Cyanosis and low oxygen saturation
Treat possible hypoxaemia as a clinical problem, not simply a colour or monitor reading.
Clinical learning outcomes: Awaiting named clinical review.
What you should learn
- Recognise respiratory or circulatory concern and escalate.
- Discuss the reliability of the reading and an appropriate oxygen plan.
Recognise and explain
- Examination, perfusion, monitoring and the clinical history must be interpreted together.
On your placement
Agree the activity and supervision with the clinical team. For patient-facing learning, seek permission and respect the patient’s comfort and care needs.
- Check a saturation reading and assess the patient with a clinician.
- Examine for respiratory and cardiovascular findings.
- Review the oxygen target and whether a blood gas or other test is needed.
The breathlessness lesson provides a respiratory-compromise case, not every cause of cyanosis or a low reading.
Start here
MLA: assess, act and reassess
Recognise respiratory compromise and communicate urgency.
MLA: respiratory examination
Review relevant respiratory observations and examination findings.
Current guidance
BTS oxygen guidance
Focus on choosing an oxygen target, monitoring and reassessment; discuss the patient’s risks before selecting a target.
Discuss
Assessing acute breathlessness
Recognise respiratory compromise and compare acute heart failure with pneumothorax without relying on age or a single measurement.
On your next shift
Explain a difference between the monitor reading and the bedside assessment.
How this relates to GMC graduate outcomes and the MLA
These are St Emlyn’s learning connections, not a claim that this page covers every national requirement.
Presentations and conditions: Cyanosis.
Clinical and professional capabilities: Assessment and clinical reasoning; Recognising limits and seeking help.
Practical skills: Oxygen administration; Physiological observations.
St Emlyn’s interpretation of relevant GMC graduate outcomes and MLA themes; these are summary labels, not official topic codes or a complete curriculum.
Explore the student placement programme
Student practice and graduate expectations
About this resource and its review
A St Emlyn’s guide to learning Emergency Medicine during undergraduate placements. It is not an official medical-school or GMC curriculum. Your medical school’s curriculum and assessment requirements take precedence.
National foundations: GMC Outcomes for Graduates, the practical-skills supplement and the MLA content map applying from September 2026.
Framework checked: 8 October 2026. This is a source check, not clinical sign-off.
Clinical learning outcomes: awaiting named clinical review.
The four learning routes are St Emlyn’s groupings. The six interconnected MLA domains remain part of the official content map.