Pre-emptive Topical Lidocaine 5% Plaster for Prevention of Post-craniotomy Pain

Postcraniotomy pain remains a common phenomenon in the neurosurgery field. Insufficient control of postcraniotomy pain may lead to unexpected clinical outcomes. The current management for postcraniotomy pain mainly involves systemic intravenous or oral medication and regional anaesthetic injection. The investigators intend to compare pre-emptive lidocaine 5% plaster incision covering to a placebo for prophylaxis of postcraniotomy pain. In the proposed study, the effectiveness and safety of lidocaine 5% plaster for postcraniotomy pain control will be examined compared with those of placebo. The investigators aim to provide a novel regional non-invasive prophylactic strategy for postcraniotomy pain.