Emergency tourniquet
Tourniquet Strap width ( cm ) Mechanism Note
SAM XT Tourniquet 3.7 Windlass and Buckle Buckle sets with correct force ; windlass finishes pressure
Combat Application Tourniquet ( CAT ) 3.8 Windlass Stick and strap inside outer sleeve
Emergency & Military Tourniquet ( EMT ) 9.1 Pneumatic Hand pump and inflatable bladder
K Tactical Tourniquet ( K ) 3.8 Clamp Modified wood clamp
Smart Tactical Application Tourniquet ( S.T.A.T . ) 2.5 Ratchet Strap with ratcheting mechanism
Last Resort Tourniquet ( LRT ) 5.1 Ratchet Strap with ratcheting mechanism
London Bridge Tourniquet ( LBT ) 2.4 Ratchet Strap with ratcheting mechanism
Mechanical Advantage Tourniquet ( MAT ) 3.8 Block and tackle Pulleys on outer frame
One-Handed Tourniquet ( OHT ) 2.8 Elastic Parallel bungee cords and clamp
Self-Applied Tourniquet System ( SATS ) 3.8 Cam Cantilever system
Special Operations Forces Tactical Tourniquet ( SOFTT ) 3.7 Windlass Stick and strap
Tourniquet design -- Mechanical advantage
Emergency tourniquets are cuff-like devices designed to stop severe traumatic bleeding before or during transport to a care facility. They are wrapped around the limb, proximal to the site of trauma, and tightened until all blood vessels underneath are occluded. The design and construction of emergency tourniquets allows quick application by first aid responders or the injured persons themselves. Correct use of tourniquet devices have been shown to save lives under austere conditions with comparatively low risk of injury. In field trials, prompt application of emergency tourniquets before the patient goes into shock are associated with higher survival rates than any other scenario where tourniquets were used later or not at all.