When to use a tourniquet vs direct pressure, step-by-step application, wound packing for junctional wounds, common errors, and post-application care.
Uncontrolled bleeding is the leading cause of preventable death from trauma. A tourniquet or wound packing applied correctly in the first few minutes can save a life before emergency services arrive.
⚠️ Do not hesitate to apply a tourniquet to save a life. The risk of limb loss from a properly applied tourniquet is far lower than the risk of death from uncontrolled bleeding.
| Situation | Correct Intervention |
|---|---|
| Bleeding from arm or leg — soaking through dressings | Tourniquet |
| Bleeding from arm or leg — moderate, not yet life-threatening | Direct pressure first; tourniquet if soaking through |
| Wound in groin, armpit, or neck (junctional) | Wound packing + pressure — tourniquet cannot be placed here |
| Wound on torso/chest/abdomen | Direct pressure only — no tourniquet, no packing |
| Amputation | Tourniquet immediately — do not attempt direct pressure first |
A commercial tourniquet (CAT, SOFTT-W) is ideal. An improvised tourniquet from a belt or strip of fabric works if nothing else is available.
| Step | Action |
|---|---|
| 1. Expose the wound | Cut away clothing — you must see the injury |
| 2. Position | Apply 5–7 cm (2–3 inches) above the wound — never over a joint |
| 3. Route the strap | Thread through the buckle and pull tight |
| 4. Tighten with windlass | Twist the rod until bleeding stops — this will be painful; continue until bleeding stops |
| 5. Secure the windlass | Lock into the clip; do not allow it to unwind |
| 6. Note the time | Write the time of application on the tourniquet or the casualty's forehead with a marker |
| 7. Do not cover | Leave the tourniquet visible at all times |
| 8. Do not remove | Only a physician removes a tourniquet — once applied, leave it on |
The tourniquet is working when: Active bleeding has stopped. If bleeding continues, tighten further or apply a second tourniquet immediately above the first.
Use for deep wounds in areas where a tourniquet cannot be placed: neck, groin, armpit, shoulder.
| Step | Action |
|---|---|
| 1. Apply gloves if available | Protect yourself from bloodborne pathogens |
| 2. Pack the wound | Push haemostatic gauze (or any clean cloth) firmly into the wound cavity — do not just cover the surface |
| 3. Pack tightly | Use your fingers to push gauze deep into the wound, filling the cavity completely |
| 4. Apply direct pressure | Lean your full body weight onto the packed wound — maintain for a minimum of 3 minutes (5 minutes for haemostatic gauze) |
| 5. Do not lift to check | Lifting releases the pressure and disrupts clotting |
| 6. If bleeding soaks through | Add more gauze on top; do not remove original packing |
If no commercial tourniquet is available:
| Error | Consequence | Correct Approach |
|---|---|---|
| Too loose | Causes venous tourniquet — worsens bleeding | Tighten until bleeding stops entirely |
| Applied over a joint | Ineffective and potentially harmful | Apply mid-limb, 5–7 cm above wound |
| Narrow material | Cuts skin; distributes pressure poorly | Minimum 4 cm wide |
| Covering with bandage | Prevents monitoring | Leave visible at all times |
| Removing in the field | Re-bleeding; reversal of clot | Leave on — hospital removal only |
| Packing the surface only | Blood continues beneath | Pack deep into the wound cavity |
| Scenario | Action |
|---|---|
| Limb bleeding, soaking through | Tourniquet — 5–7 cm above wound; tighten until bleeding stops; note time |
| Groin, armpit, or neck wound | Pack wound deep with gauze; apply firm continuous pressure 3–5 min |
| Tourniquet not stopping bleed | Apply second tourniquet directly above first |
| No commercial tourniquet | Belt/torn strip ≥4 cm wide; windlass technique |
| Remove tourniquet? | Never in the field — hospital only |
| How long can tourniquet stay on? | Up to 2 hours safely; beyond that, risk of damage — but life > limb |
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