Midazolam Efficacy/Safety in Pre-Eclamptic C-Section Sedation

"* Intravenous administration of volume-matched normal saline (0 mg/kg midazolam equivalent)~* Administered as single bolus prior to epidural anesthesia~* Served as active comparator for dose-response evaluation"

"* Intravenous midazolam at 0.01 mg/kg (diluted in normal saline)~* Administered as single bolus over 2 minutes~* Manufacturer: Jiangsu Enhua Pharmaceutical Co., Ltd. (Approval H19990027)"

"* Intravenous midazolam at 0.02 mg/kg~* Identical administration protocol as 0.01 mg/kg group~* Primary focus: Intermediate dose efficacy/safety assessment"

"* Intravenous midazolam at 0.03 mg/kg (maximum tested dose)~* Special hemodynamic monitoring due to dose-dependent MAP effects~* Primary focus: Optimal dose determination"