"Fisher scale grade 1"
"Fisher scale grade 2"
"Fisher scale grade 3"
"Fisher scale grade 4 (irrespective of presence of SAH)"
"Hunt and Hess grading system"
"WFNS grading system"
Expected headings
"Differences with the Fisher scale"
"It was modified from the original Fisher scale in 2006 1 to account for patients with thick cisternal blood and concomitant intraventricular haemorrhage. When using the modified Fisher scale, the risk of developing vasospasm progressively increases with each grade; in the original Fisher scale, the risk counterintuitively peaked at grade 3 and decreased for grade 4."
"Nonetheless, the Fisher scale and, more recently, the modified Fisher scale, preferred by many, are still widely used. It is essential to note that the latter is more than a mere refinement of the original description; therefore, it is important to specify which scale is used 7."