Results
The literature search yielded 3406 returns. The PRISMA flow chart can be found in Figure 1 . With duplicates removed, 3305 were screened based on both titles and abstracts. In keeping with the above criteria, 3275 articles were excluded based on lack of relevance. Twenty-nine full-text articles were scrutinised for eligibility. Six were excluded: two review articles6,7 and four editorial/opinion pieces.8-11 One further study was identified from analysis of reference lists,12 resulting in a total of 24 articles meeting eligibility criteria.
Given the heterogeneity of the studies (Table 1 ), results were stratified into two broad themes: 1. aerosolisation of droplets during endonasal surgery, further subdivided into those which consider macroscopically visible droplets (1.1) and those which consider smaller particles (1.2), and 2. mitigation of risk.