I do know the difference betwen active and passive tags , it is hard to express toungue in cheek whilst typing. But if a passive tag can be made this small why can an active one not be made a lot smaller and lower powered? Obviously they will be larger than passive tags but they do seem excessivly large.
These current large active tags would not fit well on an ambulatory syringe driver which by its nature travels around the place and gets "stored safely" in drawers.
It is this types of equipment that would benefit from tagging not large patient monitors etc.