Scalp Infiltration With Diprospan Plus Ropivacaine for Postoperative Pain After Craniotomy in Adults

Miscible liquid of diprospan and ropivacaine in this study will be peri-incisional scalp infiltration with 0.5 ml diprospan, 15 ml 1% ropivacaine and 14.5 ml normal saline miscible liquids for participants who will undergo elective craniotomy. The local infiltration solution containing will be infiltrated along the incision and throughout the entire thickness of the scalp before skin incision. The volume of local infiltration solution will be decided by surgeons according to the cut length, and the capacity of the solution will be recorded by investigator.

Miscible liquid of ropivacaine in this study will be peri-incisional scalp infiltration with 15 ml 1% ropivacaine and 15 ml normal saline miscible liquids for participants who will undergo elective craniotomy. The local infiltration solution containing will be infiltrated along the incision and throughout the entire thickness of the scalp before skin incision. The volume of local infiltration solution will be decided by surgeons according to the cut length, and the capacity of the solution will be recorded by investigator.