TTA Flashcards
If pt has the ability or potential to use a prosthesis for transfer or ambulation on level surfaces at a fixed speed, they are considered what Medicare level?…
K1
If a pt has the ability/potential for ambulation with variable cadence (my have exercise beyond simple locomotion) they are — Medicare level
K3
If pt has ability/potential for ambulation on low level environmental barriers , their Medicaid level is a..
K2
“normal” TTA is..
20-50% of limb is spared
what part of a foot/ankle assembly determines the stability/mobility?
the KEEL length & material
3 energy storing feet/ankles:
- C-spring (i.e. Seattle foot)
- Deflection plate
- posterior leaf
Advantages/disadvantages of the SACH foot (NAR/NES):
adv: light weight, inexpensive, common, all sizes; simple STABLE, quiet, low maintenance, DURABLE
Disadv: very LMTD mvmt, NES
for a bariatric, inactive patient, what kind of ankle/foot assembly would be appropriate?
Heavy Duty NAR/NES for up to 350 pounds
what is the SAFE foot?
NAR/NES, more flexible than the SACH BUT Heavier & MORE EXPENSIVE than SACH
What is the Seattle foot? Is it better than the SACH/
NAR/ES; looks like an actual foot (yay!), heavier & costlier than the SACH BUT energy storing so depends on your purpose
What kind of energy storing prosthetic is prescribed for geriatric patients?
Seattle Lite Foot
What prosthetic foot has the highest mechanical energy return?
Deflection (90%) – but PLS also >90% nrg returning
How expensive are the deflection plate and Seattle foot as compared to the SACH?
2x as a expensive
what modification of the deflection plate allows for INV/EVR?
split toe and/or heel
the feet high heels is adjustable up to ..
2 inches
what is the only foot shown to reduce metabolic cost of walking?
PLS
What would be a helpful foot for an arthritic patient?
PLS reduces wear on knee joints in arthritic patients
in general, ankle joints’ disadvantages:
add weight and cost; also more complicated, less durable (bumpers and joints wear out) and noisy
what kind of AR/NES allows for increased knee stability? WHY?
single axis – allows for inclines/declines
what type of foot is useful on uneven terrain
AR/NES multiaxis
what produces greater GRF forces - AR or NAR?
articulating
what is the advantage of Proprio Foot applications?
Swing phase ankle DF
Remote foot adjustment
what kind of shank would you use for preschoolers ?
exoskeleton ( more durable!)
ideal socket material?
polypropylene - easy to clean, light, permanent
what material should the liner be?
soft pelite or polyethylene
The PTB socket emphasizes…
WBing on patellar tendon
what type of PTB socket allows for ms expansion ?
ISNY PTB with a flexible inner PTB socket
which interface DECREASES FRICTION
nylon socks
if the patient has a thin thigh, what auxillary items should you add to the prosthesis?
supracondylar cuff (with a PTB socket)
if a pt has HEAVY, MUSCULAR thighs then they should use — suspension system
sleeve (neoprene)
what type of suspension system can facilitate hip flexion in swing phase?
waist belt with strap (ALSO doesn’t interfere with colostomy bag)
if a patient has a history of mediolateral knee instability, what type of suspension would you prescribe?
subcondylar socket with a thigh corset – has uprights
how do you know that a Silicone 3S is in the socket properly to provide suction between interface and skin?
3 clicks
when donning a silicone suction TT, you must…
turn silicone liner inside out when powder the outside of the silicone liner by pouring in a little powder & shaking
seal-in v 3S silicon suction
seal-in less maintenance, can fit longer limb, less pistoning BUT more difficult to don correctly
what kind of sock can you use with a vacuum assisted TT?
do NOT use a fabric sock
