What is the trauma primary survey?
Major trauma means injury serious enough to threaten life or cause long-term disability. The primary survey is the first structured assessment of an injured patient. Its purpose is to find the injuries that will kill the patient soonest and deal with them straight away.
It is not a checklist to complete before acting. The principle is to treat the greatest threat to life first. When you find a life-threatening problem, you treat it, then continue. In a full trauma team, several parts happen at the same time, with the team leader keeping the order of priority in mind.
In England, major trauma care is organised in regional networks, each with at least one major trauma centre supported by trauma units. NICE guideline NG39 covers assessment and initial management, NG40 covers service delivery, NG41 covers spinal injury and NG232 covers head injury.
What does <C>ABCDE stand for?
| Step | Meaning | Main question |
|---|---|---|
| <C> | Catastrophic haemorrhage | Is there severe external bleeding that will kill within minutes? |
| A | Airway with cervical spine protection | Is the airway open and safe, and is the spine protected where needed? |
| B | Breathing | Is there a life-threatening chest injury or failure of ventilation? |
| C | Circulation with haemorrhage control | Is the patient in shock, and where is the bleeding? |
| D | Disability | Is there a significant brain or spinal cord injury? |
| E | Exposure and environment | What injuries have we not seen, and is the patient getting cold? |
The traditional ABC sequence was adapted for trauma because massive external bleeding, for example from a limb, can kill faster than an airway problem. Putting <C> first means that bleeding is controlled before anything else. The angled brackets are simply a convention to show it comes before A.
Before the patient arrives: the pre-alert and team brief
Ambulance crews usually send a pre-alert, often in ATMIST format: Age, Time of incident, Mechanism, Injuries found or suspected, Signs (vital signs), and Treatment given with estimated arrival time. The same format is used for the face-to-face handover.
- Brief the team: The leader introduces themselves, confirms names and roles, and shares the pre-alert.
- Anticipate: Think aloud about the likely injuries and decide early whether to activate the major haemorrhage protocol.
- Prepare: Airway equipment and drugs, warmed fluids and blood products, rapid infuser, chest drain kit.
- Plan imaging: Warn CT if whole-body CT is likely.
- Hands-off handover: Unless there is an immediate life threat, the team listens in silence while the paramedic hands over, so information is not lost.
Working through the primary survey step by step
<C> Catastrophic haemorrhage
Look for major external bleeding. Apply firm direct pressure. NICE NG39 recommends a tourniquet for major limb trauma when direct pressure has failed to control life-threatening bleeding. Apply it high on the limb, tighten until bleeding stops, and record the time. Junctional wounds such as the groin or armpit may need packing with haemostatic dressings and pressure.
A: Airway with cervical spine protection
A patient who can talk normally has a patent airway for now. Look for blood, vomit, broken teeth or swelling. Use jaw thrust, suction and adjuncts. A patient who cannot protect their airway, for example with low consciousness or facial burns, needs a definitive airway from a skilled clinician. NICE NG41 moved practice away from routine rigid immobilisation for everyone: assess spinal risk and use spinal motion restriction where it is indicated, following local protocol.
B: Breathing
Expose the chest. Look at rate, effort, symmetry and wounds; feel for tenderness and surgical emphysema; listen on both sides. Give oxygen. Treat life-threatening chest injuries as you find them.
| Injury | Key signs | Immediate action |
|---|---|---|
| Tension pneumothorax | Worsening breathlessness, low saturations, absent breath sounds one side, falling blood pressure | Decompression by a trained clinician; NICE favours open thoracostomy followed by a chest drain where expertise exists |
| Open pneumothorax | Chest wound with air movement | Vented chest seal, then chest drain |
| Massive haemothorax | Reduced air entry, dull percussion, shock | Blood products, chest drain, urgent surgical opinion |
| Cardiac tamponade | Penetrating chest injury, shock, distended neck veins | Urgent senior help; specialist intervention |
| Flail chest | Segment moving paradoxically | Oxygen, good analgesia, ventilatory support if needed |
C: Circulation with haemorrhage control
Look for shock: rising heart rate, cool pale skin, slow capillary refill, confusion. Blood pressure may stay normal until late. Look for bleeding 'on the floor and four more': external, chest, abdomen, pelvis and long bones. If a pelvic injury is suspected, a pelvic binder should be applied at the level of the greater trochanters, and the pelvis should not be sprung.
- Tranexamic acid as soon as possible for active or suspected active bleeding; NICE says not more than 3 hours after injury unless there is evidence of hyperfibrinolysis. Check whether the ambulance crew already gave it.
- Replace volume with plasma and red cells in a 1:1 ratio in adults; avoid crystalloid for active bleeding in hospital.
- Use restrictive volume resuscitation until bleeding is controlled, maintaining a central pulse, with a less restrictive approach if traumatic brain injury dominates. Seek senior advice.
- Rapidly reverse anticoagulation in major trauma with haemorrhage, following local protocol and haematology advice.
- Move quickly to definitive control in theatre or interventional radiology. Imaging must not delay this for an unstable patient.
D: Disability
Assess the Glasgow Coma Scale, pupils and limb movement, and check blood glucose. NICE NG232 sets out which patients with head injury need CT and how quickly. Anticoagulant use raises the risk of intracranial bleeding.
E: Exposure and environment
Fully expose the patient to find all injuries, including the back when appropriate, while protecting dignity. Then cover them and actively prevent heat loss. Hypothermia worsens bleeding by impairing clotting.
Worked example: a motorcyclist with a chest injury
The pre-alert describes a heart rate of 130, blood pressure 90/60, respiratory rate 30, saturations 91% on high-flow oxygen, GCS 14, a deformed left thigh and a pelvic binder in place. Tranexamic acid was given at the scene. The team leader activates the major haemorrhage protocol before arrival. There is no catastrophic external bleeding. Ryan is talking but confused, so his airway is patent. Breath sounds are reduced on the right and the chest is dull. A trained clinician inserts a chest drain, which drains a large volume of blood, and the thoracic team is called. Blood products are given 1:1 through a warmer, aiming for a central pulse. GCS is 14 with equal pupils and normal glucose. He is fully examined and covered with warm blankets. After four units of blood products his heart rate is 112 and he has a strong central pulse, so the leader judges him safe for whole-body CT with the team, with theatres alerted.
Team leader: 'Let's get him straight to CT and see what's going on.' The haemothorax is found on the scan table while his blood pressure falls.
Team leader: 'Breath sounds are reduced on the right with dullness. I think this is a haemothorax. Sam, please prepare for a chest drain now. Priya, start the major haemorrhage pack 1:1 through the warmer. We'll reassess before deciding on CT.'
The strong version treats the threat as it is found and shares the leader's thinking aloud, so the team can anticipate and challenge. The primary survey is repeated after every intervention, whenever the patient changes, and before transfer.
What is the difference between the primary and secondary survey?
| Primary survey | Secondary survey | |
|---|---|---|
| Purpose | Find and treat immediate threats to life | Identify all injuries |
| Timing | On arrival, repeated whenever the patient changes | Once the patient is stabilised, often after CT or surgery |
| Style | Rapid, ordered, treat as you go | Detailed head-to-toe examination and full history |
| Follow-up | Leads to resuscitation and definitive control | Often followed by a tertiary survey, usually within 24 hours, to catch missed injuries |
A short structured history helps: allergies, medicines (especially anticoagulants), past history, last meal and events. Give early, effective pain relief. NICE NG39 recommends intravenous morphine first line in hospital, titrated to effect, with ketamine at analgesic doses as a second-line option. Splinting fractures also reduces pain.
Older people, safeguarding and handover
A growing share of major trauma in the UK involves older people who fall from standing or a low height. Injuries are easy to underestimate. Beta-blockers can mask a fast heart rate, a 'normal' blood pressure may be low for someone usually hypertensive, and anticoagulants increase the risk of serious bleeding, particularly in the head.
- Consider safeguarding in every injured patient: domestic abuse, elder abuse and non-accidental injury in children. Record the explanation and whether it fits.
- For assaults and stabbings, follow local policy on informing the police and apply professional judgement on confidentiality.
- Record times of tourniquets, blood products, drugs and key decisions.
- Use a structured handover such as ATMIST or SBAR when handing over to theatre, critical care or a ward.
Building your trauma knowledge
Trauma care is a team skill that improves with simulation, debriefs and reflection on real cases. Accredited hands-on courses remain essential for anyone who leads or performs procedures.
Our Trauma Primary Survey and Initial Management course is a knowledge update on UK trauma principles, covering pre-alerts, <C>ABCDE, haemorrhage control, imaging and handover, with a worked scenario and reflection. Adult Advanced Life Support and Paediatric Life Support cover cardiac arrest management.
Frequently asked questions
What does <C>ABCDE mean in trauma?
It is the order of the trauma primary survey used in UK practice. <C> is catastrophic haemorrhage, A is airway with cervical spine protection, B is breathing, C is circulation with haemorrhage control, D is disability (neurological status) and E is exposure and environment. Catastrophic bleeding comes first because it can kill within minutes.
Why is catastrophic haemorrhage assessed before the airway?
Severe external bleeding, especially from a limb, can cause death within minutes, sometimes faster than an airway problem. Controlling it immediately with direct pressure, a tourniquet or haemostatic packing gives the patient the best chance. In a team, airway management can happen at the same time.
When should tranexamic acid be given in trauma?
NICE NG39 recommends intravenous tranexamic acid as soon as possible for patients with major trauma and active or suspected active bleeding, and not more than 3 hours after injury unless there is evidence of hyperfibrinolysis. Many patients receive it from the ambulance service, so check before giving it again. Follow your local protocol for dosing.
What is an ATMIST handover?
ATMIST is a structured handover widely used by UK ambulance services for injured patients: Age, Time of incident, Mechanism of injury, Injuries found or suspected, Signs (vital signs and consciousness) and Treatment given, often with estimated arrival time. It is used for the pre-alert and the face-to-face handover.
What is the difference between the primary and secondary survey?
The primary survey rapidly identifies and treats immediate threats to life in a fixed order and is repeated whenever the patient changes. The secondary survey is a detailed head-to-toe examination and history to find all injuries once the patient is stable. A tertiary survey, usually within 24 hours, picks up injuries missed earlier.
Do all trauma patients need a cervical collar?
No. NICE NG41 moved UK practice away from routine rigid immobilisation of every patient. Clinicians assess the risk of spinal injury from the mechanism and clinical findings and use spinal motion restriction where it is indicated. Collars can cause harm, so follow your trauma network and ambulance service protocols.
Is permissive hypotension still used?
NICE NG39 recommends a restrictive approach to volume resuscitation in active bleeding until the bleeding is controlled, titrating to a palpable central pulse rather than a normal blood pressure. If traumatic brain injury dominates, a less restrictive approach helps maintain brain perfusion. These decisions need senior input.
Related courses
Trauma: Primary Survey and Initial Management
This course teaches a structured approach to the first hour of care for a seriously injured adult, based on UK practice and NICE major trauma…
Adult Advanced Life Support (UK Guidelines)
This course explains the recognition and management of adult in-hospital cardiac arrest, based on the current Resuscitation Council UK adult advanced…
Paediatric Life Support (UK Guidelines)
This course teaches the recognition of the seriously ill or injured child and the management of paediatric cardiorespiratory arrest, based on current…
Sources and further reading
- Major trauma: assessment and initial management (NG39). National Institute for Health and Care Excellence.
- Major trauma: service delivery (NG40). National Institute for Health and Care Excellence.
- Spinal injury: assessment and initial management (NG41). National Institute for Health and Care Excellence.
- Head injury: assessment and early management (NG232). National Institute for Health and Care Excellence.
- Adult advanced life support guidelines (2025), including traumatic cardiac arrest. Resuscitation Council UK.
Practitioner Insight is an independent education provider. It is not affiliated with or endorsed by the GMC, MPTS, NMC, HCPC, GPhC or any NHS organisation, and this information is not legal advice. If you have been referred to a regulator, speak to your defence organisation, trade union or legal representative.
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