Synopsis
Perform reproducible neurological observations, interpret component-level Glasgow Coma Scale change, and escalate deterioration without allowing a reassuring total to conceal a dangerous focal trend.
- Record GCS as E, V and M components with the observed response and any test limitation; a total alone cannot show which function changed.
- Compare serial observations with the patient’s own documented baseline, operative side, sedation, airway status and previous pupils rather than relying on one isolated score.
- Confirm an unexpected change promptly with the same structured stimulus, then escalate and investigate the cause; do not wait for a scheduled round.
Key red flags
A fall in any eye, verbal or motor component is clinically relevant even when the summed GCS remains above an arbitrary referral threshold.
New pupil inequality, impaired reactivity, gaze deviation or unilateral weakness can precede a large change in total GCS and requires immediate reassessment.
Failure to return toward the documented post-anaesthetic baseline demands evaluation for residual drugs, hypercapnia, hypoxia, hypotension, metabolic disturbance, seizure and intracranial complications.
Agitation, restlessness or reduced cooperation may be the earliest visible deterioration; do not label behaviour until physiological and neurological causes have been checked.
Test command following before applying pressure; distinguish purposeful localisation from flexion withdrawal, abnormal flexion, extension and no movement, while comparing sides.
Record size and direct reactivity in each eye under comparable conditions. A new asymmetry or declining reaction is an urgent focal sign even with stable GCS.
Reasoning priorities
Confirm the component, pupil or limb change and exclude inconsistent technique.
A reproducible fall or focal change is deterioration; a transient apparent difference still needs its testing limitation and cause documented.
Worked reasoning
Two hours after extubation, a patient changes from E4 V5 M6 to E3 V4 M6 and develops a larger sluggish pupil.
- Context: repeat E, V and M with pupils and lateralised limb findings, check the airway, oxygenation, ventilation, blood pressure and glucose, and review recent analgesia or sedation. Routine observation frequency follows the responsible neurosurgical protocol and reflects the operation and current acuity; any deterioration overrides that timetable.
- Reasoning: the component fall plus new pupil change is confirmed neurological deterioration; postoperative drugs remain a differential but cannot safely explain a focal sign.
- Outcome: summon senior and neurosurgical review immediately, stabilise physiology and obtain urgent CT using the local emergency pathway while preparing for definitive treatment.
- Verification: record times, component scores, pupils, interventions and imaging decision, then continue close observations to show response or further decline.