The Efficacy of Scalp Block in Craniotomy

Fentanyl 1mcg/kg will be given before skin incision and Mayfield placement and followed up by fentanyl 1mcg/kg/hr, along the operation.

The scalp block procedure is performed with the patient in the supine position, utilizing surface landmarks for guidance. The local anesthetic is injected into the nerves after careful aspiration and under strict aseptic technique. The nerves that are typically injected include the supraorbital, supratrochlear, zygomaticotemporal, auriculotemporal, as well as the lesser and greater occipital nerves, with or without the inclusion of the third occipital nerve. The volume of 0.5% bupivacaine injected should not exceed 2 ml at each site.