Abstract: A pneumatic tourniquet has a constricting device that comprises a rocker, such that when the rocker is angularly displaced by contact with a wounded limb, a clamping force is applied by a rocker surface and a clamping edge onto a sealing element to prevent flow of the pressurized gas from an interposed inflated strap to a free end, causing the strap free end to be considerably thinner than the main strap section. In one embodiment, a gas flow control assembly comprises a casing containing a force transmitting element and a gas cartridge; and a pivotable activation handle, wherein, upon pivoted displacement of the activation handle, pressurized gas is caused to be discharged from the gas cartridge and flow to an interior of the strap. In other embodiments, the pneumatic tourniquet comprises one or more of a flow control unit, a manual pressure release initiator, and a puncture mitigating connection section.