“…For the purpose of strict control in CPP, continuous ICP monitoring is essential. Several methods for noninvasive ICP monitoring have been proposed [14,17,[21][22][23], however, most of these methods cannot assess ICP continuously [17,[21][22][23] . Although ICP sensor insertion is defi nitely an invasive technique, Eddy et al [8] used fi beroptic ICP monitoring in 279 patients with head injury and reported that there were no complications resulting from ICP monitoring.…”