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Modified Fischer Score for SAH Vasospasm Risk Calculator

CT-based grade predicts delayed cerebral ischaemia.

Applies the Modified Fischer Scale to CT findings after subarachnoid haemorrhage: Grade 1 (thin SAH, no IVH) to Grade 4 (thick SAH with IVH). Higher grade → higher vasospasm risk.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Grade 1: thin SAH, no IVH; Grade 4: thick SAH + IVH.

In depth

Applies the Modified Fischer Scale to CT findings after subarachnoid haemorrhage: Grade 1 (thin SAH, no IVH) to Grade 4 (thick SAH with IVH). Higher grade → higher vasospasm risk.