I recently had opportunity to recommend the Neti pot to TamaraK as a low impact method for her to alleviate her sinus problems (you'll have to scroll well down the comments). Despite her subsequent confession of sissytude (a condition shared by a surprising - to me - number of others) regarding the general sanctity of nasal passages, I can't help wondering how effective such a device might be as a delivery mechanism for nano-scale medicines?
Granted, only a certain amount of any individual dose would remain inside the sinus cavity (the rest being flushed out along with everything else), but this should allow for a more gradual introduction of the material into the system via absorption through the sinus tissues. Should a more rapid introduction be desired, then an inhaler or direct transfusion would still be viable - if more invasive - options.
Regarding the still-mythical respirocytes hypothesised by Ray Kurzweil, and unlike Phil Bowermaster apparently, I certainly do want the capabilities he mentions whether or not I have any particular "need" for them. I regard such choices as being analogous to the choice provided to US citizens by our constitution's 2nd amendment. The decision to exercise the right isn't predicated on any degree of need; any effort now or in future to restrict such medical options as Kurzweil's respirocytes ought to be as strongly resisted as are infringements on our right to firearms. We are each free to elect not to exercise the right, but no-one should have the blanket authority to impose when or if we may make such a choice for ourselves.