Enteral nutrition in septic shock: A pathophysiologic conundrum

Area of Science:

• Critical Care Medicine
• Gastroenterology
• Sepsis Pathophysiology

Background:

• Septic shock, a severe sepsis subset, causes circulatory failure and gut dysfunction.
• Impaired gut epithelial barrier function (EBF) and inflammation contribute to multiple organ dysfunction.
• The optimal timing and dose of enteral nutrition (EN) in septic shock remain debated due to potential complications.

Purpose of the Study:

• To elucidate the pathophysiologic challenges of initiating EN in septic shock.
• To review current guideline-based recommendations for EN in septic shock.
• To evaluate the role of parenteral nutrition and appraise recent literature on EN strategies.

Main Methods:

• Review of pathophysiologic mechanisms linking septic shock and gut barrier function.
• Analysis of existing clinical practice guidelines for nutritional support in septic shock.
• Literature search and critical appraisal of studies published post-guidelines regarding EN timing, dose, and titration.

Main Results:

• Septic shock presents a dilemma: early EN preserves EBF, but GI complications may preclude its use.
• Guidelines offer recommendations, but evidence for optimal EN strategies is evolving.
• Parenteral nutrition serves a role, while post-guideline literature highlights ongoing research into EN titration and timing.

Conclusions:

• Initiating EN in septic shock requires balancing benefits of EBF preservation against risks of GI complications.
• Adherence to guidelines and critical appraisal of new literature are crucial for informed nutritional decisions.
• Further research is needed to refine EN timing, dosing, and titration protocols in septic shock management.