coordinated heel
D) Solid ankle cushioned heel
D) Solid ankle cushioned heel
It is the most commonly used prosthetic foot.