Airway, Breathing, Circulation priorities

Primary Survey - First Things First

Treat the greatest threat to life first. The ATLS®-derived ABCDE approach is the cornerstone of managing critically ill patients.

• Airway: Assess patency. Assume C-spine injury in trauma → Jaw thrust.
• Breathing: Check rate, O₂ sat. Provide high-flow oxygen.
• Circulation: Control hemorrhage. Establish 2 large-bore IV lines.
• Disability: AVPU (Alert, Verbal, Pain, Unresponsive) or GCS.
• Exposure: Fully undress patient; prevent hypothermia.

⭐ In unconscious patients, the tongue is the most common cause of airway obstruction.

Airway Management - The A‑Game

• Assess: Look for chest rise, listen for breath sounds, feel for air movement. Signs of obstruction: stridor, accessory muscle use, paradoxical breathing.
• Basic Maneuvers:
  • Non-Trauma: Head-tilt, chin-lift.
  • Trauma (C-Spine risk): Jaw thrust.
  • Adjuncts: Oropharyngeal Airway (OPA) in unconscious patients (no gag reflex); Nasopharyngeal Airway (NPA) in semi-conscious patients.
• Advanced (Definitive) Airway:
  • Endotracheal Intubation (ETI) is the gold standard.
  • Surgical airway (e.g., Cricothyroidotomy) if intubation fails ("Can't Intubate, Can't Oxygenate").

⭐ Key Indication for Intubation: Glasgow Coma Scale (GCS) ≤ 8, inability to protect airway, or impending respiratory failure.

Breathing & Ventilation - B‑Line to Life

• Assess: Look (effort, cyanosis), Listen (air entry), Feel (expansion). Check rate (>20 or <12/min is critical) & SpO₂ (Target >94%).
• Oxygenate: High-flow O₂ via Non-Rebreather Mask (NRBM) at 15 L/min for all critical patients.
• Ventilate: If ↓ GCS or respiratory failure, use Bag-Valve-Mask (BVM).
  • 📌 MOANS for difficult BVM: Mask seal, Obesity/Obstruction, Age >55, No teeth, Stiff lungs.

⭐ For tension pneumothorax, immediate needle decompression is life-saving: 2nd intercostal space, mid-clavicular line OR 5th ICS, anterior axillary line.

Circulation & Shock - Pump Up the Volume

• Assess: Check central pulse (carotid/femoral), BP & Capillary Refill Time (CRT < 2 sec).
• Control Hemorrhage: Stop the bleed! Apply direct pressure. Use tourniquet for severe limb bleeding.
• IV Access: Secure 2 large-bore IV cannulas (16-18G). If peripheral access fails, consider central line or IO access.
• Fluid Resuscitation:
  • Start isotonic crystalloids (Normal Saline, Ringer’s Lactate).
  • Initial adult bolus: 1-2 L wide open.
  • Pediatric bolus: 20 mL/kg.

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⭐ The Lethal Triad of Trauma: Hypothermia, Acidosis, and Coagulopathy. Aggressive resuscitation with cold fluids worsens this vicious cycle. Use warmed fluids whenever possible.

Disability & Exposure - The Finishing Touches

• Disability (D): Quick neuro-assessment.
  • 📌 AVPU Scale: Alert, responds to Voice, Pain, or Unresponsive.
  • Check pupils & blood glucose.
• Exposure (E): Fully undress patient to find all injuries. Immediately cover with warm blankets to prevent hypothermia (the lethal triad).

⭐ A GCS score of ≤ 8 is a critical indication for definitive airway management (intubation).

High-Yield Points - ⚡ Biggest Takeaways

• The ABC (Airway, Breathing, Circulation) sequence is the cornerstone of emergency management.
• Airway obstruction is the most immediate life-threatening condition; secure it first.
• A patent airway does not guarantee adequate ventilation or oxygenation.
• In trauma, the sequence becomes ABC, prioritizing control of catastrophic hemorrhage.
• After stabilizing ABCs, proceed to D (Disability) and E (Exposure/Environment).
• Always re-evaluate the ABC status after any intervention.