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  • Pneumatic tourniquets that include an electrically powered compressed air pump that are designed to circumferentially constrict/compress an extremity for a limited period of time by applying a precise amount of pressure using an automated 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 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 one or more inflatable cuffs and an electric-powered control unit with a compressed air pump; usually integral manual bulbs are also included in the control unit for use in case of power failures. The tourniquets also include controls, regulators, monitors for the applied pressure, and alarms for abnormal conditions. Computerized automated tourniquets can perform self-calibration checks and display elapsed inflation time. Automated electric-powered 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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