Neurology · Neurosurgery · Radiology

Fisher CT Group (Original) calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Original Fisher CT group

This is the original non-linear grouping system, not the modified Fisher scale; group 3 had the greatest vasospasm risk.

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Clinical inputs

Original Fisher CT group

Primary source

Fisher CM, Kistler JP, Davis JM. Relation of cerebral vasospasm to subarachnoid hemorrhage visualized by computerized tomographic scanning. Neurosurgery (1980)

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