Abstract

Imagine your body is populated by billions of respirocytes capable of delivering 236 times more oxygen than your natural red blood cells. These mechanical, micron sized spheres are appropriately programmed by your physician to meet your personal requirements, be it the treatment of anemia or the enhancement of your physical abilities. Robert Freitas’ vision of such artificial blood cells comprised of nanometer-scale components was published in 1998 in a peer-reviewed medical journal, and was the first medical nanorobot design paper to be published.The fact that this proposal for a future blood substitute was accepted as worthy of publication in a scientific journal, despite the inventor's explicit statement that such a device could not be built at the time, clouds the criteria upon which an informed opinion about the feasibility of such devices could be formed. In that respect, the idea of respirocytes formidably testifies to the current “blurring of fact and fiction” occurring in the field of nanotechnology.