RT Journal Article SR Electronic T1 Pneumomediastinum in COVID-19: a phenotype of severe COVID-19 pneumonitis? The results of the UK POETIC survey JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 2102522 DO 10.1183/13993003.02522-2021 VO 60 IS 3 A1 James Melhorn A1 Andrew Achaiah A1 Francesca M. Conway A1 Elizabeth M.F. Thompson A1 Erik W. Skyllberg A1 Joseph Durrant A1 Neda A. Hasan A1 Yasser Madani A1 Prasheena Naran A1 Bavithra Vijayakumar A1 Matthew J. Tate A1 Gareth E. Trevelyan A1 Irfan Zaki A1 Catherine A. Doig A1 Geraldine Lynch A1 Gill Warwick A1 Avinash Aujayeb A1 Karl A. Jackson A1 Hina Iftikhar A1 Jonathan H. Noble A1 Anthony Y.K.C. Ng A1 Mark Nugent A1 Philip J. Evans A1 Robert A. Hastings A1 Harry R. Bellenberg A1 Hannah Lawrence A1 Rachel L. Saville A1 Nikolas T. Johl A1 Adam N. Grey A1 Huw C. Ellis A1 Cheng Chen A1 Thomas L. Jones A1 Nadeem Maddekar A1 Shahul Leyakathali Khan A1 Ambreen Iqbal Muhammad A1 Hakim Ghani A1 Yadee Maung Maung Myint A1 Cecillia Rafique A1 Benjamin J. Pippard A1 Benjamin R.H. Irving A1 Fawad Ali A1 Viola H. Asimba A1 Aqeem Azam A1 Eleanor C. Barton A1 Malvika Bhatnagar A1 Matthew P. Blackburn A1 Kate J. Millington A1 Nicholas J. Budhram A1 Katherine L. Bunclark A1 Toshit P. Sapkal A1 Giles Dixon A1 Andrew J.E. Harries A1 Mohammad Ijaz A1 Vijayalakshmi Karunanithi A1 Samir Naik A1 Malik Aamaz Khan A1 Karishma Savlani A1 Vimal Kumar A1 Beatriz Lara Gallego A1 Noor A. Mahdi A1 Caitlin Morgan A1 Neena Patel A1 Elen W. Rowlands A1 Matthew S. Steward A1 Richard S. Thorley A1 Rebecca L. Wollerton A1 Sana Ullah A1 David M. Smith A1 Wojciech Lason A1 Anthony J. Rostron A1 Najib M. Rahman A1 Rob J. Hallifax YR 2022 UL http://erj.ersjournals.com/content/60/3/2102522.abstract AB Background There is an emerging understanding that coronavirus disease 2019 (COVID-19) is associated with increased incidence of pneumomediastinum (PTM). We aimed to determine its incidence among patients hospitalised with COVID-19 in the UK and describe factors associated with outcome.Methods A structured survey of PTM and its incidence was conducted from September 2020 to February 2021. UK-wide participation was solicited via respiratory research networks. Identified patients had severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and radiologically proven PTM. The primary outcomes were to determine incidence of PTM in COVID-19 and to investigate risk factors associated with patient mortality.Results 377 cases of PTM in COVID-19 were identified from 58 484 inpatients with COVID-19 at 53 hospitals during the study period, giving an incidence of 0.64%. Overall 120-day mortality in COVID-19 PTM was 195 out of 377 (51.7%). PTM in COVID-19 was associated with high rates of mechanical ventilation. 172 out of 377 patients (45.6%) were mechanically ventilated at the point of diagnosis. Mechanical ventilation was the most important predictor of mortality in COVID-19 PTM at the time of diagnosis and thereafter (p<0.001), along with increasing age (p<0.01) and diabetes mellitus (p=0.08). Switching patients from continuous positive airway pressure support to oxygen or high-flow nasal oxygen after the diagnosis of PTM was not associated with difference in mortality.Conclusions PTM appears to be a marker of severe COVID-19 pneumonitis. The majority of patients in whom PTM was identified had not been mechanically ventilated at the point of diagnosis.Roughly 0.6% of patients admitted with COVID-19 have pneumomediastinum identified. The finding is associated with severe COVID-19 and high mortality. https://bit.ly/3nXlaR5