BNI Classification

Last edit by Alaric Steinmetz on

Synonyms: BNI Grading

The BNI (Barrow Neurological Institute) classification for subarachnoid hemorrhages was first described in 2012[^1]​ and relates the imaging extent of a subarachnoid hemorrhage to the risk of developing vasospasms.

Classification

BNI grade

Maximum SAH layer thickness (mm)

Incidence of symptomatic vasospasms (%)

BNI grade 1

No subarachnoid hemorrhage visible on imaging

0

BNI grade 2

≤ 5

12.5

BNI grade 3

>5 to 10

21.6

BNI grade 4

>10 to 15

29.6

BNI grade 5

>15

50

Article information

Article created by
Last edited:
on
Revision history
Show revision history (2)

2 edits by 1 author

Edit · Alaric Steinmetz ·

No content change recorded

Article created on · Alaric Steinmetz

Author list: