Synopsis
Recognise physiological deterioration, treat the most immediate threat, and use repeated structured assessment to connect bedside findings with urgent action.
- Identify an airway or ventilation problem immediately; an oxygen saturation number cannot establish airway safety.
- Treat each life-threatening abnormality as it is found, then continue the assessment and return to reassess.
- Ask for experienced help early while assigning monitoring, vascular access, and documentation to other team members.
Reasoning priorities
Establish the physiological trajectory during treatment and transfer.
Attach ECG, oximetry and repeated blood-pressure measurement early. Motion and poor perfusion can distort readings, so a displayed number must be checked against the actual patient.
Worked reasoning
A postoperative adult is difficult to rouse, snores, breathes six times per minute, and has SpO2 95% while receiving oxygen.
- Interpret snoring as partial upper-airway obstruction and the low respiratory rate as inadequate ventilation; the saturation does not rule out dangerous carbon dioxide retention.
- Summon urgent help, open and support the airway, and provide assisted bag-mask ventilation with oxygen if breathing remains inadequate while monitoring is attached.
- Check glucose, pupils and the medication record in parallel. Recent opioid exposure supports toxicity, but persistent asymmetry, seizure activity or shock requires another explanation.
- Use appropriately titrated opioid reversal with experienced support when indicated, then verify sustained spontaneous ventilation, airway patency and improved conscious level before reducing assistance.
- Continue close observation because the opioid may outlast reversal, and arrange an explicit analgesia and monitoring plan instead of simply returning the patient to routine observations.
Key medicines
OxygenFor immediate critical illness, give oxygen through a reservoir mask, usually at 15 L/min, then titrate to SpO2 94–98%, or 88–92% where hypercapnic respiratory failure risk applies once reliable assessment is available.Oxygen does not correct obstructed air entry or inadequate ventilation; obtain blood gases when hypercapnia is possible and reduce unnecessary excess once a reliable target can be maintained.