INTRODUCTION:During a pandemic, medical personnel while in contact with patients with suspected/confirmed COVID-19 should wear full personal protective equipment (PPE) for aerosol-generating procedures to reduce the risk of infection. Most studies of intubation in level C PPE conditions have been relatively small. Our aim is to quantify the available data on success rates in order to provide an evidence-based benchmark to gauge performance in the published literature. MATERIAL AND METHODS:A structured literature search was performed with PubMed, Scopus, Embase, Web of Science, and Cochrane databases. The electronic database search was supplemented by searching Google Scholar and by back-searching the reference lists of identified studies for suitable articles. Data were evaluated and extracted by two independent reviewers on the basis of qualitative and quantitative variables of interest. Q statistic and I 2 statistics were used to assess the heterogeneity between the studies. RESULTS:Fifteen randomized controlled trials were included. The use of PPE during intubation as compared with intubation without PPE reduced intubation efficacy (90.0% vs. 97.9%; RR = 0.94; 95% CI: 0.90-0.99; p < 0.001) and increased the procedure time (MD = 7.73; 95%

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