Early Use of Norepinephrine in High-risk Patients Undergoing Major Abdominal Surgery: A Randomized Controlled Trial.

Summary

In high-risk major abdominal surgery, starting a titrated norepinephrine infusion at induction markedly reduced intraoperative hypotension and lowered the 30-day composite complication rate versus reactive ephedrine boluses. Pulmonary complications were also significantly fewer with norepinephrine.

Key Findings

• Titrated norepinephrine started at induction reduced intraoperative hypotension versus ephedrine (15% vs 74%; P<0.001).
• 30-day composite complications were lower with norepinephrine (44% vs 58%; RR 0.58, 95% CI 0.40–0.83; P=0.004).
• Pulmonary complications were significantly reduced with norepinephrine (17% vs 31%; RR 0.46, 95% CI 0.29–0.70; P<0.001).

Clinical Implications

Consider protocolized, titrated norepinephrine infusion starting at induction for older/high-risk patients undergoing major abdominal surgery to prevent hypotension and potentially reduce pulmonary and overall complications.

Limitations

• Single-center design may limit generalizability.
• Composite primary outcome mixes heterogeneous complications.

Future Directions

Multicenter pragmatic RCTs testing protocolized induction norepinephrine across diverse surgeries and risk strata; comparative effectiveness versus alternative vasopressors and closed-loop blood pressure management.