Clinical Management of Inhalation Injury in Burn Patients

Recognizing Inhalation Injury

• 💡 Soot in the airway, singed nasal hairs, and coughing are clues, but not definitive indicators for intubation.
• ⚠️ True inhalation injury is indicated by progressive hoarseness, difficulty clearing secretions, mental status changes, or increasing work of breathing.
• 🎯 Differentiate between superglotic injury (thermal, causing swelling and stridor) and infraglotic injury (smoke/gas, causing chemical damage).
• 🩺 A physical exam should include checking for mucosal disruption or blistering, which are high-risk signs.

Intubation and Airway Management

• 🚀 Early intubation may be necessary to anticipate airway edema from large volume resuscitation, especially in larger burns.
• 🧑‍⚕️ The most experienced provider should perform intubation for high-risk airways, with equipment and personnel for a surgical airway readily available.
• 📊 Chest X-rays are typically normal initially after inhalation injury, but flexible bronchoscopy within 24 hours is the gold standard for diagnosis and grading.
• 🚫 Avoid prophylactic intubation; focus on respiratory status, phonation, and signs of obstruction.

Systemic Toxicity and Initial Management

• 💨 Carbon monoxide and cyanide exposure are common, with high-flow 100% oxygen as first-line therapy.
• ⚠️ Hydroxycobalamin (Cyanokit) is an antidote for cyanide toxicity, but should be used cautiously due to potential for acute kidney injury.
• 📈 Mortality is significantly higher for patients with both burns and inhalation injury.

Flash Burns vs. Inhalation Injury

• 🔥 Flash burns from smoking on oxygen typically cause thermal injury to the face, not true smoke inhalation injury.
• 🏥 Many flash burn patients, especially those without airway compromise, can be managed as outpatients.
• ⚠️ Be vigilant for airway edema if the flash occurred with an open mouth or if voice changes are present, though this is rare.

Therapeutic Strategies

• 🫁 Ventilatory support should mimic ARDS management: low tidal volume, high PEEP, proning, and short-term paralysis.
• 💊 The HAM regimen (Heparin, Albuterol, Mucomyst) is a standard therapy to reduce airway cast formation and improve clearance.
• 🚫 Steroids generally have no role in true inhalation injury unless treating concomitant reactive airway disease, as they can increase infection risk and impair wound healing.

Long-Term Complications and Prognosis

• 📉 Inhalation injury dramatically worsens outcomes, requiring massive fluid resuscitation (2-3x usual volume) while balancing the risk of pulmonary edema.
• 🗣️ Long-term sequelae can include chronic cough, dysphonia, tracheo-subglottic stenosis, and reduced functional capacity, necessitating multidisciplinary follow-up.
• 🧠 Psychological impacts such as PTSD, anxiety, and depression are common.
• 🔪 Tracheostomy may be considered early in patients with significant facial/neck burns or anticipated prolonged intubation to facilitate pulmonary hygiene and securement.