Fisher Grading Scale for Subarachnoid Hemorrhage (SAH)
Rates risk of vasospasm in aSAH based on amount and distribution of blood on CT.
This scale only applies to aneurysmal subarachnoid hemorrhage (aSAH). We recommend using the Modified Fisher Grading Scale based on more recent studies.
Clinician must be able to identify subarachnoid hemorrhage (SAH) and major neuroanatomical landmarks on head CT.
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