Occipital Nerve Blockade for the Treatment of Occipital Neuralgia-Like Acute Postcraniotomy Headache: A Retrospective Study

Table 1

Barrow Neurological Institute pain inventory.

BNI degrees	Explanations
BNI I	No pain without medications
BNI II	Mild pain not requiring medications
BNI III	No or controlled pain with medications
BNI IV	Improved pain cannot be relieved by medications
BNI V	Persistent pain cannot be relieved by medications

BNI: Barrow Neurological Institute pain inventory.