It's being hailed as one of the greatest medical breakthroughs in recent years. It's a microparticle that can be injected into a bloodstream and can quickly oxygenate a patient's blood.
This will work even if the ability to breathe has been restricted or even cut off entirely. The microparticles so far can keep an object alive for up to 30 minutes after respiratory failure. This is enough time to avoid risking a heart attack or permanent brain injury when oxygen is restricted.
The microparticles have a ton of potential uses in the future. Obviously the medical use is great. Ambulances and emergency care people can have it ready for when they're needed. The military will be able to use it for missions when they needed to be underwater for a while.
Imagine you're trapped in a sinking ship and you are drowning. You can inject yourself to give you time to get out. Divers can inject themselves to protect against suit failure.