Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
17 Cards in this Set
- Front
- Back
|
Types of AK knees (8)
|
1. friction (constant)
2. locking (safety/manual) 3. Polycentric 4. safety and pneumatic/hydraulic 5. hydraulic (swing only) 6. hydraulic (swing and stance) 7. stance flexion feature 8. Microprocessor control knee |
|
|
When might a friction knee be used in AK patients?
|
good for new, stable amputees
or stable hip disarticulation where you set hip posterior |
|
|
When might a locking (safety/manual) knee be used in an AK patient?
|
- less residual limb control
- max security need - balance problems |
|
|
When might polycentric knees be used in an AK patient?
|
- gives amputees increased stability
- toe elevates during swing through |
|
|
When might safety and pneumatic/hydraulic knees be used for AK patients?
|
- less residual limb control
- allows for variable cadence ambulation - higher potential than present abilities |
|
|
Describe hydraulic swing only units for AKs.
|
- provides cadence responsiveness
- heavier than other knees |
|
|
Describe hydraulic swing + stance units for AKs.
|
- cadence responsiveness
- heavier that other knees - locks itself during stance - step over step down stairs |
|
|
Describe when you might use stance flexion feature.
|
- provides flexion at midstance with stability (however, feels unstable as knee yields under the weight)
- decreased COG motion (pelvis) and decreased energy expenditure |
|
|
Describe why someone may benefit from a microprocessor control knee.
|
- decreased falls
- stumble recovery ** NOT able to be used with high sports levels |
|
|
Which feet CANNOT be used with C legs?
|
vertical loading feet (don't work well d/t sensors in legs)
SACH feet |
|
|
What are the 2 socket designs for AK?
|
1. quadrilateral
2. ischial containment |
|
|
Describe the quadrilateral socket design.
|
- contours to expected mm shape of activity
- NO soft top construction |
|
|
Describe the ischial containment.
|
- reduces shear on residual limb at medial aspect
- flexible top |
|
|
Types of suspension for AKs (3)
|
1. strap/partial suction
2. self-suspension 3. pin locking/lanyard mechanisms or liners |
|
|
Describe partial suction or strap suspension in AK.
|
- stabilize ML plane and rotation
- easier to don - tolerates more residual limb change - used with SOCKS |
|
|
Describe self suspension suction in AK.
|
- better proprioception (than partial suction)
- better balance and strength to don - not used if still fluctuating in size - donning sleeves/lotion |
|
|
Describe pin locking/lanyard mechanisms or liners in AK.
|
- provides liner to reduce shear
- applied while sitting - can be hard to line pin up |
