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Oxygen prescription and target saturation ⚠️ 🫁
Oxygen prescription and target saturation ⚠️ 🫁
Oxygen treats hypoxaemia, not breathlessness alone; excess inspired oxygen may aggravate hypercapnia in susceptible patients and mask worsening ventilation.
🔎 Recognise
Check respiratory rate, work of breathing, pulse oximetry, oxygen delivery device and whether the patient is at risk of type 2 respiratory failure.
🛟 First actions
For most acutely ill adults prescribe a target SpO₂ of 94–98%; for patients at risk of hypercapnic respiratory failure generally use 88–92% pending blood gas review and an individualised plan. Emergencies may require immediate oxygen before the prescription is written.
🧪 Investigations and reassessment
Record oxygen device, flow/concentration, target range and reassessment. Obtain blood gas analysis when hypercapnia or acidosis is suspected, and treat the underlying problem.
⚠️ Common pitfalls and escalation
A normal SpO₂ does not rule out hypercapnia, severe anaemia or carbon monoxide poisoning. Oxygen requirement is a clinical deterioration sign, not a diagnosis.
UK reference: BTS oxygen guideline. Focused editorial source check, 7 November 2026; this is not independent clinical or pharmacy sign-off. Verify current local policy, BNF/BNFC and specialist advice before treatment. Not a prescribing protocol.
Related guides: New oxygen requirement — FY quick guide ⚠️ 🫁 · Acute respiratory failure — FY quick guide 🚨 🫁
| The content on this website is provided for educational and informational purposes only to support exam preparation (e.g., MLA, MRCP, USMLE) and learning. This is NOT medical advice, diagnosis, treatment, or professional guidance. It does not replace consultation with a qualified healthcare professional, official guidelines (e.g., NICE, GMC, BNF), or supervised clinical practice. Always verify information with current, authoritative sources. Makindo and its contributors accept no liability for any reliance on this content, including errors, omissions, or any resulting harm, loss, or consequences. By using this site, you agree to these terms. |
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