Immunonutrition in surgical patients

Area of Science:

• Surgical Nutrition
• Immunonutrition
• Inflammation and Oxidative Stress

Background:

• Surgery triggers an inflammatory response, exacerbated by nutritional status and surgical stress.
• Key nutrients like amino acids, antioxidants, omega-3 fatty acids, and nucleotides modulate inflammation and immune function.
• Nutritional interventions aim to mitigate surgical stress and improve patient recovery.

Purpose of the Study:

• To review recent findings on the efficacy of immunonutrients in surgical patients.
• To identify specific nutrients and nutritional strategies beneficial for surgical outcomes.
• To guide clinical practice regarding immunonutrition in different patient populations.

Main Methods:

• Review of recent scientific literature on immunonutrients and surgical outcomes.
• Analysis of the effects of various nutrients on inflammation and immune function post-surgery.
• Synthesis of evidence to provide recommendations for different patient groups.

Main Results:

• Parenteral glutamine is recommended for parenteral nutrition patients; enteral glutamine for burn/trauma patients.
• Antioxidants (e.g., selenium) for critically ill patients; fish oil-enriched formulas for ARDS.
• Preoperative artificial nutrition is recommended for malnourished patients; oral immunonutrition for non-malnourished patients.
• Arginine-supplemented diets are not recommended.

Conclusions:

• Immunonutrition demonstrates efficacy in improving outcomes for various surgical patients, particularly the malnourished.
• Further large-scale, well-designed trials are necessary to confirm benefits to immune function and clinical outcomes in vulnerable populations.