Patient support apparatus with adaptive user interface

A patient support apparatus for supporting a patient, said patient support apparatus comprising:

• a litter comprising a patient support surface to support the patient, with said litter being useable in an undocked mobility mode and a docked mode;
• a base configured to support said litter;
• a track driving device coupled to said litter to provide mobility to said litter when said litter is removed from said base, said track driving device comprising a continuous track configured to engage stairs and supported by a frame member, and a wheel coupled to said frame member and configured to rotationally engage a floor surface, wherein said track driving device is configured to articulate relative to the litter into position for operation of said patient support apparatus
• a support frame coupled to said litter and configured to articulate relative to said litter, wherein said litter is movable between a raised position wherein said track driving device and said support frame are articulated away from the patient support surface and the patient support surface is spaced from the floor surface, and a lowered position wherein said track driving device and said support frame are articulated substantially parallel with the patient support surface and the patient support surface is spaced from the floor surface at a minimum height therefrom;
• a state detection device adapted to detect operation between said docked mode and said undocked mobility mode and to generate a state signal;
• a user interface to generate an input signal in response to actuation by a user;
• a first powered device selectively operable to perform a first function associated with said litter, and a second powered device selectively operable to perform a second function associated with said litter;
• a controller coupled to said state detection device, said user interface, and said first and second powered devices, with said controller configured to receive said input signal and said state signal and to generate an output signal based on said input signal and said state signal such that said user interface has a first functionality to operate at least one of said first and second powered devices to perform said first function upon actuation of said user interface by the user when said litter is in said undocked mobility mode and a second functionality different from said first functionality to operate at least one of said first and second powered devices to perform said second function upon actuation of said user interface by the user when said litter is in said docked mode.