Fisher Grade SAH Calculator

Calculate modified Fisher grade (0-4) from CT findings to predict vasospasm risk after subarachnoid hemorrhage.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculate modified Fisher grade (0-4) from CT findings to predict vasospasm risk after subarachnoid hemorrhage

Each component has a specific meaning:

  • CT findings — The ct findings recorded for the scenario being assessed.

Note: Interpret the fisher grade sah result against the thresholds and context described above.

How to Use

Enter the CT findings for the scenario you are assessing. Calculate modified Fisher grade (0-4) from CT findings to predict vasospasm risk after subarachnoid hemorrhage. Use the fisher grade sah result to inform your calculation.

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Frequently Asked Questions