How to Choose a Tourniquet
A tourniquet is a mechanical clamp on arterial flow. To work, it has to generate enough circumferential pressure to occlude the artery beneath the muscle — which is why width and a true mechanical advantage matter more than how tight you think you've pulled it. A narrow strap or an improvised band rarely reaches occlusion pressure and can worsen bleeding by trapping venous return while leaving arterial inflow open.
Limb vs. junctional
| Type | Mechanism | Use |
|---|
| Limb — windlass | Rod twisted to tighten a wide strap | Arm and leg hemorrhage; the field standard |
| Limb — ratchet | Ratcheting buckle drives incremental pressure | Larger limbs, gloved or low-dexterity application |
| Junctional | Targeted compression at the groin or axilla | Bleeding too proximal for a limb tourniquet |
Application doctrine
- High and tight — place on the proximal third of the limb, never over a joint, when the bleed is catastrophic or the site is obscured.
- Tighten to no bleeding and no distal pulse — partial pressure that stops oozing but not the artery increases blood loss.
- Second tourniquet if needed — place side-by-side and proximal to the first if one does not control the bleed.
- Time-mark it — write the time of application; conversion is a later, protocol-driven decision.
Standardizing a program? Issue one proven tourniquet model and train to it — mixed inventories cost seconds under stress. Anchor selection and loadout with the
trauma-response brief.
Why "CoTCCC-recommended" matters
The Committee on Tactical Combat Casualty Care evaluates tourniquets against survivability data and publishes a recommended list. A recommendation reflects field and laboratory performance — it is not an FDA approval or certification. Choosing from that list, and avoiding narrow improvised bands, is the single highest-yield decision in a bleeding-control loadout.
Frequently Asked Questions
What is the best type of tourniquet?
For limb hemorrhage, a CoTCCC-recommended windlass or ratchet tourniquet with a wide strap is the field standard. Width and a true mechanical advantage are what reach arterial occlusion; narrow or improvised bands often fail to stop arterial flow.
Where do you place a tourniquet?
Place it high and tight on the proximal third of the limb when bleeding is catastrophic or the wound site is unclear, and never directly over a joint. Tighten until bleeding stops and the distal pulse is gone.
Can you leave a tourniquet on too long?
Tourniquets can remain in place for a meaningful window; the priority is stopping the bleed. Always mark the application time and leave conversion or removal to protocol and medical direction, not guesswork.
Do I need a junctional tourniquet?
A junctional tourniquet addresses bleeding at the groin or axilla that is too proximal for a limb device. Agencies covering blast, gunshot, or high-energy trauma should consider one; many civilian kits do not require it.
Are these tourniquets CoTCCC approved?
CoTCCC issues recommendations, not approvals or certifications. The committee evaluates devices against survivability data and publishes a recommended list; this collection prioritizes those recommended designs.
Related collections
