Modified Fisher scale (subarachnoid hemorrhage)
Vasospasm risk from the CT pattern of subarachnoid blood.
Inputs
0 of 1CT findings
When to use
- Initial CT in aneurysmal SAH.
Pearls and pitfalls
- Thick SAH completely fills at least one cistern or fissure.
Why use
Better vasospasm prediction than the original Fisher scale.
| Criterion | Points |
|---|---|
| CT findings: No SAH or IVH | 0 |
| Thin SAH, no IVH | +1 |
| Thin SAH with IVH | +2 |
| Thick SAH, no IVH | +3 |
| Thick SAH with IVH | +4 |