A medical gas used in keyhole surgery and some breathing situations
Carbon dioxide
A medical gas used mainly to inflate the abdomen during keyhole surgery, and in some breathing situations, used only by specialists.
What is Carbon dioxide?
Carbon dioxide is a medical gas used in hospital, most commonly to gently inflate the abdomen during keyhole (laparoscopic) surgery so the surgeon has room to work and a clear view. It is also used in some breathing situations and occasionally added to oxygen for particular purposes. It is used only by trained specialists such as surgeons and anaesthetists in controlled conditions. The main concern is that too much carbon dioxide can cause drowsiness, headache and a raised acidity of the blood, so the amount used is carefully controlled and the patient is monitored throughout.
Education and reference only. This is a plain-language guide to Carbon dioxide — 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
Carbon dioxide is a gas that the body naturally produces and breathes out, but in its medical form it is supplied as a pure gas for use in hospitals. Its best-known medical use is in keyhole (laparoscopic) surgery, where it is gently pumped into the abdomen to create space and a clear view for the surgeon's instruments and camera. It is also used in some specialised breathing situations and is sometimes added in small amounts to oxygen for particular purposes. It is not a medicine people take themselves; it is used only by trained specialists in a controlled, monitored setting.
How it works
In keyhole surgery, carbon dioxide is used because it is readily absorbed by the body and does not catch fire, making it safe to fill the abdomen and give the surgeon room to operate; afterwards the body simply breathes the gas off. In breathing situations, adjusting carbon dioxide can influence how fast and deeply a person breathes and how blood vessels respond. Because the body is very sensitive to carbon dioxide levels, the amount used is carefully controlled, since too much shifts the blood towards being too acidic and affects the brain and breathing.
Company & origin
Originated / developed by: Medical gas suppliers.
A medical gas used in UK hospitals, mainly to inflate the abdomen during keyhole surgery and in some breathing situations.
Practical use
How to take Carbon dioxide
General, dose-free guidance — always follow your prescriber's and the leaflet's specific instructions.
- It is used by trained specialists in hospital, not something you take yourself.
- In keyhole surgery it is gently pumped into the abdomen by the surgical team to create space to operate.
- The amount used and the patient's breathing and gas levels are carefully monitored throughout.
- Expect possible shoulder-tip or tummy discomfort for a day or two after keyhole surgery as leftover gas is absorbed.
- Tell the team about any breathing or lung conditions before a procedure, as these affect how the gas is managed.
Weighing it up
Advantages & disadvantages of Carbon dioxide
Advantages
- Allows keyhole surgery by safely inflating the abdomen to give the surgeon room and a clear view.
- Readily absorbed and breathed off by the body afterwards, and does not catch fire.
- Useful in certain specialised breathing situations under expert control.
Disadvantages
- Too much can cause drowsiness, headache and a rise in the blood's acidity.
- Can cause temporary shoulder-tip or tummy discomfort after keyhole surgery.
- Used only by specialists in hospital with monitoring, not by patients themselves.
Practical use
Good to know
The main thing to understand is that carbon dioxide is a tool used by specialists rather than a treatment patients take, so it is always used in hospital under close monitoring. In keyhole surgery, a common and temporary after-effect is shoulder-tip or tummy discomfort caused by leftover gas irritating the lining of the abdomen and the nerves nearby; this usually settles within a day or two as the body absorbs the remaining gas. The key safety concern is that too much carbon dioxide in the body causes drowsiness, headache, flushing and a rise in the blood's acidity, which is why levels are watched carefully during procedures. Because it is used in such controlled circumstances, serious problems are uncommon, but the anaesthetic and surgical teams monitor breathing, heart rhythm and gas levels throughout.
Who should not take it / use with caution
- It is used with particular caution in people with serious breathing or lung conditions, who may be more affected by changes in carbon dioxide.
- Its use in keyhole surgery is judged carefully in people with certain heart or lung problems.
- It is used only by trained specialists in a controlled, monitored setting.
Monitoring
- Monitoring breathing, heart rhythm and gas levels throughout any procedure.
- Watching for signs of too much carbon dioxide, such as drowsiness or a rise in blood acidity.
- Reviewing recovery after keyhole surgery, including any leftover-gas discomfort.
Side effects
- Temporary shoulder-tip or tummy discomfort after keyhole surgery as leftover gas is absorbed.
- Drowsiness, headache or flushing if there is too much carbon dioxide in the body.
- A rise in the blood's acidity and effects on breathing and heart rhythm if levels are not controlled.
Key interactions
- Its effects are managed alongside the anaesthetic medicines and the patient's own breathing during surgery.
- Existing breathing or lung conditions can change how the body handles it, so the team takes these into account.
- There are few routine medicine interactions, as it is used under close specialist control.
Available as: A medical gas supplied for hospital use.
Answers
Carbon dioxide: frequently asked questions
What is carbon dioxide used for in medicine?
It is most commonly used to inflate the abdomen during keyhole surgery so the surgeon has room and a clear view; it is also used in some breathing situations and occasionally added to oxygen.
Why does my shoulder hurt after keyhole surgery?
Leftover carbon dioxide gas can irritate the lining of the abdomen and nearby nerves, causing shoulder-tip or tummy discomfort that usually settles within a day or two.
Is it safe?
Used by specialists under monitoring it is generally safe, but too much carbon dioxide can cause drowsiness, headache and a rise in the blood's acidity, so levels are carefully controlled.
Why carbon dioxide rather than another gas for surgery?
Carbon dioxide is readily absorbed by the body and does not catch fire, making it well suited to safely inflating the abdomen during keyhole surgery.
Can I be given it at home?
No. It is a medical gas used only by trained specialists in hospital under close monitoring, not something used at home.
Authoritative sources
- BNF
- NICE CKS
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