Unit
- Classification by depth: Burns are categorized as superficial (first-degree), partial-thickness (second-degree), or full-thickness (third-degree). Superficial burns involve only the epidermis; partial-thickness extends into the dermis; full-thickness destroys all skin layers, often requiring surgical intervention. This classification guides treatment intensity and resource allocation.
- Classification by extent: Total body surface area (TBSA) percentage is calculated using the rule of nines, Lund-Browder chart, or palm method. Accurate TBSA determination is critical for fluid resuscitation estimates, triage decisions, and outcome prediction. Mistaken calculations can lead to under- or over-resuscitation.
- Classification by cause: Thermal burns (flame, scald, contact), chemical burns (acid, alkali, organic compounds), electrical burns (high-voltage, low-voltage, arc), and radiation burns (e.g., from medical therapy). Each etiology has unique pathophysiologic mechanisms and management considerations, such as the deep tissue damage in electrical injuries.
- Local burn pathophysiology: The burn wound demonstrates three zones: the zone of coagulation (irreversibly damaged), zone of stasis (potentially salvageable with adequate perfusion), and zone of hyperemia (increased blood flow). Management focuses on preventing progression of the zone of stasis through careful fluid therapy and wound care.
- Systemic inflammatory response: Large burns trigger a massive release of cytokines and inflammatory mediators, leading to systemic inflammatory response syndrome (SIRS). This hypermetabolic state increases caloric requirements, catabolic muscle wasting, and risk of multi-organ dysfunction. Early nutritional support is essential.
- Burn shock: Within the first 24-48 hours, increased capillary permeability causes fluid shifts from intravascular to interstitial spaces, resulting in hypovolemic shock. Fluid resuscitation protocols aim to restore circulating volume while avoiding complications like compartment syndrome.
Parkland formulaguides initial rates. - Immunosuppression after burn: Severe burns impair both innate and adaptive immunity, increasing susceptibility to infections. This includes disruption of skin barrier, reduced neutrophil function, and altered T-cell responses. Infection prevention measures, including isolation and hand hygiene, are paramount in burn unit operations.
- Metabolic and endocrine changes: The hypermetabolic response elevates catecholamines, cortisol, and glucagon, leading to hyperglycemia, protein catabolism, and lipolysis. Management includes tight glycemic control, early enteral feeding, and administration of anabolic agents like
oxandrolonewhen indicated. - Inhalation injury: Burns involving the airway require immediate assessment for upper airway edema, carbon monoxide poisoning, and chemical tracheobronchitis. Fiberoptic bronchoscopy may be used for diagnosis. Management includes high-flow oxygen, aggressive pulmonary toilet, and mechanical ventilation if needed. Inhalation injury significantly increases mortality and complicates fluid resuscitation.
- Wound care and dressing: Burn wound management involves cleaning, debridement of necrotic tissue, and application of antimicrobial dressings such as silver sulfadiazine or mafenide acetate. Early excision and grafting reduce infection risk and hospital stay. Dressing changes are often painful and require coordinated nursing care and adequate analgesia.
- Infection control precautions: Burn patients are at high risk for nosocomial infections, particularly from Pseudomonas aeruginosa and Staphylococcus aureus. Strict hand hygiene, isolation protocols, and surveillance cultures are standard. Antibiotic stewardship is critical to prevent resistance. The burn unit layout often includes separate air handling and dedicated staff.
- Pain management: Burn pain is severe and requires multimodal analgesia combining opioids, nonsteroidal anti-inflammatory drugs, and anxiolytics. Procedural pain during dressing changes necessitates premedication and possibly distraction techniques. Nonpharmacologic interventions like hypnosis or virtual reality are emerging adjuncts.
Scope of Practice
Role: Burn Unit Administrator
Within scope:
- Understanding burn classification to facilitate appropriate bed assignment and resource allocation
- Educating new staff on the pathophysiologic phases of burn injury for workflow planning
- Ensuring that medical records accurately document burn depth, TBSA, and etiology as per professional standards
Outside scope:
- Diagnosing burn depth or extent, which remains a physician responsibility
- Interpreting laboratory values to make fluid rate adjustments without order
- Providing clinical treatment recommendations based on pathophysiology
Quick Revision
- Burns are classified by depth, extent (TBSA), and cause, each affecting management.
- Pathophysiology includes local zone progression and systemic hypermetabolic response.
- Accurate classification supports effective triage, resuscitation, and infection control.
- Burn unit administrators use classification knowledge for operational decisions, not clinical diagnosis.
Disclaimer
Educational use only. Not intended for practical surgery, incisions, or other surgical procedures. It does not qualify you to perform physical operations.