A rare gas used as an inhaled anaesthetic
Xenon
A rare gas with anaesthetic properties used as an inhaled general anaesthetic in some settings, and as an imaging or research agent.
What is Xenon?
Xenon is a rare, naturally occurring gas that has anaesthetic properties when breathed in. In some specialist settings it is used as an inhaled general anaesthetic to keep a person unconscious and pain-free during surgery, and it is also used as an imaging and research agent. Its use is specialist and limited, partly because it is very expensive to produce. As an anaesthetic gas it must be given with careful monitoring, especially of the oxygen the person is breathing, by an anaesthetic team. It is given and supervised only by specialists.
Education and reference only. This is a plain-language guide to Xenon — it deliberately contains no doses. Doses depend on the person, the brand and the reason for treatment, and belong with your prescriber. Always check the BNF, the product labelling (SmPC) and follow medical advice.
What it is
Xenon is a colourless, odourless gas found in tiny amounts in the air, which has the unusual property of acting as a general anaesthetic when breathed in. It can be used to keep a person unconscious and free of pain during an operation, and it is also used in some imaging and research settings to study the lungs and the brain. Its use in anaesthesia is specialist and not widespread, mainly because it is rare and very expensive to obtain. When used as an anaesthetic it is always given by a trained anaesthetic team using specialised equipment with close monitoring.
How it works
Xenon produces anaesthesia by acting on the brain and nervous system to dampen down the signals that keep us awake and that carry pain, so a person becomes unconscious and does not feel the operation. Because it is breathed in and out, the depth of anaesthesia can be adjusted by changing the amount given, and the person wakes as it is cleared from the body through the lungs. A key practical point is that, because it is a gas the person breathes, the team must always make sure enough oxygen is being given at the same time, which is why careful monitoring is essential.
Company & origin
Originated / developed by: Specialist gas suppliers.
A rare gas used in some specialist settings in the UK as an inhaled general anaesthetic and as an imaging or research agent.
Practical use
How to take Xenon
General, dose-free guidance — always follow your prescriber's and the leaflet's specific instructions.
- It is given only by a trained anaesthetic team using specialised equipment, never by yourself.
- It is breathed in through anaesthetic equipment to send you to sleep and keep you comfortable during surgery.
- The team monitors the oxygen you are breathing very closely throughout, as it is given as a gas to inhale.
- Tell the anaesthetic team about your medical history and any previous problems with anaesthetics beforehand.
- Follow the usual instructions you are given before and after an anaesthetic.
Weighing it up
Advantages & disadvantages of Xenon
Advantages
- Acts as an effective inhaled general anaesthetic, keeping a person unconscious and pain-free during surgery.
- Tends to be gentle on the heart and circulation, which can be useful in some patients.
- Also useful as an imaging and research agent for studying the lungs and brain.
Disadvantages
- Its use is specialist and limited, and it is very expensive to produce.
- It needs specialised equipment and careful oxygen monitoring to use safely.
- It is not widely available for routine anaesthesia.
Practical use
Good to know
The main things to understand about xenon are that its use is specialist and limited, and that it is very expensive, which is one reason it is not used routinely despite some attractive features as an anaesthetic. When it is used to send someone to sleep for surgery, the most important practical point is the need for careful monitoring of the oxygen the person is breathing, because it is given as a gas to inhale; the anaesthetic team uses specialised equipment to keep oxygen levels safe throughout. As well as anaesthesia, xenon is used in some imaging and research settings, for example to study how the lungs and brain are working. It is only ever given and supervised by trained specialists.
Who should not take it / use with caution
- It is not used in situations where a person needs a high proportion of oxygen, as a gas anaesthetic limits how much oxygen can be given.
- It is used with care, and the anaesthetic team decides if it is suitable, in people with certain heart or lung conditions.
- It is only ever used by a trained anaesthetic team able to monitor breathing and oxygen closely.
Monitoring
- Close, continuous monitoring of the oxygen being breathed in and of oxygen levels in the blood.
- Monitoring of consciousness, breathing, heart rate and blood pressure throughout.
- Watching during recovery for the usual after-effects of a general anaesthetic.
Side effects
- Nausea or vomiting after the anaesthetic, as can happen with general anaesthetics.
- A risk of oxygen levels falling if monitoring is not careful, which is why it is closely watched.
- The usual after-effects of a general anaesthetic, such as drowsiness or feeling groggy.
Key interactions
- It is used together with other anaesthetic and pain medicines, all managed by the anaesthetic team.
- Tell the team about all your regular medicines before surgery, as some may need adjusting around an anaesthetic.
- The team takes account of anything that affects your breathing or oxygen levels.
Available as: A medical gas given by inhalation through specialised anaesthetic equipment.
Answers
Xenon: frequently asked questions
What is xenon used for?
It is a rare gas used in some specialist settings as an inhaled general anaesthetic for surgery, and also as an imaging and research agent for studying the lungs and brain.
Why is it not used routinely?
Its use is specialist and limited, partly because it is rare and very expensive to produce, and it needs specialised equipment to give safely.
Is it safe?
When used by a trained anaesthetic team with careful monitoring, particularly of the oxygen you are breathing, it can be used safely; it is never given without close supervision.
How is it given?
It is breathed in through anaesthetic equipment, with the team adjusting the amount and monitoring you closely throughout the operation.
Why does oxygen monitoring matter so much?
Because it is a gas you breathe, the team must make sure enough oxygen is given at the same time, so the oxygen you are breathing is monitored very carefully.
Authoritative sources
- BNF
- NICE CKS
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