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  • Tourniquets designed to circumferentially constrict/compress an extremity for a limited period of time by applying a precise amount of pressure using a gas-inflated cuff. The pressure is applied upon the limb surface and underlying tissues using the cuff; pressure is then transferred to the blood vessels causing a temporary occlusion. The pressure applied should be at least equal or higher than the minimum required to occlude the blood flow (i.e., limb occlusion pressure [LOP]). These tourniquets typically include an inflatable cuff, a compressed gas source, and tubes. Manual devices may use an integral gas cartridge or a manual pump as compressed air source while automated tourniquets include a control unit that supplies the compressed gas from a central supply system, a small gas container (e.g., a cylinder), or from an integral electric pump. Pneumatic tourniquets are used mainly during surgical procedures on the extremities enabling surgeons to perform delicate procedures in bloodless operative fields.
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