Prosthetics: Componentry Flashcards
Influencing factors: Single axis knee
Reciprocating gait
Difficult to reciprocate gait
Influencing factors: single axis knee
Friction
Constant friction mechanism
Influencing factors: single axis knee
Knee extension/stance phase
May or may not have
- knee extension assist and/or
- weight-activated stance phase control
Influencing factors: polycentric knee
Reciprocal gait
Reciprocal gait is more fluid than single axis knee
Influencing factors: polycentric knee
Weight
Heavier than single axis
Influencing factors: polycentric knee
Friction
Constant friction mechanism
Influencing factors: polycentric knee
Knee extension/stance phase
May or may not have
- knee extension assist and/or
- weight-activated stance phase
Influencing factors: hydraulic knee
Benefits: friction, control
- variable friction for improved swing
- stance phase control
Influencing factors: microprocessor knee
Benefits
- Multiple programs to accommodate activity level
- Fluid management of stair descent
- variable friction for improved friction and stance phase control
Influencing factors: microprocessor knee
Drawback
Requires charging
Influencing factors: SACH foot
Benefits
- Inexpensive
- Low maintenance
- Cushioned heel for shock absorption
Influencing factors: SACH foot
Drawbacks
- Non-articulating with a rigid heel
- Lacks energy return
- Can’t accommodate to uneven surfaces
Influencing factors: single axis foot
Plane of motion
Allows motion in singular plane
Influencing factors: single axis foot
Benefit (weight bearing)
Improved knee stability during weight acceptance
Influencing factors: single axis foot
Drawback
Lacks energy return function if not paired with a dynamic response foot
Influencing factors: dynamic response foot
Articulating?
Can be articulating or nonarticulating
Influencing factors: dynamic response foot
Keel
- Has the ability to store and return some energy
- may have split keel
Influencing factors: dynamic response foot
Benefit of split keel
Improved surface accommodation
Influencing factors: hydraulic/microprocessor foot
Benefits
- improved shock absorption
- Finer control over stability/mobility of motions
Influencing factors: hydraulic/microprocessor foot
Drawback
Not appropriate for all environmental conditions
