Over time, performance-diminishing changes occur in all modalities. Un-serviced or improperly-serviced equipment can create undesirable conditions:
Faulty power cords and plugs can produce hazardous electrical conditions
Ultrasound power levels can increase beyond safe levels
Dynamometry instruments may provide faulty FCE data
Faulty electrotherapy cables can produce dangerous electrical outputs
Life-saving GFCI outlets can fail, creating the potential for a catastrophic event