In developing a successful medical device design, the most important step is identifying the true problem that needs to be solved. This is not nearly as obvious as it seems. Many devices and products have been designed, only to fail in the market not because they were designed poorly, but because they failed to address the real problem for the user.
A good way of identifying design opportunities is to uncover where the user is experiencing friction. If there is any friction that is slowing the process or is forcing the user to struggle, that is where design efforts need to focus.