The effect of Pressure- or Volume- controlled ventilation on inflammatory factors of patients undergoing surgery with the novel coronavirus (COVID-19) pneumonia: protocol for a systematic review and meta-analysis

Objective During the COVID-19 pandemic, some patients with novel coronavirus pneumonia may have concurrent disease that must be accepted surgery. However, the extensive inflammatory response existed in this population, especially in the lungs. And various ventilation could affect the inflammation of lungs. Therefore, how to choose the ventilation mode to reduce the effect of mechanical ventilation on inflammation is an important clinical practice. We aim to investigate the effect of different ventilation modes on inflammatory factor levels of patients undergoing surgery with COVID-19 through this systematic review and meta-analysis. Methods and analysis This systematic review and meta-analysis have been registered in the International Prospective Register of Systematic Reviews (PROSPERO). The PubMed, Embase via Ovid, Chinese Biological Medical Database (CBM), China National Knowledge Infrastructure (CNKI), the Cochrane Central Register of Controlled Trials (CENTRAL) will be searched from inception to date to find relevant studies. In addition, the relevant literature was also hand-searched. Two searchers independently selected the studies, extracted data and assessed the quality of studies included. The Review Manager 5.4 software (The Cochrane library,Oxford,England) will be used for data synthesis and meta-analysis. Continuous variables were embodied by Weight Mean Differences with 95% confidence intervals (CI). Dichotomous outcomes were embodied by Odds ratio with 95%CI. Ethics and dissemination Ethical approval is not required because the data was collected from the published studies. Finally, the results of this systematic review will be published in a peer-reviewed journal. PROSPERO registration number CRD42021251937