Can Different Intrathecal Drugs Affect Day Case Anal Surgery Recovery Duration?

A peripheral intravenous (IV) catheter will be inserted, and a 7 mL kg-1 crystalloid infusion will be initiated. The patients will be premedicated with 0.03 mg kg-1 midazolam IV. Heart rate and peripheral oxygen saturation (SpO2) will be monitored continuously; systolic, diastolic, and mean arterial pressure (MAP) will be measured noninvasively at 5 min intervals during the procedure and at 15 min intervals during the post anesthesia care unit (PACU) stay. The baseline values will be recorded. Nasal oxygen 2 L min-1 will be administered during the whole procedure