Fig. 2. Number of hypotension and venous air embolism (VAE) episodes according to cranial suture involved in surgical repair (mean ± SEM). The cranial suture involved in surgical repair is designated on the x -axis. Proceeding from left to right for each cranial suture is the median number of episodes of VAE per hour, total number (median) of VAE episodes, the median grade of VAE, the median number of hypotension episodes (with or without VAE) per hour, and the total number of hypotension episodes (with or without VAE).