Q1: TT Suspension Methods Flashcards
1
Q
Anatomical Suspension Methods
A
- joints and corset
- waist belt and fork strap
- supracondylar
- supracondylar cuff
2
Q
Mechanical Suspension Methods
A
- knee sleeve
- locking liner
3
Q
Atmospheric Suspension Methods
A
- passive suction
- active vacuum
4
Q
Joints and Corset
A
- Mechanical joints are attached to proximal aspect of socket
- joint uprights are contoured to patient thigh
- thigher lacer, or corset, is attached to joint uprights
5
Q
Joint and Corset advantages
A
- very durable
- user adjustable
- ML stability
- Axial loading through thig lacer partially off-loads RL
- Hyperextension stop
6
Q
Joint and Corset Disadvantages
A
- Heavy
- bulky
- loud
- pistoning
7
Q
Joint and Corset Indications
A
- ML instability
- Heavy duty used
- long term satisfaction
8
Q
Waist Belt and Fork Strap
A
- belt is attached around waist, the base for this suspension method
- elastic webbing allows comfortable knee range of motion
9
Q
Waist belt and fork strap advantages
A
- user adjustable
- sensory feedback
- easy to visually verify
10
Q
Waist belt and fork strap disadvantages
A
- bulky
- pistoning
11
Q
Waist belt and fork strap indications
A
- early fittings
- auxiliary suspension
12
Q
supracondyalr advantages
A
- self-suspending
- low profile
- provides increased ML stability
13
Q
supracondylar indications
A
- ML instability
14
Q
supracondylar contraindications
A
- excessive soft tissue or firm muscle proximal to condyles
- high activity
15
Q
Supracondylar w/ removable brim indication
A
Ml-PML > 25 mm
16
Q
Supracondylar Cuff
A
- wrap around the distal thigh proximal to femoral condyle
- suspension occurs over the patella
17
Q
Supracondylar Cuff advantages
A
- user adjustable
- sensory feedback
- low cost
18
Q
Supracondylar Cuff indications
A
- PTB socket design, patient has good ML stablitiy
19
Q
Knee Sleeve
A
- mechanism is friction
- sleeve adheres to outer surface of patient’s thigh proximally
20
Q
Knee sleeve disadvantages
A
- traps heat
- added bulk around knee
21
Q
knee sleeve contraindictions
A
poor hand dexterity
22
Q
Locking Liner
A
- gel liner with pin attachment adheres to residual limb
- pin attachment engages into mechanical lock in distal end of socket
23
Q
Locking Liner Advantages
A
- audible click to confirm suspension
- quick and easy donning
- accommodats volume change readily
24
Q
Locking Liner Disadvantages
A
- pistoning
- maintenance
25
Suction Advantages
* reduced pistoning
* potential for reduced in-socket rotation
26
Suction Disadvantages
* chance of material failure
* bulk
* heat
27
Suction contraindications
expected volume changes
28
Active Vacuum
* use of liner
* sealed system
* inner or outer seal
29
Active Vacuum Advantages
* minimizes pistoning
* minimizes rotation
* reduces normal daily volume fluctuations
30
Active Vacuum Disadvantages
* counter intuitive for prosthetists
* maintenance
31
Active Vacuum Contraindications
* lack of user cognition or acceptance of system
* gross volume fluctions
32
osseointegration advantages
* eliminates need for traditional socket
* ease of donning
