Recognising Head Injury Deterioration for Student Nurses
Learn how to recognise concerning neurological changes after a head injury, compare findings with the patient's baseline and understand why deterioration requires urgent escalation.
Head injury can evolve over time
Following head trauma, neurological deterioration may occur because of evolving injury within the skull. Your role is not to diagnose the cause, but to recognise changes early and escalate concerns promptly.
Know what was normal
Earlier neurological observations provide an important comparison when deciding whether the patient is changing.
Look for deterioration
A worsening trend may be more important than a single isolated observation.
Act on new changes
New neurological abnormalities after head injury require prompt reassessment and escalation.
Signs of possible neurological deterioration
Increasing drowsiness
A patient becoming more difficult to wake or less responsive than previously is concerning.
Falling neurological score
A reduction from the patient's previous Glasgow Coma Scale findings should prompt urgent reassessment.
New pupil changes
New asymmetry, altered size or a change in reaction can be an important neurological finding.
New limb weakness
Reduced movement or new weakness affecting an arm or leg requires urgent attention.
Worsening symptoms
A worsening or significant new headache after injury should be considered alongside the wider neurological picture.
New or repeated vomiting
Vomiting following head injury can form part of a concerning deterioration pattern.
A finding becomes particularly important when it is new, worsening or different from the patient's previous neurological assessment.
Look beyond consciousness alone
- New confusion or unusual behaviour.
- Increasing agitation or restlessness.
- New difficulty speaking or understanding.
- New facial asymmetry.
- New one-sided weakness.
- New seizure activity.
- New balance or coordination problems.
- Increasing difficulty waking the patient.
- Rapidly changing neurological observations.
Compare findings over time
Repeated neurological observations are valuable because they allow clinicians to identify change. The precise observation schedule should follow the local head injury pathway and clinical plan.
Compare responsiveness
Is the patient as alert and responsive as they were previously?
Record the components
Document eye, verbal and motor responses as well as the total where GCS is being used.
Compare size and reaction
Look for new differences in pupil size, symmetry or response.
Compare both sides
Notice new weakness or asymmetry in limb movement.
Listen for change
New slurring, language difficulty or altered responses may indicate neurological deterioration.
Ask what has changed
Headache, nausea, vomiting, visual changes or other new symptoms can contribute to the overall picture.
Neurological deterioration still requires ABCDE
Airway
Reduced consciousness can compromise airway protection. Assess airway patency and escalate immediately if there is concern.
Breathing
Assess respiratory rate, oxygen saturation, respiratory pattern and work of breathing.
Circulation
Assess pulse, blood pressure, perfusion and the wider cardiovascular picture.
Disability
Assess consciousness, GCS where appropriate, pupils, limb movement, speech and blood glucose according to local practice.
Exposure
Look for other injuries or clinical findings while maintaining the patient's dignity.
Escalate
New or worsening neurological findings following head injury require prompt senior clinical review.
Connect deterioration with the wider neurological picture
Neurological deterioration after head injury can be associated with increasing pressure within the skull. No single observation diagnoses raised intracranial pressure, so assess the pattern and trend.
Recognising change after a head injury
Example
A patient was admitted following a fall and head injury. Earlier they were awake, speaking normally and moving all four limbs.
During a later assessment you notice that they are much more drowsy and need repeated prompting to respond.
Their left pupil now appears larger than previously and their right arm movement seems weaker.
You recognise the pattern: new drowsiness + pupil change + focal weakness after head injury.
You immediately reassess using ABCDE, compare the neurological findings with previous observations and escalate the deterioration according to the local emergency pathway.
State what has changed from baseline
Example escalation
“I'm concerned that Mr Patel is deteriorating following his head injury. Earlier he was alert with equal pupils and equal limb movement. He is now much more drowsy, his left pupil appears larger and his right arm is weaker.”
This communicates the baseline, neurological change and progression clearly.
Head injury assessment errors to avoid
- Assuming the patient is safe because they initially looked well.
- Looking only at the total GCS rather than individual changes.
- Ignoring a new pupil difference.
- Failing to compare current limb movement with previous findings.
- Attributing increasing drowsiness automatically to tiredness.
- Waiting for several abnormalities before escalating.
- Failing to communicate the previous neurological baseline.
- Looking at neurological observations without assessing the patient using ABCDE.
Observe → compare → connect → escalate
Look for neurological change
Notice consciousness, pupils, movement, speech, symptoms and behaviour.
Use the previous baseline
Ask what has changed and whether several findings form a concerning deterioration pattern.
Report deterioration promptly
Clearly describe what the patient was like before and what is different now.
Build confidence recognising neurological deterioration
Head injury assessment brings together consciousness, GCS, pupils, limb strength, speech and neurological trends — helping you recognise when a patient's condition is changing.
Explore Clinical Confidence →