MARCH Module 01 of 05
M — Massive Hemorrhage Control
Extremity hemorrhage is the leading cause of preventable death from traumatic injury — and the one a prepared responder can stop with two hands and the right equipment. This module covers how to recognize bleeding that can kill, how to control it at your training level, and how to make sure your intervention is actually working.
The Physiology
Why M Comes First
MARCH orders its letters by how fast each threat kills. Massive hemorrhage is at the front of the line because the math is brutal.
Minutes To Lethal
A casualty can lose a lethal volume of blood from a femoral artery injury in under five minutes — long before any airway or breathing problem becomes fatal.
Total Blood Volume
An adult carries roughly five liters. Losing more than about a third of it pushes a casualty deep into shock where the body can no longer compensate.
Preventable Death
Extremity hemorrhage is consistently identified as the leading cause of preventable battlefield death — and the most survivable with immediate action.
Minutes To Control
A properly applied commercial tourniquet can control most limb bleeding in under two minutes. Speed of first response — not hospital care — is what changes the outcome.
Recognize — What Counts As Life-Threatening Bleeding?
Not every cut needs a tourniquet. Train your eyes for the signs that separate a bad bleed from a lethal one:
- Blood rapidly pooling or spreading on the ground
- Continuous heavy bleeding that is not slowing
- Pulsatile or squirting bleeding — an arterial pattern
- Clothing or bandages becoming saturated quickly
- Traumatic amputation or near-amputation of a limb
- Bleeding that continues despite firm direct pressure
- Significant prior blood loss with signs of shock — confusion, pallor, weak pulses
Where is it bleeding from?
- Extremity (arm or leg) — the anatomy a tourniquet can reach.
- Junctional (groin, axilla, base of neck) — where limbs meet the torso; tourniquets cannot reach. Wound packing plus sustained pressure is the standard first response, with specialized junctional devices at higher training levels.
- Compressible torso or scalp wound — pack the source and hold pressure.
- Non-compressible / internal — you cannot tourniquet internal bleeding. Recognize it, keep the casualty warm, and expedite higher-level care.
Find the bleeding with your hands, not your eyes. In low light, through soaked clothing, under body armor — a systematic blood sweep finds what a glance misses.
Act — Controlling The Bleed At Your Level
Hasty vs. deliberate tourniquet placement
When you cannot safely expose or identify the wound — under fire, in traffic, during extrication — apply high and tight on the limb, over clothing, and move. Speed beats precision while the threat is active.
Once the wound can be exposed: place the tourniquet directly on the skin approximately 2–3 inches above the most proximal wound edge, avoiding joints, cinch it until bleeding stops, and reassess effectiveness. Current TCCC guidance emphasizes mandatory tourniquet reassessment.
The escalation ladder
- Direct pressure — firm, focused, with a gloved hand and a bulky dressing. First move for nearly every bleed.
- Commercial tourniquet — wide, windlass-style, applied per manufacturer technique. The fastest control for most limb hemorrhage.
- Wound packing — for junctional and deep compressible wounds: fill the cavity with hemostatic or plain gauze at the source, then sustained pressure.
- Pressure dressing — secures control after packing or for wounds that do not need a tourniquet.
- Second tourniquet — placed proximal to the first when a single tourniquet does not control hemorrhage.
A tourniquet that hurts is not necessarily a bad tourniquet. A tourniquet that doesn't stop life-threatening bleeding is a bad tourniquet. If the first one fails, apply a second — do not spend ten minutes re-tightening the first.
Check — How Do I Know It Worked?
- The bleeding stops. No ongoing ooze, no expanding pool, no saturating dressing.
- For trained providers: assess distal pulses and distal perfusion according to protocol.
- Document the application time — write it on the tourniquet, the casualty's forehead, or your report. Receiving clinicians need it.
- Reassess on every loop cycle. Current TCCC guidance emphasizes mandatory tourniquet reassessment and conversion when appropriate.
- Keep the tourniquet visible. A tourniquet hidden under clothing or blankets gets missed at handoff.
Don't — The Failure Patterns
- Tourniquet applied too loose — it occludes veins but not arteries, and bleeding worsens.
- Placed below the wound or distal to the bleeding source.
- Placed directly over a joint, where it cannot compress vessels.
- Never fully tightened — the strap sits on the limb without real circumferential pressure.
- Failing to escalate to a second tourniquet when the first does not control hemorrhage.
- Hiding the tourniquet under clothing or blankets, so reassessment and handoff miss it.
- No documented application time passed to the receiving crew.
- Set-and-forget: applying once and never reassessing, while the casualty slowly re-bleeds.
What This Looks Like At Your Level
Switch roles to compare scope
Civilian / Prepared Citizen
Your job is simple on purpose: find life-threatening bleeding, stop it, call 911, and keep it stopped until EMS arrives. Properly trained civilians can — and do — save lives with direct pressure and a commercial tourniquet.
Direct pressure · Commercial tourniquet · Wound packing · Pressure dressing · Reassessment
Law Enforcement / First Responder
Carry it where your hands can reach it under duty gear, not in the trunk. Under threat, hasty and high; behind cover, deliberate. You are frequently the first trained responder on scene — minutes matter more than technique points.
Self-aid / buddy aid · Hasty vs deliberate TQ · Application over clothing during direct threat · Blood sweep · Casualty handoff · Documentation
Medic / EMS / Clinician
You add the full resuscitation stack behind the tourniquet: reassessment and conversion strategy, junctional devices, hemostatic agents, TXA and calcium where applicable, damage-control resuscitation, and physiologic endpoints that tell you whether the casualty is winning.
Junctional strategies · Hemostatic agents · TQ conversion · Shock assessment · IV/IO · Blood products · TXA · Damage-control resuscitation
Module Self-Check
Test Your M Knowledge
1. A casualty is bleeding heavily from the thigh. Before anything else, what do you do?
2. Under active threat, you apply a tourniquet high and tight over clothing. Is the job done?
3. The first tourniquet is on but bleeding continues. Now what?
4. Bleeding from the groin that direct pressure alone cannot control. Your move?
5. The bleeding stopped, the tourniquet is holding, casualty is talking. Stable?
Equipment
Build Your M Capability
The tools that control massive hemorrhage — live from the store's tourniquet and hemorrhage-control catalog.
M2 Tourniquet mit Ratsche - 1,5"
4.7 / 5 · 9 reviews
M2 Tourniquet mit Ratsche – 2 Zoll breit
4.8 / 5 · 17 reviews
TX3 3" Ratschen-Tourniquet - 60" lang
Rapid Access Pouch — Bleeding Control Kit w/ TMT
Continue The Sequence
Next MARCH Modules
TCCC content reviewed against CoTCCC Guidelines — 1 May 2026 · Civilian / LE content reviewed against current C-TECC guidance
Guidelines evolve. Agency protocols and scope of practice control. Educational alignment — not a certification.