Disclosed is a device for exsanguinating a portion of an extremity, the device comprising a torus having a variable circumferential diameter, the torus configured to encircle an extremity portion and apply exsanguination pressure thereto, and a transducer operatively associated with the torus, the transducer, while the torus is encircling the extremity portion, being configured to control at least one of a diameter of the variable circumferential diameter, a tension in the torus and a pressure applied by the torus.
