Synopsis
Recognise and manage time-critical illness in homes, surgeries and community settings by stabilising immediate threats, summoning appropriate help and transferring care without avoidable delay.
- Make the scene safe, use personal protective equipment where indicated, confirm exact location and call for help early; a lone clinician should use speakerphone while continuing assessment.
- Use ABCDE, treating a life-threatening problem as it is found before moving on, then repeat the sequence after each intervention or clinical change.
- Do not delay 999 transfer to finish a full history, obtain routine tests or reach a precise diagnosis when physiology or a high-risk pattern already mandates emergency care.
Key red flags
Threatened airway, stridor, inability to speak normally, central cyanosis or severe respiratory distress requires immediate emergency response.
New confusion, reduced consciousness, seizure, focal neurological deficit, collapse or rapidly worsening severe pain may signal time-critical neurological, vascular or systemic disease.
Hypotension, mottled or ashen skin, prolonged capillary refill, weak pulse, major haemorrhage or rapidly deteriorating observations indicate shock until proved otherwise.
Suspected sepsis with any NICE high-risk criterion in a person aged 16 or over requires emergency referral, usually by 999 ambulance, rather than delayed community investigation.
Children, pregnant or recently pregnant people, frail older adults, immunosuppressed people and those unable to communicate may deteriorate with atypical signs and need a lower threshold for escalation.
Stridor, silent chest, exhaustion, central cyanosis, inability to speak, falling consciousness or severe work of breathing needs immediate 999 support and ABCDE treatment.
Cool mottled skin, weak pulse, delayed refill, hypotension, major bleeding or altered mentation signals impaired perfusion even before a cause is established.
New focal deficit, seizure, sudden severe headache, confusion or reduced consciousness requires glucose assessment and emergency disposition matched to the presentation.
Use the current age and pregnancy-specific NICE criteria; high-risk adult findings in the community require emergency medical referral, usually by 999 ambulance.
Reasoning priorities
Identify and treat life-threatening physiology in priority order.
Treat each critical finding before moving on and repeat the sequence after interventions, transfer decisions or deterioration.
Worked reasoning
A 72-year-old becomes pale and unresponsive for about twenty seconds, then wakes confused with a weak rapid pulse and chest discomfort.
- Call 999, bring the defibrillator and emergency equipment, position safely and assess Airway and Breathing while a colleague records times and obtains the patient record.
- Continue Circulation, Disability and Exposure: control any bleeding, obtain pulse, pressure, saturation, respiratory rate, glucose and ECG only if it does not delay care; treat life-threatening findings within competence.
- The final action is emergency transfer because collapse, ongoing chest discomfort, confusion and abnormal circulation create an unstable time-critical presentation; the patient must not self-transport.
- Repeat ABCDE, record trends and treatment response, then verify transfer with an SBAR handover containing onset, loss-of-consciousness duration, observations, ECG if obtained, medicines and allergies, interventions and exact times.
No immediate instability is found, but diagnosis or trajectory could worsen before routine review.