Pin lock:

A liner with an attached pin is donned on the limb. The prosthesis contains a lock, and upon donning, the pin clicks into the prosthesis lock. The prosthesis is released with a button.

Lanyard:

A liner with an attached lanyard is donned on the limb. The lanyard is pushed through the bottom of the socket and secured to a loop on the outside of the prosthesis.

Suction:

Two options are available for a suction socket.

• In the first option, a cushion liner is provided to go directly on the limb. After donning the socket, a knee sleeve that is attached to the top of the socket is pulled up to touch the skin. A one-way valve allows air to expel while walking, creating suction in the socket.
• In the second option, a liner is donned followed by a seal. Air is expelled from the socket through a one-way valve while donning. The prosthesis is then suspended only on the bottom section (“distal end”) of the limb.

Vacuum:

This type of suspension is similar to suction sockets in its construction. The difference is that a pump is actively pulling air out of the socket, thus elevating the suction to higher levels.