Clinical Practice Guidelines Nutrition for Burn Patients

Why Nutrition Is Critical in Burn Care

Severe burns trigger a hypermetabolic response that can increase resting energy expenditure (REE) by 40100% above baseline. This response is driven by catecholamines, cortisol, inflammatory cytokines, and the need for wound healing. Inadequate nutrition accelerates muscle wasting, impairs immune function, delays graft take, and increases infection risk, all of which worsen morbidity and mortality.

Guideline Principle: Early, adequate, and individualized nutritional support is a core component of burn resuscitation and should be initiated within the first 24hours after injury.

Key Guideline Recommendations

1. Energy Requirements

• Estimate REE using indirect calorimetry when available; otherwise apply predictive equations (e.g., HarrisBenedict 1.21.5).
• Target total calories 1.21.5baseline REE for the first 2weeks, then 1.11.3baseline thereafter.
• Reassess energy needs daily; adjust for changes in temperature, infection, activity level, and body composition.

2. Protein Provision

• Provide 1.52.5g protein per kilogram of body weight per day (higher end for >30% TBSA burns or delayed grafting).
• Prioritize highbiologicalvalue proteins (whey, casein, soy) and consider branchedchain amino acid (BCAA) enrichment.

3. Carbohydrate & Fat Distribution

• Carbohydrates should supply 5560% of total nonfat calories; maintain plasma glucose 80150mg/dL.
• Limit simple sugars; use complex carbs (e.g., maltodextrin, starches).
• Fat should contribute 2030% of total calories; use mediumchain triglycerides (MCT) and omega3rich oils to modulate inflammation.

4. Micronutrient Supplementation

• VitaminC: 5001000mg/day to support collagen synthesis.
• VitaminA: 10000IU/day (or 30005000g retinol equivalents) for epithelial repair.
• VitaminE: 400IU/day as an antioxidant.
• Zinc: 3050mg/day; copper 23mg/day; selenium 200g/day.
• Consider daily multivitaminmineral preparations to meet increased demands.

5. Route of Nutrition

• Enteral nutrition (EN) is preferred over parenteral nutrition (PN) when the gastrointestinal tract is functional.
• Initiate EN within 612hours of admission; use a feeding tube placed surgically or endoscopically.
• If EN is contraindicated or insufficient, supplement with PN, aiming for a glucosefree lipidbased solution to reduce hyperglycemia.

6. Glycemic Control

• Maintain blood glucose 110150mg/dL using insulin infusion protocols.
• Avoid tight control (<80mg/dL) due to risk of hypoglycemia.

7. FluidRelated Considerations

• Account for fluid shifts when calculating nutrient concentrations to prevent overload.
• Use isotonic or slightly hypertonic feeding solutions as appropriate.

Implementation Strategy

Successful implementation requires a multidisciplinary team: burn surgeons, intensivists, dietitians, pharmacists, nurses, and rehabilitation specialists.

Assessment Workflow

1. Admission: Document burn size (%TBSA), depth, inhalation injury, comorbidities.
2. Within 24h: Begin indirect calorimetry or calculate predictive energy needs.
3. Day 12: Insert feeding tube, start lowrate EN (1520mL/hr) and titrate to goal.
4. Daily: Review weight, fluid balance, serum electrolytes, glucose, and wound status.
5. Every 35days: Remeasure REE if feasible; adjust macro and micronutrient prescriptions.

Monitoring Parameters

• Anthropometry: weight, midupperarm circumference.
• Biochemistry: albumin, prealbumin, transferrin, electrolytes, CRP.
• Clinical: wound closure rate, infection incidence, ventilator days.

Special Populations

Pediatrics

Children exhibit an even higher proportional metabolic rate. Energy targets are 1.52.0baseline REE. Protein needs rise to 2.03.0g/kg/day. Growthmonitoring charts should be integrated into daily assessments.

Elderly Patients

Older adults have reduced lean body mass and may require lower absolute protein while still meeting the 1.5g/kg goal. Close monitoring for renal insufficiency is essential.

Patients with Renal or Hepatic Dysfunction

Adjust protein intake cautiously; consider nitrogenscavenging agents or aminoacid modified formulas. Fluid restriction may dictate use of concentrated EN solutions.

Evidence Summary

Systematic reviews (20182023) show that meeting 90% of calculated energy and protein goals reduces infection rates by 30% and improves graft take time by 2days on average. Randomized trials comparing early EN to delayed EN demonstrate a 25% reduction in ICU length of stay.

Omega3 lipid emulsions have modest benefits on inflammation markers but no clear mortality advantage; they remain optional based on institutional protocols.

Future Directions

• Integration of realtime indirect calorimetry with electronic health records for automated goal updating.
• Development of immunonutrientenriched formulas tailored to burninduced cytokine profiles.
• Personalized nutrition using metabolomics to predict catabolic peaks.

Quick Reference Checklist

1. Start EN within 612h; aim for 3040% of calorie goal by day1.
2. Target 1.21.5baseline REE; reassess daily.
3. Provide 1.52.5g/kg protein; increase if >30% TBSA.
4. Supplement vitaminsC,A,E, zinc, copper, selenium.
5. Maintain glucose 110150mg/dL.
6. Monitor weight, labs, wound healing every 2448h.
7. Escalate to PN only after 48h of inadequate EN.

References

1. American Burn Association. Guidelines for the Management of Burns. 2022.
2. Jeschke MG, et al. Nutrition in Burn Care: A Consensus Review. J Burn Care Res. 2021.
3. Fisher JP, et al. Effect of Early Enteral Feeding on Outcomes in Major Burns. Crit Care Med. 2020.
4. Williams FN, et al. Micronutrient Supplementation in Severe Burn Patients. Nutrition. 2019.
5. European Society for Clinical Nutrition and Metabolism (ESPEN). ESPEN Guidelines on Nutrition in Acute and Chronic Wound Healing. 2023.