|1||Socket inner face, fits into hard socket.|
|2||Hard plastic coupled with socks|
|3||Hard plastic coupled with gel|
|4||Hard plastic w/ suction skin fit|
|5||Flexible inner liner coupled with socks|
|6||Flexible inner liner coupled with Gel|
|7||Flexible inner liner w/ suction skin fit|
Holds prosthetic to body
|1||Silesian Belt : usually belt raps around patients waist attached to prosthesis|
|2||Gel liner w/ pin or Lanyard strap : usually Silicone or Urethane rolls on skin holding by a suction to the skin, then a mechanical lock occurs between the exterior pin or strap on liner to the socket.|
|3||Gel liner w/ Suction Ring & valve : usually Silicone or Urethane rolls on skin holding by a suction to the skin, ring will evacuate air out of socket via one way valve.|
|4||Pelvic Belt w/ Hip Band : Usually coupled with a metal band that sits on hip attached to leather belt that goes around waist.|
|5||TES Belt : Removable Neoprene belt pulled onto socket raps around waist.|
|6||Total Suction : This type permits air to be evacuated from socket via a valve, socket is held to residual limb by outside air pressure, often belts and straps can be eliminated.|
Can come in many shapes and sizes.
They are broken down into two types:
Single Axis : Single knee joint, also can be constructed with Stance control (the ability of the knee to lock preventing it from buckling when weight is applied on it).
Polycentric : More than one knee joint, primarily used on Long Above Knee amputations for a lower profile design.
Single Axis & Polycentric knee types :
|1||Manual Lock : Will stay locked until manually released.|
|2||Constant Friction : Knee joint has capability to free swing, speed is set by a friction screw not a variable speed but a constant speed determined by amount of friction applied|
|3||Fluid Control : Swing of knee controlled by a Hydraulic (fluid) or Pneumatic (air) unit giving prosthesis Cadence Variability (ability to change speeds according to amputees activity)|
|4||Microprocessor Controlled : Usually a fluid controlled knee coupled with a microprocessor to control the rate the fluid reacts depended on the step of the patient. Usually has stance (knee can lock up) capabilities controlled by the microprocessor unit in knee.|
The rigid shaft or tube below prosthetic knee controls the length and attaches knee to the foot.
Below are general types with a brief description and function.
|1||SACH : Hard internal keel that has no movement with firm a foam cosmesis.|
|2||Elastic or Flexible Keel : Simulates ankle motion with out true ankle joint.|
|3||Single Axis Foot : Ankle motion in one plane going forward and backward, can be constructed with various keel types.|
|4||Multi-axial Foot : Ankle motion in more than one plane, can be constructed with various keel types.|
|5||Energy Responsive Foot : Keel is made of composite materials that when loaded by body weight can give return from heel strike to toe off. A good example is how a diving board reacts when someone jumps on, it will load then spring off. This type of foot can be constructed to simulate ankle motion without a true ankle joint or it can be incorporated into a Single Axis or Multi-axial Foot.|