Prosthetic Feet Flashcards
1
Q
Non-Articulating SACH Foot
A
- solid ankle cushioned heel
- commonly prescribed
- simple
- low cost
- no articulations
- relies on cushioned heel to control initial to foot flat
- best for level ground and limited community ambulators
2
Q
Articulating Design
SIngle Axis and Multiaxial Feet
A
- foot that allows for plantar and DF via some mechanism of bumpers and an axis pin
- stimulates actions of the gastroc/soleus and anterior tib
- reduces flexion torque at the knee at initial contact
- advantages
- reduced torque on knee and therefore decreased pressure on residual limb
- accommodates uneven terrain
- Disadvantages
- weight, mechanical complexity, noisy, cosmesis
- Single Axis
- primary advantage - able to reach foot flat position quickly in early stance
- Multi Axis
- gressinger foot
- college park foot
- endolite multiflex foot
- advantage = foot can accomodate uneven terrain >1 plane
- requires strength and regular maintenance
3
Q
Prosthetic Feet with Elastic Keel
SAFE Feet
A
Standard Attachment flexible endoskeletal = SAFE
- advantage = smother gait pattern and higher functioning foot with less maintenance or weigh relative to articulated foot
- disadvantage = may feel spongy to some and not stiff enough to active/athletic individuals
4
Q
Dynamic Response or Energy Storing Designs
Seattle Foot, Flex foot
A
Seattle
- released in early 1980s and was considered a dynamic response foot
- absorb and store forces during loading and then release this energy during push off
Flex Foot
- variations
- good for engaging in high demand activities
- more energy efficient
- but have higher cost and not for weaker pt
Springlite foot
- dynamic response foot
5
Q
Energy Return Percentages
A
- SACH = 0%
- Seattle = 70%
- Flex = 90%
- Human = 260%