UE Prosthetics Flashcards
Most UE amputees happen from ________ accidents or ________ injuries.
- industrial
- combat
- __% of congenital amputations are UE.
- __% of traumatic amputations are UE.
- 60%
- 70%
If a UE amputation is due to cancer (CA), it will usually be /.
A/E (above elbow)
Is scar placement critical in UE amputations?
No, we don’t typically WB on arms.
-Stll important to have good scar mobility.
What are some levels of UE amputations?
- Wrist disarticularion
- Forearm (lose pro/sup) (as distal as possible)
- Elbow disarticulation
- Above Elbow (as distal as possible)
With UE amputations, the prosthetic arm may be left slightly shorter, why?
When the arm is hanging at the side, it tends to look longer because it is “lifeless”.
What are some bony landmarks to consider with UE amputees.
- C7: harness ring below
- Clavicle: site of breakdown
- Acromion: to measure length of residuum
- Scapula: need good mobility
Why is scapular mobility so important?
You have to have good mobility to operate tension of cable that operates the terminal device for the hand.
Why will amputees prefer a hook over a hand?
- It is functional and durable.
- Can see through it to manipulate objects since they don’t have sensation.
With a B/E harness, by either moving the ______, or going into shoulder ________ or ________ they will create tension on the cable.
- scapula
- shoulder flexion or abduction
What is a voluntary open device?
When tension is placed on the cable (flexion), it will put tension on the terminal device and open it.
B/E Harness System:
- Shoulder flexion _______ cable and operates terminal device.
- Shoulder extension ________ cable and closes terminal device.
- Shoulder abduction augments ________.
- tightens
- relaxes
- flexion
In A/E Harness Systems, the ____ cable will operate both the elbow and the terminal device.
same
With an A/E harness system, through a motion of shoulder _______, _________, and a little _________ they will lock the elbow.
depression, extension, a little abduction
What does a locking of the elbow do?
Allows any additional tension to be placed on the terminal device to open it.
With an A/E Harness System, the elbow must be ______ to operate the terminal device.
locked
Myoelectric System will use ____ sensors. How does this work?
EMG
-Sensors in the prosthetic will act on muscles that are left over and will act on the terminal device.
With the Myoelectric System, typically ______ will close the hand and _______ will open the hand.
- flexors
- extensors
What are some problems with the Myoelectric System?
- heavy
- make noise
- breaks
- needs to be charged
Myoelectric system is suspended through what systems?
- Pin and lock
- Suction
- Supracondylar
If there is damage to the forearm muscles, what can be done?
Electrodes can be imiplanted in chest or back as well.
On The Horizon Devices
- Independent Finger Motion
- Targeted Muscle Reinnervation
- Osseointegration
- Neural Prosthesis Interfaces
1
1
1
1
Targeted Muscle Reinnervation provides more intuitive control. How is this done?
Nerves from the brachial plexus in residuum are transferred to target mm that no longer perform function. Augments signal to muscle for easier and enhanced prosthetic control.
With Targeted Muscle Reinnervation, nerves grow into new target tissue and this enhances _______ of the myoelectric arm.
control
Targeted Muscle Reinnervation is only for ________ disarticulation or __________.
- shoulder
- transhumeral
Osseointegration involves __ surgeries __ months apart.
2 surgeries 6 months apart
What is the idea behind Neural Prosthesis Interfaces?
Taking signals from the brain, and through a neural interface and processing unit, they take what you are thinking and send it to the terminal device.
With Neural Prosthesis Interfaces we can get ________ control as well as feed-forward control.
- Feedback, other prosthesis can’t do this.
- Example is if something is slipping in hand, sensation of that goes to the brain and tells the hand to close tighter.
