The aim of the study is to compare the effectiveness and safety of scalp block versus intravenous fentanyl in pain control intraoperatively in craniotomy patients. Most of the previous studies compared the effect of scalp block versus fentanyl or opioids in postoperative pain
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
intra-operative hemodynamic stability
Timeframe: intra-operatively