Primary Survey: ABCDE Assessment for Paramedics

What Is the Primary Survey?

The primary survey is the cornerstone of pre-hospital patient assessment. As a student paramedic, you will use it on virtually every call — from the unconscious patient slumped in a chair to the cyclist thrown from their bike. Its purpose is deceptively simple: identify and manage immediately life-threatening conditions in a systematic, prioritised order before anything else happens.

In UK pre-hospital practice, the primary survey follows the ABCDE framework — Airway, Breathing, Circulation, Disability, and Exposure. This approach is endorsed by the Joint Royal Colleges Ambulance Liaison Committee (JRCALC), the UK Resuscitation Council, and forms the backbone of ambulance service clinical governance across all NHS trusts.

Crucially, the ABCDE assessment is not just a checklist — it is a dynamic, iterative process. You treat each life threat as you find it before moving to the next step. If a patient deteriorates, you return to A and start again.

A — Airway

Your first priority is always the airway. A compromised airway will kill faster than anything else. Begin by assessing whether the airway is patent, at risk, or obstructed.

• Look for chest rise, foreign bodies, vomit, blood, or swelling.
• Listen for stridor, gurgling, snoring, or silence.
• Feel for air movement against your cheek or hand.

In an unresponsive adult, use a head-tilt chin-lift or jaw thrust (if spinal injury is suspected) to open the airway. Consider simple adjuncts: an oropharyngeal airway (OPA/Guedel) in the unconscious patient with no gag reflex, or a nasopharyngeal airway (NPA) in the semi-conscious patient. For complete obstruction, escalate rapidly — suction, repositioning, and in extremis, surgical airway techniques depending on your scope of practice.

Document whether the airway is self-maintaining, maintained with adjuncts, or requires active management. This directs your ongoing treatment and handover.

B — Breathing

Once the airway is open, assess the adequacy of breathing. An open airway does not guarantee effective ventilation.

• Respiratory rate (normal adult: 12–20 breaths per minute)
• Oxygen saturation (SpO2) via pulse oximetry
• Chest symmetry, expansion, and use of accessory muscles
• Auscultation — bilateral air entry, wheeze, crepitations, absent sounds
• Percussion if indicated (hyper-resonance suggests pneumothorax; dullness suggests haemothorax)

Immediately life-threatening breathing conditions include tension pneumothorax, open chest wounds, massive haemothorax, and flail chest. Manage findings as you identify them — apply high-flow oxygen (usually 15L/min via non-rebreather mask in trauma or critical illness), provide BVM ventilation if breathing is inadequate, and seal open chest wounds with a dedicated chest seal or improvised dressing.

In line with JRCALC guidance, target SpO2 of 94–98% in most patients, or 88–92% in those at risk of hypercapnic respiratory failure (e.g. known COPD).

C — Circulation

Haemorrhage is the leading preventable cause of death in trauma. At this stage, your goal is to identify and control life-threatening bleeding and assess for shock.

• Control catastrophic external haemorrhage — direct pressure, wound packing, tourniquets for limb haemorrhage
• Assess skin colour, temperature, and capillary refill time (CRT >2 seconds is significant)
• Palpate the pulse — rate, rhythm, and quality
• Measure blood pressure where time and resources allow
• Look for signs of internal bleeding: distended abdomen, pelvic instability, long bone deformity

In the UK pre-hospital setting, permissive hypotension is an accepted strategy in haemorrhagic shock — targeting a systolic BP of around 80–90 mmHg in penetrating trauma until surgical haemostasis is achieved. Establish IV or IO access and administer fluids judiciously. Consider tranexamic acid (TXA) early in trauma where significant haemorrhage is suspected — JRCALC supports its use within three hours of injury.

D — Disability

Disability refers to neurological status. A rapid but structured assessment gives you a baseline and helps identify conditions such as hypoglycaemia, head injury, or stroke.

• AVPU scale: Alert, Voice, Pain, Unresponsive — quick and reproducible
• GCS: More detailed; essential for head injury documentation and hospital handover
• Pupils: Size, equality, and reactivity (PEARL — Pupils Equal And Reactive to Light)
• Blood glucose: Check in any patient with altered consciousness — hypoglycaemia is rapidly reversible and must not be missed
• Posture: Assess for abnormal flexion (decorticate) or extension (decerebrate) posturing

A GCS of 8 or below is a recognised threshold for airway compromise — consider whether you need to escalate your airway management. Any focal neurological deficit should raise suspicion of stroke; use the FAST or ROSIER tool as part of your broader assessment.

E — Exposure

The final step is a focused exposure of the patient to ensure no significant injuries or findings are missed. Expose relevant body areas systematically while maintaining dignity and managing hypothermia risk — both of which are entirely compatible with a thorough assessment.

• Log roll where spinal injury is a concern, examining the back for wounds or deformity
• Check for rashes (e.g. non-blanching purpura in meningococcal disease)
• Identify wounds, burns, swelling, or bruising
• Note temperature — use a low-reading thermometer if hypothermia is suspected

Cover the patient promptly after examination, particularly in outdoor environments or during prolonged scene times. Hypothermia worsens coagulopathy and acidosis in the trauma triad of death.

Putting It All Together

The ABCDE primary survey is designed to be performed in under two minutes in a critically unwell patient, yet it must be thorough enough to detect every immediately reversible life threat. In practice, this means working smoothly, communicating clearly with your crew mate, and reassessing frequently — particularly after any intervention or change in patient condition.

As a student paramedic, drilling this framework until it becomes instinctive is one of the most important things you can do. Clinical placements and simulation practice will help embed the sequence, but structured self-study reinforces the underpinning knowledge that makes your hands-on performance safe and effective.