Nutritional support and infection: does the route matter?

Area of Science:

• Clinical Nutrition
• Gastroenterology
• Critical Care Medicine

Background:

• Total parenteral nutrition (TPN) is a life-saving therapy for patients unable to tolerate enteral nutrition.
• Despite its benefits, TPN is associated with infectious complications.
• The route of nutritional support significantly impacts patient outcomes.

Purpose of the Study:

• To compare the incidence of infectious complications between enteral nutrition and parenteral nutrition.
• To explore the potential mechanisms by which enteral nutrition may reduce infections.
• To highlight the clinical significance of nutritional route in critically ill patients.

Main Methods:

• Review of clinical studies comparing enteral nutrition and parenteral nutrition.
• Analysis of data on infectious complication rates in different nutritional support groups.
• Exploration of physiological mechanisms related to gut barrier and immune function.

Main Results:

• Enteral nutrition is associated with decreased rates of infectious complications compared to parenteral nutrition.
• These benefits appear early after injury or illness, suggesting mechanisms beyond malnutrition prevention.
• Enteral nutrition may support the gut barrier and gut-associated lymphoid tissue, influencing distant infections.

Conclusions:

• The enteral route of nutrition is clinically superior to the parenteral route in reducing infectious complications.
• While mechanisms are not fully elucidated, supporting gut integrity and immunity is implicated.
• Enteral nutrition should be prioritized for critically ill or injured patients when feasible.