UE Amputation Flashcards
(42 cards)
___% of all amputations are upper limb loss
3%
what are common causes of UE amputations?
trauma
tumor
what are problems specific to UE amputations?
self esteem
psychological impact
less research
loss of dexterity
different grasping patterns
shaking hands
hand dominance
when should we fit a patient with an UE prosthesis for best outcomes?
the earlier the better
which digit would be indicative of worse prognosis in a partial hand and digit amputation?
thumb –> used more for function
wrist disarticulation:
– better potential for ______
– allows _______ at terminal end
– better surface area for _____
– limited prosthesis options due to ______
– active supination/pronation
– WBing
– suspension
– short working length
transradial:
– (more/less) favored and prosthetic options
– (easier/harder) prosthetic fit
– preservation at _____ for ideal function
– at least ______ of ulna necessary for functional use of elbow
– more
– easier
– elbow
– 5 cm
in children, is elbow disarticulation or transhumeral amputation more desirable? why?
elbow disarticulation
- transhumeral amputations result in higher incidence of bony regrowth
in adults, is elbow disarticulation or transhumeral amputation more desirable? why?
long transhumeral favored - at least 5-7 cm of humerus to preserve shoulder function and prosthesis use
- elbow disarticulation allows for better device suspension and control
harness suspension, self-suspending, and adjustable sockets are all _____ designs
socket
suspension methods:
– one-way valve, passive
– active pump (noisy), minimizes pistoning
– over socket & connects with skin to stay on
– shuttle ____/pin
– suction
– vacuum
– outer sleeve
– lock/pin
what suspension method has good implications for a patient that has skin breakdown and sweats a lot?
– with this suspension method, what do you need to be cautious about?
osseointegration
– fractures –> rod always sticks out
liner (gel or silicone), socks, and flexible inner socket are all __________
– which one is most common?
sockets interaces
– liner
cosmetic/passive prosthetic:
– active/electronic parts??
– intended to:
– primarily for _____ use
– may assist with:
– no
– closely resemble natural body part
– cosmetic
– pushing, balancing, or supporting objects
what ROM needs to be addressed for each level of amputation:
– transhumeral
– transradial
– wrist disarticulation & long transradial
– any level
– shoulder depression, extension, abduction
– elbow flexion, extension
– forearm pronation and supination
– scapular abduction and humeral flexion
how are body powered prostheses powered?
exaggerated movement of shoulder/s, neck and back
harness systems
how do the body powered prostheses voluntarily open and close?
tension is applied to the cables
in someone with a transradial amputation and body powered prostheses, how is tension created to open and close?
shoulder flexion and scapular protraction
in someone with transhumeral amputation and body powered prostheses, how is tension created to open/close and lock elbow?
- shoulder flexion, scapular protraction for elbow control
- lock elbow using shoulder extension and scapular depression to control terminal device using a dual cable
what are advantages of body powered prostheses?
lower initial cost
lighter weight
easy to repair
what are disadvantages of body powered prostheses?
mechanical appearance
lack fine motor control
may be difficult to use
how does externally powered/myoelectric prostheses work?
user contracts muscles of the residual limb, generating EMG signals that control the motor of hand/wrist/elbow functions
what are advantages of externally powered/myoelectric prostheses? (3)
no harness or cable system, built to look more realistic
battery powered - doesn’t depend on patient strength
provide a forceful grip
what are disadvantages of externally powered/myoelectric prostheses? (4)
higher initial cost
heavier
higher cost to repair
poor battery life
