Dental patients and women in labour will be given ‘green gas and air’ at St George’s hospital, reducing pain on the planet as well as during childbirth and tooth extractions.

St George’s University Hospital is investing in a device in its dental unit dubbed the ‘catalytic converter of gas and air’.

Nitrous oxide, regularly combined with oxygen, to produce Entonox, provides sedation in dental and emergency procedures as well as pain relief in labour. The gas has almost 300 times the global warming potential of carbon dioxide.

The mobile nitrous oxide conversion unit at St George’s will be the first in the UK to be trailed in a dental department and breaks gas down into harmless oxygen and nitrogen before it is released, thereby reducing its impact on the environment as well as staff exposure to the medical gas.

It is already being used in St George’s endoscopy and the midwifery led birth unit.

Dr Emma Evans, South West London clinical lead for Net Zero and consultant anaesthetist at St George’s, said: “Patients won’t experience any difference in their clinical care and how they receive pain relief remains the same, but after its use, it will be disposed of through the device to breakdown the gas to be more environmentally friendly.

“After trialling mobile devices in the dental, endoscopy and midwifery led birth units, we will scope out the potential for a central system to service a larger number of clinical areas too, to further reduce our overall carbon footprint.”

Kate Slemeck, managing director for St George's University Hospitals NHS Foundation Trust, added:

“These devices eliminate 99% of the nitrous oxide that is released into the environment and their implementation plays a small but very important part in our overall green plan, paving the way for us to reduce our emissions.

“We all have a role to play in tackling climate change and St George’s is committed to playing its part in making the NHS the world’s first net zero health service.”

With more sustainable investments and interventions like these, we will reduce the rise in patients coming in with conditions exacerbated by air pollution such as asthma, cardiovascular disease (CVD), and lung cancer.

The introduction of these devices, which are made by Medclair, working in partnership with Ultraflow manufacturer BPR Medical, is the latest effort by St George’s to reduce its carbon footprint.

Managing director of BPR Medical, Richard Radford, added: “We are delighted to be working to provide a sustainable and environmentally friendly pain relief solution for patients at St George’s. The device handles exhaled nitrous oxide in a way that is both climate-friendly and convenient to the patient, while giving them safe and efficient pain relief.”

Chief executive of Medclair, Jonas Lundh, said: “It’s fantastic to see that more hospitals across the NHS are adopting nitrous oxide conversion systems. Scaled across the entire health service, this technology could reduce NHS nitrous oxide emissions by up to 75%.

“We are seeing more and more innovative efforts like this across the health service to tackle the global climate crisis.”