Researchers in the UK have identified persistent damage to lungs in COVID-19 patients at least three months after they were discharged from hospital, and in some cases the duration is even longer. The study, conducted by Sheffield and Oxford researchers using a cutting-edge method of imaging, said the damage was not detected by routine CT scans and clinical tests, and the patients would consequently normally be told their lungs are normal. Early research by the team has shown that patients who have not been hospitalised with COVID-19 but who are experiencing long-term breathlessness may have similar damage in their lungs, and a larger study is needed to confirm this, a release by the Sheffield University said on May 26. In a paper published in Radiology, the world’s leading radiology journal, the researchers from the University of Sheffield and the University of Oxford said that hyperpolarised xenon MRI (XeMRI) scans had found abnormalities in the lungs of some COVID-19 patients more than three months and in some cases, nine months – after leaving hospital, when other clinical measurements were normal. Lead author of the study, Professor Jim Wild, Head of Imaging and NIHR Research Professor of Magnetic Resonance at the University of Sheffield, said, “the findings of the study are very interesting. The 129 Xe MRI is pinpointing the parts of the lung where the physiology of oxygen uptake is impaired due to long standing effects of COVID-19 on the lungs, even though they often look normal on CT scans. It is great to see the imaging technology we have developed rolled out in other clinical centres, working with our collaborators in Oxford on such a timely and clinically important study sets a real precedent for multi-centre research and NHS diagnostic scanning with 129Xe MRI in the UK,” the release quoted him as saying.
Source: PTI