Risk factors for refractory septic shock treated with VA ECMO

Area of Science:

• Critical Care Medicine
• Cardiovascular Surgery
• Intensive Care Unit Management

Background:

• Refractory septic shock presents a significant clinical challenge with high mortality rates.
• Evidence supporting extracorporeal membrane oxygenation (ECMO) in adult septic shock remains limited.
• This study investigates outcomes and prognostic factors in patients with refractory septic shock treated with ECMO.

Purpose of the Study:

• To evaluate the outcomes of adult patients with refractory septic shock undergoing venoarterial ECMO.
• To identify clinical and laboratory parameters associated with survival in this patient population.
• To explore the prognostic value of central venous oxygen saturation (ScvO2%) during ECMO.

Main Methods:

• A retrospective analysis of 23 adult patients with refractory septic shock treated with venoarterial ECMO.
• Comparison of clinical and laboratory parameters between survival and death groups.
• Analysis of Sepsis-related Organ Failure Assessment (SOFA) scores and shock-to-ECMO intervals.
• Assessment of central venous oxygen saturation (ScvO2%) at various time points during ECMO.

Main Results:

• Eight patients were successfully weaned from ECMO, with five achieving discharge.
• Lower SOFA scores and shorter shock-to-ECMO intervals were observed in the survival group.
• Significant differences in ScvO2% were noted between survival and death groups at 12, 18, and 24 hours during ECMO.
• Normal ScvO2% at 12 hours during ECMO was a significant predictor of prognosis (OR 14.0, P=0.035).

Conclusions:

• Venoarterial ECMO can be a viable treatment option for select adult patients with refractory septic shock.
• Early indicators like SOFA score and shock-to-ECMO interval are crucial for assessing prognosis.
• Central venous oxygen saturation (ScvO2%) at 12 hours post-ECMO initiation may serve as a valuable prognostic marker in refractory septic shock.