Table 1 Barrow Neurological Institute (BNI) grading for pain of trigeminal neuralgia
From: Microvascular decompression for trigeminal neuralgia: an experience of 84 operated cases
Grade | Pain severity |
|---|---|
Grade I | No pain, no medication |
Grade II | Occasional pain, not requiring medication |
Grade IIIa | No pain but continued medication |
Grade IIIb | Pain present but adequately controlled on medication |
Grade IV | Pain present but not adequately controlled on medication |
Grade V | Severe pain despite medication |