3.3 American Burn Association (ABA) Burn Center Referral Criteria and Transport Logistics

American Burn Association (ABA) Burn Center Referral Criteria and Transport Logistics

Quick Summary: Specialized burn centers provide multidisciplinary care that dramatically reduces mortality, lengths of hospital stay, and long-term contracture disabilities. The American Burn Association (ABA) has established 10 definitive burn center referral criteria. When a patient meets any of these criteria, prompt inter-facility transfer must be arranged. Safe transport demands rigorous pre-transport stabilization, meticulous thermoregulation, and strict adherence to dry dressing protocols.

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1. The 10 Official ABA Burn Center Referral Criteria

Patients meeting any of the following 10 clinical criteria should be referred to an ABA-verified burn center following initial stabilization:

                        THE 10 OFFICIAL ABA BURN CENTER REFERRAL CRITERIA
  ┌───┬─────────────────────────────────────────────────────────────────────────────────────────┐
  │ 1 │ Partial-thickness burns greater than 10% Total Body Surface Area (TBSA).                │
  ├───┼─────────────────────────────────────────────────────────────────────────────────────────┤
  │ 2 │ Burns that involve the face, hands, feet, genitalia, perineum, or major joints.         │
  ├───┼─────────────────────────────────────────────────────────────────────────────────────────┤
  │ 3 │ Third-degree (full-thickness) burns in any age group.                                  │
  ├───┼─────────────────────────────────────────────────────────────────────────────────────────┤
  │ 4 │ Electrical burns, including lightning injury.                                           │
  ├───┼─────────────────────────────────────────────────────────────────────────────────────────┤
  │ 5 │ Chemical burns.                                                                         │
  ├───┼─────────────────────────────────────────────────────────────────────────────────────────┤
  │ 6 │ Inhalation injury (smoke, toxic fumes, thermal steam).                                  │
  ├───┼─────────────────────────────────────────────────────────────────────────────────────────┤
  │ 7 │ Burn injury in patients with pre-existing medical disorders that could complicate       │
  │   │ management, prolong recovery, or affect mortality (e.g., ESRD, severe CAD, diabetes).  │
  ├───┼─────────────────────────────────────────────────────────────────────────────────────────┤
  │ 8 │ Any patient with burns and concomitant trauma (such as fractures) in which the burn     │
  │   │ poses the greatest risk of morbidity or mortality.*                                    │
  ├───┼─────────────────────────────────────────────────────────────────────────────────────────┤
  │ 9 │ Burned children in hospitals without qualified pediatric personnel or equipment.       │
  ├───┼─────────────────────────────────────────────────────────────────────────────────────────┤
  │ 10│ Burn injury in patients who will require special social, emotional, or rehabilitative   │
  │   │ intervention (including suspected non-accidental trauma, child/elder abuse, psychiatric)│
  └───┴─────────────────────────────────────────────────────────────────────────────────────────┘

Special Trauma Triage Caveat: If traumatic injuries (e.g., massive intra-abdominal hemorrhage, expanding epidural hematoma, unstable pelvic fracture) pose the immediate greater threat to life, the patient must be stabilized initially in a verified Level 1 Trauma Center before transferring to the burn center.

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2. In-Depth Rationale for Key Referral Criteria

Criterion 2: Special Functional and Cosmetic Anatomical Areas

Burns involving the face, hands, feet, genitalia, perineum, or major joints mandate referral regardless of how small the percentage of TBSA may be (even a 1% full-thickness burn to a hand):

• Hands and Feet: Contain delicate, superficial neurovascular bundles, thin dorsal skin, and complex extensor tendon mechanisms. Inadequate surgical debridement, improper splinting, or delayed autografting results in debilitating contractures, claw-hand deformities, and permanent loss of occupational function.
• Face: Involves complex cosmetic subunits, high risk for eyelid retraction (ectropion), microstomia, nasal chondritis, and severe psychosocial trauma.
• Genitalia and Perineum: Present high risks of fecal contamination, necrotizing soft-tissue infection, and urethral strictures requiring specialized wound management.
• Major Joints (Shoulders, Elbows, Wrists, Hips, Knees, Ankles): Crossing joint lines predisposes to severe hypertrophic scarring and unyielding flexion contractures that permanently restrict range of motion.

Criterion 4: Electrical and Lightning Injuries

Electrical injuries act as "iceberg injuries." The surface skin entry and exit contact wounds often appear deceptively small, but electrical current traversing deep tissues generates extreme internal resistive heat ($Joulean\text{ heating} = I^2 \times R \times t$). This causes:

1. Extensive deep muscle necrosis and periosteal destruction.
2. Acute rhabdomyolysis and myoglobinuric acute kidney injury.
3. Severe extremity compartment syndrome requiring urgent multi-compartment fasciotomies.
4. Delayed cardiac dysrhythmias and progressive neurological deficits.

Criterion 5: Chemical Burns

Chemical agents (acids causing coagulation necrosis; alkalis causing deep liquefactive necrosis) continue to penetrate and destroy tissues until fully deactivated and diluted. Specialized therapies (e.g., intra-arterial or topical calcium gluconate for hydrofluoric acid burns) require specialized burn center protocols.

Criterion 6: Inhalation Injury

Inhalation trauma dramatically increases burn mortality (adding up to 20% to 40% absolute mortality). It requires advanced diagnostic bronchoscopy, inhaled pulmonary pharmacotherapy (e.g., nebulized heparin, N-acetylcysteine, bronchodilators), lung-protective ventilation, and specialized airway clearance regimens.

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3. Pre-Transport Critical Care Stabilization Protocols

Before initiating ground or aeromedical inter-facility transport, the referring facility must perform comprehensive patient stabilization. Transporting an unstable burn patient without securing life-sustaining infrastructure leads to in-transit arrest.

                         CRITICAL CARE PRE-TRANSPORT STABILIZATION CHECKLIST
  ┌─────────────────────────────────────────────────────────────────────────────────────────────┐
  │ [ ] AIRWAY: Proactive endotracheal intubation if airway compromise suspected; verify depth   │
  │ [ ] BREATHING: 100% humidified O2; mechanical ventilation with lung-protective settings     │
  │ [ ] CIRCULATION: 2 secure large-bore IV lines; infuse Lactated Ringer's at calculated rate │
  │ [ ] URINARY CATHETER: Place Foley with urometer; titrate fluids to target hourly output    │
  │ [ ] GASTRIC DECOMPRESSION: Place NG/OG tube to low suction for all burns ≥20% TBSA           │
  │ [ ] WOUND CARE: Wrap ONLY in clean, DRY sheets/blankets; NO wet dressings, NO creams        │
  │ [ ] THERMOREGULATION: Pre-warm ambulance/cabin; infuse warm fluids; monitor core temp       │
  │ [ ] ANALGESIA: Titrate IV fentanyl or morphine; NO intramuscular injections                 │
  │ [ ] DOCUMENTATION: Send copies of vitals, I/O flowsheets, labs, imaging, and TBSA charts   │
  └─────────────────────────────────────────────────────────────────────────────────────────────┘

Airway and Respiratory Stabilization

• If the patient exhibits signs of inhalation injury, facial/perioral burns, stridor, or requires significant fluid resuscitation for large burns (>30–40% TBSA), intubate prior to transport. Progressive airway edema during a 2-hour ambulance or helicopter flight can result in catastrophic airway loss in a confined transport space.
• Verify endotracheal tube placement using continuous waveform capnography ($EtCO_2$) and chest radiography. Secure the tube with twill ties rather than adhesive tape.

Vascular Access and Resuscitation Management

• Establish two dedicated large-bore peripheral IV lines (16-gauge or 18-gauge) or intraosseous (IO) lines.
• Calculate the initial fluid rate using Lactated Ringer's (LR) according to ABA consensus guidelines (e.g., starting rate for adults = $2\text{ mL} \times \text{weight (kg)} \times %\text{TBSA}$, with half administered over the first 8 hours from time of injury).
• Time of Injury Anchor: Fluid calculations must be based on the time the burn injury occurred, not the time the patient arrived at the emergency department. If transfer is delayed, fluid infusion rates must be adjusted to account for elapsed time.
• Avoid In-Transit Boluses: Do not administer rapid fluid boluses unless profound uncorrected hemorrhagic shock is present. Over-resuscitation during transport accelerates edema formation and precipitates acute airway loss.

Urinary Catheterization & Precise Output Monitoring

• Insert an indwelling urinary catheter attached to a precision hourly urometer for all patients with burns ≥20% TBSA, high-voltage electrical injuries, or those undergoing transfer.
• Establish baseline output and document hourly volumes during transit. Resuscitation fluids are titrated directly to achieve standard target hourly urine outputs:
  • Adults: $0.5\text{ mL/kg/hr}$ ($30\text{ to }50\text{ mL/hr}$).
  • Pediatric patients (<30 kg): $0.5\text{ to }1.0\text{ mL/kg/hr}$.
  • High-Voltage Electrical / Myoglobinuria: $1.0\text{ to }1.5\text{ mL/kg/hr}$ (or $75\text{ to }100\text{ mL/hr}$ in adults) until urine clears.

Gastric Decompression (NG/OG Tube Placement)

• Patients with burns involving >20% TBSA develop sympathetic-mediated splanchnic vasoconstriction resulting in acute gastric atony and paralytic ileus.
• Insert a nasogastric (NG) or orogastric (OG) tube and connect to low intermittent suction prior to departure. Decompression prevents massive gastric dilatation, emesis, and lethal aspiration during transit.

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4. Wound Care and Thermoregulation Standards for Transit

Two critical dressing principles must be strictly enforced before the transport team departs:

1. The Strict "Dry Dressing" Rule

• Wrap in Clean, Dry Sheets: Cover all burn wounds with clean, dry, sterile or non-sterile linens, followed by warm blankets.
• NEVER Apply Wet Dressings: Wet, saline-soaked sheets or wet towels must never be used for transport. Evaporative heat loss from wet sheets across large body surface areas rapidly plunges the patient into severe, irreversible hypothermia within minutes during transit.

2. The "No Topical Creams" Rule Prior to Transfer

• Do NOT Apply Topical Antimicrobials: Do not apply silver sulfadiazine (Silvadene), mafenide acetate (Sulfamylon), bacitracin, or colored creams to burn wounds prior to transfer.
• Clinical Rationale: Topical creams obscure the wound bed, preventing the receiving burn surgeon from evaluating burn depth, capillary refill, and viability upon arrival. Furthermore, the receiving burn unit must painfully scrape and debride the cream to perform their initial assessment, causing unnecessary trauma to the patient.

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5. Transport Logistics, Communication, and Nursing Handoff

• Mode of Transport Selection: Ground ambulance vs. rotor-wing (helicopter) vs. fixed-wing critical care aircraft depends on travel distance, weather conditions, terrain, and the patient's physiological stability. Helicopter or fixed-wing transport is indicated for long distances (>50–100 miles) or when rapid transit is required for airway/surgical emergencies.
• Inter-Facility Communication: Direct physician-to-physician and nurse-to-nurse telephone handoff must occur prior to departure. The referring nurse provides a structured SBAR (Situation, Background, Assessment, Recommendation) report.
• Transfer Packet Documentation: The transport team must be provided with complete copies of:
  1. The primary and secondary survey records with detailed burn flowcharts.
  2. Exact time of injury and baseline vital signs flowsheets.
  3. Total volume and types of all intravenous fluids infused since injury.
  4. Hourly urine output records from catheter placement.
  5. All administered analgesics, sedatives, paralytics, and tetanus immunization records.
  6. Diagnostic laboratory results (ABG with co-oximetry, electrolytes, lactate, CBC) and imaging.