ECMO in Refractory Septic Shock: Patient Selection, Timing and Hemodynamic Targets

Area of Science:

• Critical Care Medicine
• Cardiovascular Support
• Extracorporeal Life Support

Background:

• Septic shock is a leading cause of critical care mortality.
• Characterized by vasoplegia, myocardial depression, and circulatory collapse.
• Conventional therapies can be insufficient, leading to multi-organ failure.

Purpose of the Study:

• To review evidence on veno-arterial extracorporeal membrane oxygenation (V-A ECMO) for refractory septic shock.
• To explore the pathophysiological rationale, patient selection, timing, and hemodynamic management.
• To assess V-A ECMO's role as a salvage strategy.

Main Methods:

• Narrative review of current evidence.
• Focus on observational studies and registry analyses.
• Examination of pathophysiological rationale, patient selection, timing, and hemodynamic management.

Main Results:

• V-A ECMO may improve survival in septic cardiomyopathy (SCM).
• Reported survival rates: ~40% in adults, >50% in pediatrics.
• Early initiation, phenotype-guided selection, and hemodynamic titration are crucial.

Conclusions:

• The role of ECMO in septic shock is controversial.
• Should be limited to experienced centers and specific patient phenotypes.
• Further research needed for selection criteria, support strategies, and long-term recovery.