Dexmedetomidine as an Adjuvant to Bupivacaine in Scalp Block vs Bupivacaine Alone for Hemodynamics Stability in Craniotomy

In Group SB: (LA) was done by 20ml of Bupivacaine 0.25%. maximal dose of Bupivacaine did not exceed (2.5 mg/kg) Scalp nerve block will be done by anesthesiologist who is blind to the drug being injected and under complete septic condition where local infiltration of local anesthetic (LA) will be done guided by bony superficial landmarks to block the supraorbital, supratrochlear, auriculotemporal, occipital, and post auricular branches of the greater auricular nerves

local infiltration of total volume 20ml which include (Bupivacaine 0.25%. + Dexmedetomidine 1mcg/kg) was done Dexmedetomidine preparation was done by 2ml (200 mcg) diluted by 18 ml normal saline in 20 ml syringe as 1ml was contain 10 mcg and injected at same points as above