Nutrition in Trauma and Burns

Nutrition in trauma and burns is the part of critical-care nutrition concerned with the extreme metabolic demands that follow major injury, where the body enters a prolonged hypermetabolic, hypercatabolic state and, in burns, loses nutrients and fluid through the wound itself. Major burns in particular produce one of the most intense and sustained stress responses in medicine.

Definition

The study of how severe trauma and burns provoke a hypermetabolic, hypercatabolic state with greatly increased energy and protein needs and, in burns, wound-related nutrient losses, and of the nutritional support principles applied in these patients.

Scope

The topic covers the metabolic response to severe trauma and burns and the principles of nutritional support in these patients: the hypermetabolic state, raised protein and energy requirements, wound-related losses in burns, and the role of early enteral feeding. It frames endorsed recommendations and critical-care guidelines as reference knowledge to interpret, not as individualized prescriptions or dosing.

Core questions

• Why do major trauma and burns produce such a strong and prolonged hypermetabolic response?
• How do energy and protein requirements change after severe injury?
• Why are nutrient and fluid losses particularly important in major burns?
• What is the role of early enteral nutrition after trauma and burns?

Key concepts

• Hypermetabolic response to injury
• Hypercatabolism and protein loss
• Increased energy and protein requirements
• Wound-related nutrient and fluid losses (burns)
• Early enteral nutrition
• Ebb and flow phases of injury metabolism

Mechanisms

Severe trauma and burns trigger a powerful neuroendocrine and inflammatory response, classically described as an early 'ebb' phase of reduced perfusion followed by a prolonged 'flow' phase of hypermetabolism and hypercatabolism. Counter-regulatory hormones and cytokines drive sustained muscle protein breakdown, raised resting energy expenditure, and altered substrate use, so protein and energy requirements rise substantially. In major burns the injured skin adds further losses of fluid, protein, and micronutrients through the wound and increases susceptibility to infection, compounding the catabolic demand. Early enteral nutrition is generally emphasized to meet these needs and support gut function, as reflected in the ESPEN burn recommendations and intensive-care guidelines.

Clinical relevance

Nutritional support is a central part of caring for severely injured and burned patients because of their extreme catabolic demands. This entry explains the metabolic response and summarizes how endorsed burn recommendations (Rousseau et al., 2013) and critical-care guidelines (Singer et al., 2019; McClave et al., 2016) frame nutrition so the reader can interpret them; it describes population-level guidance and is not a basis for individualized feeding or dosing.

Epidemiology

Major burns and severe multiple trauma are leading causes of intensive-care admission for injury, and their sustained hypermetabolism contributes to muscle loss, impaired healing, and longer recovery, which is why aggressive attention to nutrition is standard in burn and trauma care. The hypermetabolic response after large burns can persist for weeks to months.

Evidence & guidelines

The ESPEN endorsed recommendations on nutritional therapy in major burns (Rousseau et al., 2013) provide burn-specific framing, while the ESPEN intensive-care guideline (Singer et al., 2019) and the SCCM/ASPEN guideline (McClave et al., 2016) cover the broader trauma and critical-illness context. These sources emphasize meeting elevated protein and energy needs, supporting wound healing, and using early enteral nutrition where feasible, framed as population-level recommendations.

History

The metabolic response to injury was characterized in the twentieth century through the description of 'ebb' and 'flow' phases, which framed how clinicians think about feeding after major trauma and burns. Burn care in particular developed an emphasis on aggressive nutritional support to counter extreme hypermetabolism, an approach later consolidated in endorsed recommendations and critical-care guidelines.

Seminal works

• rousseau-2013
• singer-2019
• mcclave-2016

Frequently asked questions

Why do burns and major trauma increase nutritional needs so much?

Severe injury triggers a prolonged hypermetabolic, hypercatabolic state that accelerates muscle breakdown and raises energy expenditure; in major burns the wound adds further losses of fluid, protein, and micronutrients, so protein and energy requirements rise substantially.

Is early feeding emphasized after severe injury?

Endorsed burn recommendations and critical-care guidelines generally emphasize early enteral nutrition where feasible to help meet the high energy and protein demands and support gut function, though specifics are framed at the population level rather than as individual prescriptions.