A powered version of the<unk>  is available as well. By using the electrical track system a person can be saved or moved up and down the stairs by a single operator. Like a mobility problem solver. Enhanced models can have chairs that require two-person operation; these are more commonly used in ambulances. Lifting handles are used for descent and ascent of stairs. Caterpillar tracks are also used on the stairs.
Escape chair
Bárány chair
Scoop stretcher
Wartenberg wheel
Hug machine
Gait belt
Mind machine
Baby walker