Tourniquets have proven to be an indispensable tool in cases of severe life threatening bleeding from an extremity wound. Tourniquets are most effective at saving lives due to massive hemorrhage if applied prior to the onset of shock. If direct pressure fails to control severe bleeding the decision to apply a tourniquet should be made quickly. In this Acme Minute, we show you how to apply a CAT tourniquet. As always, we recommend you check your local protocols to ensure there are no conflicts with the information provided during this Acme minute. This information is catered towards EMS professionals: EMTs, Paramedics and Fire Fighters. Check out www.AmericanCME.com for free online continuing medical education.