Evaluation of spirometry and 6-minute walk test in post COVID-19 pneumonia patients at 6 months follow up

ABSTRACT

Background: The COVID-19 pandemic is an ongoing global health care challenge. Upto 1/3rd of hospitalised patients develop severe pulmonary complications and ARDS. Our study aims to evaluate the pulmonary function in COVID-19 pneumonia patients at 6 months follow up. Methods: Prospective cohort study in 30 hospitalised patients with a confirmed diagnosis of COVID-19 pneumonia;belonging to mild, moderated, severe categories - 6 months after discharge. The study consists of assessing the pulmonary function with pre and post bronchodilator spirometry and 6-minute walking test for post exercise desaturation. Results: Lung function test results showed 27% patients had a normal FEV1/FVC ratio with reduction in FVC (forced vital capacity). The mean basal saturation before the 6-MWT was 96+ or - 2%. Exercise oxygen desaturation was observed in 6% cases. Conclusion: This study shows that post infection with SARS-CoV-2, severe or critical covid-19 pneumonia patients showed higher prevalence of abnormal spirometry , with a mainly restrictive pattern when compared to non severe pneumonia patients.