Norepinephrine Intermittent Intravenous Boluses to Prevent Hypotension During Spinal Anesthesia for Cesarean Delivery: A Sequential Allocation Dose-Finding Study

The use of intermittent IV norepinephrine boluses to prevent spinal-induced hypotension in elective CD seems feasible and was not observed to be associated with adverse outcomes. Practically, we suggest an ED90 dose of 6 µg. Further work is warranted to elucidate the comparative effects of intermittent IV bolus doses of phenylephrine and norepinephrine, in terms of efficacy and safety.