Effect of IV Dexamethasone on Post-op Urinary Retention After Spinal Anesthesia

Intravenous administration of 8 mg dexamethasone sodium phosphate given as a single dose before surgery under spinal anesthesia. This corticosteroid is being evaluated for its potential to prevent postoperative urinary retention (POUR) by reducing inflammation and other perioperative effects.

Intravenous administration of 0.9% normal saline (placebo) given as a single dose before surgery under spinal anesthesia. This inert solution is used to compare against the active drug dexamethasone to determine its effect on postoperative urinary retention (POUR).