The Editor,

Sir,

Neurosurgery in the sitting position offers advantages for certain posterior fossa operations. However, these approaches are associated with potential complications, particularly venous air embolism (VAE), cerebral and myocardial ischaemia secondary to hypotension, and complications of the positioning itself (1).There is no study comparing the paramedian and median approaches for the risk of VAE. We aimed to find out the incidence of VAE according to the type of the surgical approach as paramedian and median incision.