The new technology has arisen through a collaboration between Professor Peter Robbins in the Department of Physiology, Anatomy and Genetics and Professors Grant Ritchie and Gus Hancock in the Department of Chemistry.
It combines laser spectroscopy and precise flow measurement of breath in a single medical device which fits into a standard ventilation tube.
The work has received public funding from the NIHR Oxford Biomedical Research Centre and the Medical Research Council.
Professor Peter Robbins, who is directing the research, said: “This is the culmination of many years of development and it has finally come to fruition.
“It is exciting for us to be able to offer something to doctors that has the potential to improve significantly the care of very sick patients.”
Patients in shock suffer a lack of oxygen throughout the body, causing many of their organs to deteriorate and eventually even stop working altogether.
The possible underlying causes of shock include heart attack, haemorrhage, and sepsis. Common treatments include drugs, oxygen, and blood transfusions.
Doctors do not at present have any direct way of measuring how much oxygen is being used by the body, making it difficult for them to judge which treatments are likely to be most beneficial.
Tests in healthy volunteers and in patients having anaesthetics at Oxford’s John Radcliffe Hospital indicate the precision of the device is better than anything previously achieved. The results are published today in Science Advances.
Stuart McKechnie, Consultant in Intensive Care at the John Radcliffe Hospital, said “Though we already monitor critically-ill patients very closely, this device promises to provide highly useful additional information that may help us to care better for patients with sepsis and shock in the future.”
The device is now being used as part of a further study in the Intensive Care units within Oxford University Hospitals NHS Foundation Trust, which runs the John Radcliffe Hospital.