Consensus on decommissioning piped nitrous oxide from UK and Ireland operating theatre suites
A rational approach to an increasingly ignoble gas
Anaesthesia
Submitted March 2025 by Dr Louisa Swain
Summary
This editorial summarises the context and evidence for the release of the July 2024 Consensus statement of the Association of Anaesthetists, Royal College of Anaesthetists, College of Anaesthesiologists of Ireland, Association of Paediatric Anaesthetists of Great Britain and Ireland and the Obstetric Anaesthetists’ Association, that piped nitrous oxide (N20) should no longer be considered essential and that healthcare institutions should decommission their piped supply systems and/or where nitrous oxide is deemed still to be clinically required, move to more efficient methods of supply, such as cylinders.
The consensus statement recommendations are that N20 should no longer be considered essential in modern practice, and that pipeline supply in not essential. Timely decommissioning of pipelines, with cylinder use where required is suggested, and Trusts are advised to liaise early with suppliers, so that supply to areas still requiring N20 use is uninterrupted.
Nitrous oxide use, pharmacokinetics and environmental issues are described in detail as well as the reported leakage of >90% at many European centres. The authors include a brief discussion of its use in modern practice and describe a stepwise approach to N20 mitigation. The editorial also considers the challenges to implementation, and other considerations including nitrous “cracking” technology, and the issue of industry venting.
Commentary
This editorial covered the many challenging aspects of decommissioning nitrous oxide pipelines along with guidance on why this is required and how to undertake the process. It had interesting points on the importance of medical body support, strategies for success and discussions points on environmentally friendly anaesthesia, changes to modern practice and future considerations. While the editorial focuses on European/UK based decommissioning, it should be noted that this is timely, and highly relevant to Australasian practice.
