One of the reasons products fail is because they’re designed as objects in isolation, without considering the context in which the object will be used. Design should be done in consideration of the whole system in which the object exists. The designer should also focus not on the object as much as what the object allows the user to accomplish. This is the emotional factor that drives everything we do, much more so than intellect and reason. You buy something not only because of what it can do for you, but because of the way it will make you feel about yourself. This is just as true for medical device design as it is for consumer products.