8.4 Bleeding Control, Tourniquets, Eye Irrigation & Hazmat Evacuation PAIs

8.4 Bleeding Control, Tourniquets, Eye Irrigation & Hazmat Evacuation PAIs

Quick Answer: For severe external hemorrhage, the EMD directs immediate continuous manual direct pressure using a clean cloth or towel pressed firmly into the wound with both hands; dressings must never be lifted to check the wound. For life-threatening extremity hemorrhage uncontrolled by direct pressure, the EMD coaches the deployment of a commercial windlass tourniquet applied 2 to 3 inches proximal to the injury (or high and tight), rotating the windlass rod until all bleeding stops, locking the rod, and never loosening the band. For chemical eye exposures, irrigation must begin immediately using tap water or saline for a minimum of 15 to 20 continuous minutes, directing the stream from the inner to outer canthus while manually holding the eyelids apart. In hazardous materials (Hazmat) incidents, the EMD acts as safety controller: coaching callers to evacuate upwind and uphill or execute Shelter-in-Place (shutting off HVAC, closing windows/doors, sealing gaps), while commanding responding units to stage outside the hazard perimeter.

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The Lethal Trauma Cascade: Preventing Exsanguination and Toxic Exposure

In major traumatic injury and toxic exposures, the timeline of patient survival is compressed into minutes. Exsanguinating arterial hemorrhage from an extremity can produce irreversible hemorrhagic shock and death within 90 to 180 seconds—far faster than the most rapid ambulance transit times. Similarly, caustic alkaline chemicals contacting the eye cause liquefactive necrosis that permanently destroys corneal architecture within minutes unless immediately diluted.

In toxic chemical releases, failure of dispatch scene assessment can result in the chemical incapacitation of callers, civilian bystanders, and responding fire-EMS crews who drive blindly into invisible vapor plumes. The IAED Dispatch Life Support protocols for trauma, ocular irrigation, and Hazmat evacuation convert the emergency telecommunicator into an active, life-saving remote clinician.

+=========================================================================+
|                TIME-CRITICAL TRAUMA & ENVIRONMENTAL PAIs                |
|                                                                         |
|   [MASSIVE HEMORRHAGE] --> Two-handed direct pressure; NEVER lift cloth |
|   [EXTREMITY BLEEDING] --> Commercial windlass tourniquet; tighten fully|
|   [CHEMICAL EYE INJURY]--> Flush 15-20 min continuously, inner-to-outer |
|   [HAZMAT / TOXIC GAS] --> Evacuate UPWIND/UPHILL or Shelter-in-Place   |
+=========================================================================+

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Direct Pressure Hemorrhage Control Protocols

Direct manual pressure remains the foundational frontline intervention for all external bleeding. The EMD guides the caller with authoritative, step-by-step instructions:

1. The Scripted Direct Pressure Sequence

• Step 1: Firm Material Placement: "Take a clean cloth, towel, or shirt and place it directly over the bleeding wound."
• Step 2: Two-Handed Continuous Pressure: "Place both of your hands over the cloth and press down as hard as you can! Lean your body weight into your hands!"
• Step 3: Unbroken Hemostasis (The 'Never Peek' Rule): "Keep pressing down firmly and do NOT lift the cloth to look at the wound! Even if blood soaks through, keep pressing hard and place another cloth on top!"

2. Clinical Rationale: Preserving the Fragile Platelet Plug

Untrained callers frequently lift the bloody towel every 30 seconds to "see if it has stopped." This fatal action disrupts the nascent fibrin mesh and fragile platelet aggregation forming at the severed vascular wall, tearing the clot away and resetting the coagulation cascade. Continuous uninterrupted compression tamponades the severed blood vessel against underlying bone or muscle tissue, allowing physiological clotting mechanisms to achieve hemostasis.

3. Deep Wound Packing for Junctional Wounds

For deep cavitation wounds in junctional anatomical zones (groin, armpit, or base of neck) where tourniquets cannot be anatomically placed, the EMD instructs the caller to pack the cloth or gauze deep into the wound cavity until packed tight, then apply relentless two-handed pressure directly over the packed cavity.

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Commercial Tourniquet Coaching Protocol

When direct pressure fails to halt catastrophic arterial spurting from an arm or leg, or when a traumatic amputation has occurred, the EMD immediately escalates to the Tourniquet PAI Protocol.

                    WINDLASS TOURNIQUET APPLICATION

            [Proximal Limb / 2-3 Inches Above Wound]
                            |
      +---------------------+---------------------+
      |                                           |
1. Cinch Band Tightly                2. Twist Windlass Rod
   (Pull all slack out before twisting)  (Rotate until bleeding stops)
      |                                           |
3. Lock Rod Into Clip                4. Secure With White Strap
   (Prevents unwinding)                  (Write Exact Time on Band)
      |                                           |
      +---------------------+---------------------+
                            |
             NEVER LOOSEN OR REMOVE TOURNIQUET!

1. Step-by-Step Windlass Tourniquet Coaching

• Placement: "Place the tourniquet around the injured arm/leg, 2 to 3 inches above the bleeding site. Do NOT place it directly over a joint like the elbow or knee. If you aren't sure where the bleeding is coming from, place it high and tight at the top of the limb."
• Cinching Slack: "Pull the free end of the strap as tight as you possibly can and fasten it back down on itself. There must be NO slack between the strap and the limb before you twist!" (Failing to pull slack completely out is the #1 reason tourniquets fail, bottoming out the windlass before arterial occlusion is achieved).
• Rotating the Windlass: "Turn the plastic or metal rod firmly. Keep twisting the rod until the bright red bleeding completely stops!"
• Locking the Rod: "Slide the rod into the plastic clip to lock it so it cannot unwind."
• Securing and Timing: "Pull the remaining strap over the rod and fasten the white time-strap. Write the current time on the strap or on the patient's forehead."

2. Critical Prehospital Tourniquet Rules

• Extreme Pain is Normal: The EMD warns the caller: "Tightening the tourniquet will be extremely painful for the patient. You must keep turning the rod until the bleeding stops regardless of their pain! It is saving their life."
• The Absolute Prohibition on Loosening: Callers must NEVER loosen, release, or remove a tourniquet once applied. Releasing a tourniquet re-initiates catastrophic arterial hemorrhage and flushes accumulated ischemic metabolic toxins (potassium, lactic acid, myoglobin) into central circulation, triggering fatal dysrhythmias and sudden cardiac arrest.
• Improvised Tourniquets: If a commercial device is unavailable, an improvised tourniquet (a wide cloth strap at least 2 inches wide and a rigid stick/pipe twisted as a windlass) may be coached. Thin items such as wire, string, or shoelaces are strictly forbidden because they cut skin and fail to occlude deep arteries.

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Chemical Eye Exposure: Continuous Ocular Irrigation

Chemical burns to the eye represent true ophthalmic emergencies where minutes dictate the difference between preserved sight and irreversible blindness.

Acid vs. Alkali Pathophysiology

• Acids: Cause coagulation necrosis, precipitating proteins that form a protective barrier that limits deeper ocular penetration (though concentrated hydrofluoric or sulfuric acid remains devastating).
• Alkalis (Lye, drain cleaner, ammonia, wet cement, bleach): Cause liquefactive necrosis. Alkalis saponify cell membrane fatty acids and rapidly penetrate into the anterior chamber, destroying the corneal endothelium, trabecular meshwork, and lens within minutes.

Dispatch-Coached Ocular Irrigation Instructions

1. Immediate Onset: "Do not wait for the ambulance! We must begin washing the eye with clean tap water right now!"
2. Directional Flushing (Inner-to-Outer Canthus): "Tilt their head so the injured eye is DOWN and toward the side. Pour water gently starting at the corner of the eye near the nose, letting it wash across the eye and drain off the cheek away from the other eye." This prevents chemical runoff from contaminating the unaffected eye.
3. Holding Lids Apart: "You must hold their eyelids wide open with your fingers while pouring the water. They will want to squeeze their eye shut, but you must keep the lids apart so the water washes under the eyelids."
4. Duration: Irrigation must continue uninterrupted for a minimum of 15 to 20 minutes (or until emergency responders arrive and take over with sterile eyewash).
5. Contact Lenses: If contact lenses are present, they should be flushed out during irrigation; do not delay flushing to remove them mechanically.

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Hazardous Materials (Hazmat) & Toxic Inhalation Protocols

When a caller reports a tanker leak, industrial vapor plume, strange chemical odor, or unconscious individuals in an enclosed space (sewer, tanker, chemical storage room), the EMD's primary responsibility expands from individual patient care to catastrophic scene safety management.

1. The EMD as Remote Safety Officer: Triage Decisions

                     HAZMAT DISPATCH SCENE CONTROL
                                   |
                   Is Toxic Plume or Hazard Present?
                                   |
          +------------------------+------------------------+
          |                                                 |
  Evacuation Feasible?                             Evacuation Dangerous?
  (Clear, unobstructed route)                      (Surrounded by dense plume)
          |                                                 |
[UPWIND / UPHILL EVACUATION]                       [SHELTER-IN-PLACE PROTOCOL]
  - Move perpendicular to wind                       - Move to interior room
  - Move to higher ground                            - Shut off all HVAC/fans
  - Leave hazard zone immediately                    - Seal doors/vents with damp towels
          |                                                 |
          +------------------------+------------------------+
                                   |
              [CAD RESPONDER STAGING NOTIFICATION]
              - Stage units UPWIND and OUTSIDE hazard perimeter
              - Never allow units to enter hot zone unprotected

2. Evacuation: Upwind, Uphill, Upstream

• If outdoors or able to safely leave the immediate vicinity, instruct: "Leave the area immediately. Move UPWIND—with the wind blowing in your face or across your path—and move to higher ground (UPHILL). Chemical gases are often heavier than air and sink into valleys and basements."

3. Shelter-in-Place Pre-Arrival Scripting

If callers are trapped within a building or downwind of an uncontrollable toxic gas release (e.g., chlorine gas or anhydrous ammonia):

• Select Safe Room: "Go to an interior room on an upper floor (for heavy sinking gases) or interior room without windows."
• Halt Air Ingestion: "Immediately turn off all air conditioners, heating systems, and ventilation fans! Close all fireplace dampers."
• Seal Apertures: "Close all windows and doors. Take damp towels, sheets, or plastic wrap and tape or pack them tightly around the cracks of the doors, windows, and air vents to keep vapors out."

4. CAD Staging and Responder Protection

The dispatcher must prevent arriving EMS and fire units from becoming secondary casualties:

• Broadcast explicit Hazmat Staging Directives over CAD and radio channels.
• Mandate that all responding units stage UPWIND and UPHILL outside the designated exclusion perimeter (Hot Zone).
• Forbid field personnel from entering structures or approaching vapor plumes until specialized Hazardous Materials teams in Level A/B encapsulated chemical protective suits assess the atmosphere.

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Comprehensive Trauma & Environmental PAI Reference Matrix

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Realistic Dispatch Scenario: Industrial Extremity Hemorrhage

EMD:        "9-1-1 Emergency, what is the address of the emergency?"
CALLER:     "Apex Metal Fabrication, Bay 4! 1200 Industrial Parkway!"
EMD:        "What is the phone number you're calling from?"
CALLER:     "555-7733! We have a catastrophic injury! A metal shear snapped!"
EMD:        "Tell me exactly what happened."
CALLER:     "A worker's right thigh is sliced open to the bone! Blood is spurting 
            out across the floor like a fire hose! He's turning white!"
EMD:        [IDENTIFIES DANGEROUS HEMORRHAGE -> PROTOCOL 21-D-4 DELTA DISPATCH]
            "Paramedics are responding on an emergency. I am staying on the line. 
            We need to stop this bleeding right now. Do you have a first aid kit 
            with a commercial tourniquet?"
CALLER:     "Yes! We have an OSHA trauma kit with a CAT tourniquet right here!"
EMD:        "Take the tourniquet out right now. Listen to my exact instructions."
CALLER:     "I have it out!"
EMD:        "Slide the tourniquet around his right thigh, 2 to 3 inches above the wound. 
            Pull the strap through the buckle as tight as you can pull it! Pull all 
            the slack out before you turn the rod!"
CALLER:     "The strap is cinched down tight!"
EMD:        "Now grab the plastic rod and twist it firmly! Keep turning the rod! It 
            will hurt him terribly, but keep turning until the spurting blood stops!"
CALLER:     "He's screaming... I turned it three times... the spurting has stopped!"
EMD:        "Lock the rod into the plastic clip right now so it cannot unwind!"
CALLER:     "The rod is locked into the clip!"
EMD:        "Pull the white strap across the clip to secure it. Do NOT loosen that 
            tourniquet under any circumstances! Write the current time on the white strap."
CALLER:     "I wrote 14:15 on the strap. The bleeding has completely stopped."
EMD:        "Keep him lying flat on his back, cover him with a coat to keep him warm, 
            and do not touch that tourniquet. The ambulance is pulling into your driveway."