7.1 Basic Life Support (BLS), CPR & AED Operation

7.1 Basic Life Support (BLS), CPR & AED Operation

Quick Summary: Security personnel in Dubai frequently serve as the initial on-scene responders during critical medical emergencies. When responding to a sudden collapse, guards must execute the standardized DRABC primary survey: assess Danger, check Response (AVPU), open the Airway (head-tilt / chin-lift), check for normal Breathing (look, listen, and feel for up to 10 seconds), and assess Circulation. If an adult casualty is unresponsive and not breathing normally (or exhibiting agonal gasps), dispatch Dubai Ambulance (998), retrieve an Automated External Defibrillator (AED), and initiate cardiopulmonary resuscitation (CPR) at a ratio of 30 compressions to 2 rescue breaths at a depth of 5 to 6 cm and a rate of 100 to 120 compressions per minute.

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The Security Guard's First Responder Role

Under the regulatory framework enforced by the Security Industry Regulatory Agency (SIRA), private security officers stationed in shopping malls, residential towers, commercial free zones, hotels, and entertainment complexes bear a legal duty of care to preserve life and maintain public safety. In acute medical crises—such as sudden cardiac arrest, drowning, electrocution, or severe trauma—the time window between clinical collapse and irreversible brain death is typically 4 to 6 minutes. Because municipal emergency medical services require transit time to navigate urban traffic, the immediate actions taken by on-duty security guards determine casualty survival.

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The Primary Survey: The DRABC Protocol

The primary survey is a rapid, systematic clinical assessment designed to identify and immediately treat life-threatening conditions in order of physiological priority. Use DRABC to structure the assessment. Call 998 promptly for an unresponsive person, use speakerphone if available and follow the dispatcher. Address immediately apparent life-threatening bleeding without waiting to complete a checklist.

Assessing Responsiveness: The AVPU Framework

Security officers document the casualty's neurological status using the four-level AVPU scale:

1. A — Alert: The casualty is fully awake, opens eyes spontaneously, responds to questions, and tracks movement.
2. V — Voice: The casualty appears drowsy or asleep but responds verbally or opens eyes when addressed loudly.
3. P — Pain: The casualty does not respond to voice but reacts to physical stimuli (e.g., gentle shoulder pinch or trapezius squeeze) with purposeful movement, groaning, or eye opening.
4. U — Unresponsive: The casualty makes no verbal, facial, or motor response to voice or painful stimuli. An unresponsive state indicates a life-threatening emergency requiring immediate airway protection.

Airway Opening Techniques

When a person loses consciousness, muscular tone is lost throughout the hypopharynx. The relaxed base of the tongue drops against the posterior pharyngeal wall, creating an anatomical blockage.

• Head-Tilt / Chin-Lift Maneuver: For non-trauma casualties, place one hand on the casualty's forehead and tilt the head back gently into a neutral, sniffing position. Simultaneously, place the fingertips of your other hand under the bony point of the chin and lift the mandible upward. Avoid pressing deep into the soft tissues of the throat, as this can compress the airway.
• Jaw-Thrust Maneuver: When head, neck, or spinal trauma is suspected (e.g., falls from height, motor vehicle collisions, diving incidents), avoid neck extension. Position yourself at the top of the casualty's head, place your fingers behind the angles of the lower jaw (mandible), and push the jaw forward and upward with your thumbs resting on the cheekbones, while minimising neck movement. If the airway cannot be opened this way, use head-tilt/chin-lift: oxygenation takes priority. Follow your training and the dispatcher’s instructions.

Assessing Breathing: Look, Listen, and Feel

Maintaining the open airway, position your cheek 2 to 3 cm above the casualty's mouth and nose while observing their exposed chest and abdomen. Maintain this assessment for a minimum of 5 seconds but no more than 10 seconds:

• LOOK for regular, rhythmic expansion and relaxation of the chest wall and upper abdomen.
• LISTEN with your ear for air movement, exhalations, or airflow turbulence.
• FEEL on your cheek for warm exhaled air.

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The Recovery Position: Unconscious Breathing Casualty

If the casualty is unresponsive but breathing normally without significant trauma, ensure Ambulance 998 has been called and use the lateral recovery position. Maintain the airway and watch breathing continuously; abnormal breathing requires CPR.

Clinical Rationale for the Recovery Position

1. Tongue Clearance: Tilting the head back keeps the base of the tongue from falling backward against the airway.
2. Postural Drainage: The mouth points downward toward the ground, allowing saliva, blood, mucus, or vomitus to drain freely by gravity rather than being drawn into the lungs (preventing lethal aspiration pneumonia).
3. Physical Stability: The bent knee and elbow act as structural outriggers, preventing the casualty from rolling onto their stomach or back.

Step-by-Step Recovery Position Technique

1. Kneel beside the casualty lying supine. Remove eyeglasses and check pockets for bulky objects.
2. Extend the casualty's nearest arm out at a right angle (90°) to their body, elbow bent with palm facing upward.
3. Bring the casualty's far arm across their chest and place the back of their hand flat against their near cheek, holding it in place.
4. With your free hand, grasp the casualty's far leg just above the knee and pull it upward, bending the knee while keeping the foot flat on the ground.
5. Keeping the casualty's hand pressed against their cheek, pull on the bent far leg to roll the casualty smoothly toward you onto their side.
6. Tilt the head backward to ensure the airway remains open. Adjust the upper hand beneath the cheek to support head position.
7. Position the upper leg so both the hip and knee form right angles (90°).
8. Monitor breathing continuously until Dubai Ambulance arrives. If normal breathing ceases at any point, roll the casualty onto their back and begin CPR immediately.

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Adult Cardiopulmonary Resuscitation (CPR)

Cardiopulmonary Resuscitation (CPR) is an emergency procedure combining manual rhythmic chest compressions and artificial rescue ventilations designed to manually pump oxygenated blood through the coronary and cerebral vascular beds during cardiac arrest.

Executing the CPR Sequence

1. Positioning: Start CPR where the casualty is found if safe and effective. Do not delay compressions to move them from a bed to the floor; follow the dispatcher’s instructions.
2. Chest Compressions (30): Place the heel of your dominant hand on the center of the chest (lower half of the sternum). Place the heel of your other hand on top and interlock your fingers. Keeping your arms straight and elbows locked, position your shoulders directly above the casualty's sternum. Depress the chest smoothly to a depth of 5 to 6 cm at a tempo of 100 to 120 bpm (synchronized to the rhythm of "Stayin' Alive"). Count out loud: "1, 2, 3... 28, 29, 30."
3. Rescue Breaths (2): Open the airway using the head-tilt / chin-lift. Seal a personal pocket mask firmly over the casualty's nose and bridge of the chin (or pinch the nostrils closed if using a mouth-to-mouth barrier sheet). Deliver a normal breath over 1 second, observing the chest rise. Deliver a second breath over 1 second. The total interruption to compressions must not exceed 10 seconds.
4. Hands-Only CPR Alternative: If the security officer does not possess personal protective barrier equipment (such as a pocket mask with a HEPA filter) or is unwilling to provide rescue breaths, they must perform continuous Hands-Only CPR (uninterrupted chest compressions at 100–120 bpm) without stopping until an AED arrives or paramedics take over.
5. Rescuer Rotation: Chest compressions are physically demanding. Rescuer fatigue causes compression depth to degrade within 2 minutes. When multiple security officers are present, rotate the compressor role every 2 minutes (or every 5 cycles of 30:2), transitioning in under 5 seconds during AED rhythm analysis.

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Automated External Defibrillator (AED) Operation

An Automated External Defibrillator (AED) is a portable, microprocessor-controlled medical device capable of analyzing cardiac electrical activity, identifying shockable lethal arrhythmias, and delivering a controlled electrical shock (defibrillation) through the myocardium.

The Science of Defibrillation

Sudden cardiac arrest is most frequently initiated by Ventricular Fibrillation (VF)—a chaotic, uncoordinated quivering of the ventricular muscle fibers that completely stops forward blood pumping—or pulseless Ventricular Tachycardia (pVT). Defibrillation does not "jump-start" a flatlined heart (asystole); rather, it delivers an electrical current that momentarily depolarizes all myocardial cells simultaneously, allowing the heart's natural pacemaker (the Sinoatrial Node) to resume a synchronized, pumping rhythm.

Step-by-Step AED Operating Protocol

1. Power On Immediately: As soon as the AED arrives at the scene, open the lid or press the ON button immediately. The device will issue audible voice prompts and illuminate visual diagrams. Follow every prompt without hesitation.
2. Expose and Prepare the Bare Chest: Rapidly cut or open the casualty's clothing to expose the bare torso.
   • Dry the Skin: If the casualty is sweaty, has been extracted from a pool, or has been in the rain, vigorously wipe the chest dry with a towel from the AED prep kit. Water conducts electricity across the skin surface, causing superficial burns and preventing the shock from reaching the myocardium.
   • Excessive Chest Hair: Only if hair prevents good pad contact, quickly shave the pad sites with the preparation-kit razor. Do not use up the available electrodes to remove hair; apply usable pads promptly and follow the AED instructions.
   • Medical Patches: If transdermal drug patches (e.g., nitroglycerin, nicotine) are present on the chest, remove them with a gloved hand and wipe the residue clean before placing pads.
   • Implanted Pacemakers: Look for a surgical scar and a hard, coin-sized bulge beneath the skin near the collarbone. Avoid placing pads directly over the implanted device; follow the AED’s pad diagram and instructions without delaying defibrillation.
   • Metal Jewelry: Do not place pads directly over metal chains, body piercings, or bra underwires.
3. Attach Self-Adhesive Electrode Pads: Place the pre-gelled electrode pads firmly onto the bare skin using the Anterolateral Configuration:
   • Pad 1 (Upper Right): Position on the upper right anterior chest, directly below the right clavicle (collarbone) and to the right of the breastbone.
   • Pad 2 (Lower Left): Position on the lower left ribcage, along the mid-axillary line, slightly below and lateral to the left nipple and armpit.
4. Rhythm Analysis — Stand Clear: Plug the pad cable into the AED socket (if not pre-connected). The AED will state: "Analyzing heart rhythm. Do not touch the patient." The security guard must hold their hands up and shout loudly: "STAND CLEAR! DO NOT TOUCH THE PATIENT!" Ensure no rescuer or bystander is touching the casualty or clothing, as movement disrupts the electrocardiographic analysis.
5. Shock Delivery: If a shockable rhythm is detected, the device will charge and announce: "Shock advised. Charging. Stand clear of patient." Visually confirm all persons are clear from head to toe, shout "STAND CLEAR!", and firmly press the flashing SHOCK button (fully automated models will count down and deliver the shock automatically).
6. Immediate Post-Shock Action: As soon as the shock is delivered (or if the device announces "No shock advised"), immediately resume chest compressions (30:2) without checking for a pulse. Perform high-quality CPR for 2 minutes (approximately 5 cycles) until the AED prompts that it is re-analyzing the rhythm.

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Escalation & Emergency Dispatch: Dubai Ambulance (998)

In the UAE, emergency medical dispatch is coordinated by the Dubai Corporation for Ambulance Services (DCAS) and the National Ambulance network, reached via the unified nationwide emergency medical telephone number: 998.

Information Required by the 998 Dispatch Operator

When dialing 998, security guards must speak calmly, clearly, and concisely in English or Arabic, providing structured operational data:

1. Exact Geographical Location: Provide the commercial building name, tower block, plot number, street name, and community (e.g., "Al Wasl Tower, Sheikh Zayed Road, Downtown Dubai").
2. The Dubai Makani Number: State the unique 10-digit Makani Number affixed to the building's main entrance (e.g., "Makani 30032 95140"), enabling emergency vehicle GPS units to navigate directly to the doorway.
3. Specific Post Location: Detail the internal location ("Basement Level 2 parking, near Column B-14" or "45th floor executive lounge").
4. Nature of Emergency & Casualty Profile: State the exact situation ("Unresponsive adult male, approximately 45 years old, not breathing, suspected cardiac arrest").
5. Ongoing Interventions: Report current actions ("CPR in progress by SIRA-certified guards; AED pads attached; first shock delivered").
6. Casualty Count: Indicate the total number of affected individuals.
7. Site Access Coordination: Designate a specific security guard to stand at the street gate or main entrance to receive the ambulance crew, hold express service elevators on ground floor override, and guide paramedics directly to the casualty without delay.