<html><head></head><body>Not there yet, even by a longshot. But still looks eminently useful:<div><br></div><div>http://www.sciencedaily.com/releases/2012/06/120627142512.htm</div><div>http://stm.sciencemag.org/content/4/140/140ra88.full.pdf</div><div><br></div><div><div>"We have developed an injectable foam suspension containing self-assembling, lipid-based microparticles encapsulating</div><div>a core of pure oxygen gas for intravenous injection. Prototype suspensions were manufactured to</div><div>contain between 50 and 90 ml of oxygen gas per deciliter of suspension. Particle size was polydisperse, with a</div><div>mean particle diameter between 2 and 4 mm. When mixed with human blood ex vivo, oxygen transfer from 70</div><div>volume % microparticles was complete within 4 s. When the microparticles were infused by intravenous</div><div>injection into hypoxemic rabbits, arterial saturations increased within seconds to near-normal levels; this</div><div>was followed by a decrease in oxygen tensions after stopping the infusions. The particles were also infused</div><div>into rabbits undergoing 15 min of complete tracheal occlusion. Oxygen microparticles significantly decreased</div><div>the degree of hypoxemia in these rabbits, and the incidence of cardiac arrest and organ injury was reduced</div><div>compared to controls. The ability to administer oxygen and other gases directly to the bloodstream may represent</div><div>a technique for short-term rescue of profoundly hypoxemic patients, to selectively augment oxygen delivery</div><div>to at-risk organs, or for novel diagnostic techniques. Furthermore, the ability to titrate gas infusions rapidly</div><div>may minimize oxygen-related toxicity."</div><br>Anders Sandberg,
Future of Humanity Institute
Philosophy Faculty of Oxford University</div></body></html>