A self-inflating tourniquet that combines a pneumatic cuff with a life jacket inflator.

The inflator has an integral pressure regulator reducing CO2 bottle pressure to a constant 7psi.

Once wrapped around the bleeding limb the toggle is pulled and the cuff automatically inflates, cutting off blood flow. The remaining CO2 in the gas cylinder maintains pressure even if the cuff has suffered minor damage.

It is far faster than all existing systems and should lead to many lives being saved.