7.1 TCCC Phases of Care: Care Under Fire, Tactical Field Care, and TACEVAC

TCCC Phases of Care: Care Under Fire, Tactical Field Care, and TACEVAC

Core Doctrine: Tactical Combat Casualty Care (TCCC) in the United States Army is governed by TC 4-02.1 (First Aid), ATP 4-02.83 (Tactical Combat Casualty Care), and evidence-based clinical protocols established by the Committee on Tactical Combat Casualty Care (CoTCCC). TCCC fundamentally departs from civilian emergency medical protocols by recognizing that tactical success and effective medical management are inextricably linked on the modern battlefield.

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1. Doctrinal Foundations and the Tactical Paradigm Shift

Historically, military first aid mirrored civilian emergency medical services (EMS) doctrines, centered on the rigid "ABCs" (Airway, Breathing, Circulation) framework and an assumption of scene safety. In pre-hospital civilian environments, paramedics arrive at a secured scene, establish local security via law enforcement, and execute uninterrupted diagnostic and therapeutic measures.

On the modern battlefield, however, civilian medical protocols proved fatal. In Vietnam and early operations in Mogadishu, casualties and would-be rescuers frequently sustained mortal wounds because medical care took precedence over the ongoing firefight. Battlefield data compiled through the Wound Data and Munitions Effectiveness Team (WDMET) study and subsequent conflicts in Iraq and Afghanistan demonstrated that bad medicine executed in a high-threat environment yields catastrophic tactical and medical outcomes.

TCCC redefines pre-hospital trauma care by introducing three overarching operational goals:

1. Treat the casualty: Provide life-saving interventions for combat-induced trauma.
2. Prevent additional casualties: Prevent the provider, other squad members, or the casualty from sustaining further wounds.
3. Complete the mission: Subordinate individual medical care to the unit's tactical mission when the tactical scenario demands combat power.

Board Principle: The single most effective battlefield medical intervention during hostile contact is fire superiority. Suppressing enemy fire stops incoming rounds, protects the casualty, and preserves the squad's combat power.

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2. Leading Causes of Preventable Battlefield Death

A central knowledge requirement for soldiers appearing before a promotion board is articulating the three leading causes of preventable death on the battlefield. Historical casualty analyses demonstrate that approximately 90% of all combat deaths occur prior to a casualty reaching a Role 2 or Role 3 Medical Treatment Facility (MTF). Among those casualties whose injuries were survivable (preventable deaths), three pathophysiological conditions account for nearly 100% of fatalities:

   PREVENTABLE BATTLEFIELD DEATHS (HISTORICAL EPIDEMIOLOGY)
   ─────────────────────────────────────────────────────────────────
   Cause of Death                         Share of Preventable Loss
   ─────────────────────────────────────────────────────────────────
   1. Severe Extremity Hemorrhage                     60%
   2. Tension Pneumothorax                            33%
   3. Airway Obstruction / Compromise                  6%
   ─────────────────────────────────────────────────────────────────
   Total Accounted For:                               99%

1. Severe Extremity Hemorrhage (60%)

Massive arterial bleeding from severed femoral, brachial, or popliteal vessels represents the leading cause of preventable combat death. In high-pressure arterial injuries, a soldier can bleed to death (exsanguinate) in as little as 60 to 90 seconds. Rapid application of a CoTCCC-recommended limb tourniquet completely arrests arterial blood loss and transforms an otherwise fatal trauma into a stable injury.

2. Tension Pneumothorax (33%)

A tension pneumothorax develops when penetrating thoracic trauma allows atmospheric air to enter the pleural space through a one-way defect in the chest wall or visceral pleura. As positive pressure accumulates within the hemithorax, the affected lung completely collapses, shifting the mediastinum, compressing the superior and inferior vena cava, and precipitating sudden cardiovascular collapse (obstructive shock). Decompressing the pleural space with a large-bore needle restores venous return and prevents death.

3. Airway Obstruction (6%)

Airway compromise results primarily from an altered level of consciousness (flaccid tongue collapsing over the posterior pharynx), maxillofacial blast trauma, or severe soft-tissue bleeding into the oral cavity. Simple non-invasive positioning maneuvers, such as the modified jaw-thrust and lateral recumbent recovery position, combined with a nasopharyngeal airway (NPA), reliably salvage the vast majority of airway-compromised casualties.

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3. The Three Distinct Phases of TCCC

TCCC organizes all medical interventions into three distinct, sequential phases defined strictly by the tactical environment and the presence or absence of effective enemy fire.

   ┌───────────────────────────────────────────────────────────────┐
   │                   PHASES OF TCCC DOCTRINE                     │
   └───────────────────────────────┬───────────────────────────────┘
                                   │
          ┌────────────────────────┼────────────────────────┐
          │                        │                        │
          ▼                        ▼                        ▼
   ┌──────────────┐         ┌──────────────┐         ┌──────────────┐
   │ CARE UNDER   │         │ TACTICAL     │         │ TACTICAL     │
   │ FIRE (CUF)   │         │ FIELD CARE   │         │ EVACUATION   │
   │              │         │ (TFC)        │         │ (TACEVAC)    │
   └──────┬───────┘         └──────┬───────┘         └──────┬───────┘
          │                        │                        │
   • Effective hostile fire • Behind cover/no fire   • En-route to MTF
   • Fire superiority first • MARCH PAWS protocol    • MEDEVAC vs CASEVAC
   • Tourniquet only        • Deliberate hemostasis  • Packaging & vitals
   • Drags and carries      • Airway & chest seals   • DD Form 1380

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4. Phase 1: Care Under Fire (CUF)

Care Under Fire (CUF) is the care rendered by the first responder or casualty while still under effective hostile fire. In this phase, the tactical situation takes absolute precedence over clinical intervention.

Tactical Directives and Fire Superiority

When a soldier sustains a wound during an active firefight, the first responder must:

• Return effective fire: Maintain fire superiority and take ballistic cover. The primary mission is to suppress the enemy threat; abandoning a weapon to render medical aid while taking fire increases the probability of sustaining additional casualties.
• Direct the casualty: If the casualty remains conscious and capable, command them to return fire, find cover, and perform self-aid by applying their own tourniquet from their Individual First Aid Kit (IFAK).
• Communicate with leadership: Alert team and squad leaders to the casualty's location and status without compromising unit security.

Permissible Medical Interventions in CUF

Medical care during Care Under Fire is strictly limited to one single intervention:

• Immediate application of a CoTCCC-approved limb tourniquet to control life-threatening extremity hemorrhage.
• Application Standard: Applied "high and tight" over the casualty's uniform, proximal to the bleeding site on the injured extremity. In CUF, the responder does not take time to expose the wound, remove clothing, or search for exact anatomical margins due to imminent ballistic threat.
• CoTCCC-Approved Tourniquets: Standard issue devices include the Combat Application Tourniquet (CAT) Generation 7 and the Special Operations Forces Tactical Tourniquet - Wide (SOFTT-W).
• Prohibited Interventions in CUF: Airway opening maneuvers, wound packing, hemostatic gauze application, chest seal placement, splinting, and needle chest decompressions are strictly forbidden during CUF. Attempting these procedures under hostile fire unnecessarily exposes the rescuer to fatal fire.

Movement of Casualties to Cover

If a casualty is unconscious, incapacitated, or unable to move, the rescuer must evaluate whether an extraction attempt is tactically viable. When authorized by the tactical leader, movement techniques must minimize exposure:

• One-Person Drag: Rescuer stays low, grips the casualty's tactical vest drag handle or harness, and drags backwards toward cover while maintaining low silhouette.
• Two-Person Drag: Faster and less fatiguing; two rescuers grasp the casualty's armor or drag straps and rapidly displace to cover.
• Hawes Carry / Fireman's Carry: Used only when deep defilade or obstacles prevent dragging; carries expose both rescuer and casualty to high-angle ballistic threats and should be avoided in flat terrain.
• Tactical Drag Straps / Webbing: Enables rapid extraction using pre-rigged tubular nylon webbing attached to the casualty's carabiner or harness.

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5. Phase 2: Tactical Field Care (TFC)

Tactical Field Care (TFC) is the care rendered once the casualty and provider are no longer under effective hostile fire. This transition occurs when the squad has eliminated or suppressed the threat, the casualty has been dragged into hard cover or defilade, or the unit has maneuvered out of the engagement area.

Tactical Field Care Priorities

Although hostile rounds are no longer impacting the immediate location, the tactical situation remains dynamic and volatile. TFC priorities include:

1. Establish a security perimeter: Ensure 360-degree security before dedicating soldiers to hands-on medical tasks.
2. Triage casualties: If multiple casualties exist, the senior soldier or combat medic establishes tactical triage (Immediate, Delayed, Minimal, Expectant).
3. Execute the MARCH PAWS Algorithm: A systematic, prioritized head-to-toe assessment framework designed specifically for combat trauma.

Systematic Progression: MARCH PAWS Overview

In TFC, the rescuer works methodically through the MARCH PAWS sequence:

• M — Massive Hemorrhage: Assess and control all severe bleeding; re-evaluate tourniquets applied during CUF.
• A — Airway: Assess patency; clear obstructions; place a nasopharyngeal airway (NPA) or position in recovery position.
• R — Respiration: Treat open chest wounds with vented chest seals; perform needle chest decompression for tension pneumothorax.
• C — Circulation: Palpate pulses; stabilize pelvic fractures with a SAM Pelvic Sling; reassess all interventions.
• H — Hypothermia Prevention: Insulate the casualty from the ground; apply active and passive warming blankets.
• P — Pain: Administer Combat Wound Medication Pack (CWMP) or coordinate analgesic administration.
• A — Antibiotics: Administer oral moxifloxacin or IV antibiotics to prevent wound infection.
• W — Wounds: Dress secondary soft-tissue wounds and burns; apply rigid eye shields for ocular trauma.
• S — Splinting: Splint fractures; secure limbs; re-verify distal neurovascular status.

Tourniquet Conversion and Re-evaluation in TFC

A vital task during TFC is deliberate tourniquet management. Tourniquets placed "high and tight" over clothing during CUF must be reassessed:

1. Fully expose the wound by cutting away clothing.
2. Determine if the bleeding site is compressible and located on an extremity.
3. If anatomical margins permit, apply a deliberate tourniquet 2 to 3 inches above the wound directly against the skin (never over a joint).
4. Tighten the deliberate tourniquet until bleeding stops and distal pulse is abolished, then cautiously loosen the initial high-and-tight tourniquet.
5. If the deliberate tourniquet holds hemostasis, the initial tourniquet can be left loosely in place proximal to the new one as a safety backup. Write the precise application time on the tourniquet strap using an indelible marker.

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6. Phase 3: Tactical Evacuation Care (TACEVAC)

Tactical Evacuation Care (TACEVAC) is the phase of care rendered while the casualty is being transported via air or ground assets to an en-route staging facility or higher echelon Medical Treatment Facility (Role 2 Forward Resuscitative Care or Role 3 Combat Support Hospital).

TACEVAC encompasses two distinct operational modalities that promotion board candidates must clearly differentiate:

   TACTICAL EVACUATION (TACEVAC)
   ─────────────────────────────────────────────────────────────────
   Modality        Platform Designation   Geneva Protection  Armament
   ─────────────────────────────────────────────────────────────────
   MEDEVAC         Dedicated Medical      YES (Red Cross)    Unarmed / Defensive Only
                   (e.g., HH-60M Dustoff) Marked             (Crew weapons only)
   
   CASEVAC         Armed Combat Asset     NO                 Fully Armed
                   (e.g., Gun Trucks,     Unmarked           (Offensive weapons,
                    CH-47, JLTVs)                            Direct fire systems)
   ─────────────────────────────────────────────────────────────────

MEDEVAC (Medical Evacuation)

• Definition: Dedicated, non-combatant medical platforms designed, equipped, and staffed specifically for en-route medical care.
• Emblem and Protection: Marked with the distinctive Red Cross emblem and protected under the terms of the Geneva Conventions. Under international humanitarian law, dedicated MEDEVAC platforms must not carry offensive ordnance or engage in offensive tactical maneuvers.
• Staffing and Capabilities: Staffed by flight paramedics or en-route critical care nurses; equipped with advanced monitoring devices, blood products, mechanical ventilators, and suction units.

CASEVAC (Casualty Evacuation)

• Definition: The tactical movement of casualties using organic, armed, non-dedicated combat platforms (such as infantry fighting vehicles, JLTVs, cargo trucks, or multi-mission assault helicopters like the CH-47 Chinook or UH-60 assault variant).
• Legal Status: Non-protected combatants. These vehicles and aircraft carry mounted machine guns, rockets, and combat troops; they are legitimate targets under the Law of Armed Conflict.
• Medical Limitations: Medical equipment and provider staffing are limited to whatever personnel and supplies are onboard or accompany the casualty.

En-Route Care Responsibilities

During TACEVAC, medical personnel and vehicle escorts must:

• Package the casualty: Secure the casualty firmly to a standardized NATO litter using litter straps; insulate the casualty to counteract extreme hypothermic wind chill in open flight doors or unheated vehicle beds.
• Continuous monitoring: Constantly recheck tourniquets, chest seals, and airway patency. Changes in altitude and vibration can cause dislodgement of dressings or expansion of trapped intrathoracic air.
• Transfer documentation: Ensure DD Form 1380 (TCCC Casualty Card) is physically affixed to the casualty's wrist or uniform for handoff to the receiving trauma surgical team.

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7. Cross-Phase Comparison Matrix

The following matrix summarizes the operational parameters distinguishing the three phases of TCCC: