A new pilot study has found abnormalities in the lungs of long Covid patients who had not experienced severe illness but experienced the symptom of breathlessness.
The Explain study used the gas xenon as part of MRI scans to investigate possible lung damage in the patients who had not been admitted to hospital, but continue to experience the symptom.
As part of the study patients were required to breathe in one litre of the gas which behaves similarly to oxygen in the lungs, so radiologists could observe how it moves from the lungs into the bloodstream.
The initial results of the study suggested there was significantly impaired gas transfer from the lungs to the bloodstream in the long Covid patients despite other tests including CT scans coming back as normal.