Fisher Grade Calculator
Grade subarachnoid hemorrhage on CT scan using the Fisher scale to predict vasospasm risk.
How to Use
- Review CT scan findings.
- Select the appropriate Fisher grade.
- Click Calculate to see vasospasm risk.
Anwendungsfälle
- •SAH management and monitoring.
- •Vasospasm risk stratification.
- •Neurocritical care planning.
Formel
Fisher grades 1–4 based on CT appearance of subarachnoid blood. Higher grades correlate with greater vasospasm risk.
Häufig gestellte Fragen
What is the Fisher scale?
The Fisher scale grades SAH severity on CT scan from Grade 1 (no blood) to Grade 4 (intraventricular or intracerebral clot).
Which grade has the highest vasospasm risk?
Grade 3 (thick localized clot or diffuse thick SAH) carries the highest risk of symptomatic vasospasm (~37%).
Disclaimer
For educational purposes only. Does not replace professional medical evaluation.