Laryngeal Trauma

Etiology & Anatomy - Voicebox Vulnerabilities

Laryngeal trauma involves injury to the laryngeal cartilages, mucosa, or neurovascular structures.

• Common Mechanisms:
  • Blunt: Motor vehicle accidents (MVA), sports injuries, strangulation.
  • Penetrating: Stab wounds, gunshot injuries.
  • Iatrogenic: Difficult intubation, surgical procedures (e.g., thyroidectomy).
• Vulnerable Anatomy:
  • Cartilages: Thyroid (largest, shield-like), cricoid (complete ring, foundational), arytenoids (vocal cord movement).
  • Mucosa: Delicate lining susceptible to edema and lacerations.
  • Recurrent Laryngeal Nerve (RLN): Prone to injury, affecting vocal cord function and airway.

⭐ The thyroid cartilage is the most frequently fractured laryngeal cartilage in cases of blunt trauma to the neck an_exam_favourite_fact

Clinical Features - Alarming Airway Arias

Patients present with features indicating potential airway threat. Early recognition is key.

• Symptoms - The "3 Hs" are critical: 📌

  • Hoarseness (dysphonia): A common early sign.
  • Hemoptysis: Suggests mucosal tear.
  • H'airway compromise: Stridor, dyspnea - signals urgency!
  • Also: Neck pain, dysphagia, odynophagia.

• Signs on Examination - Look and Palpate:

  • Subcutaneous emphysema: Crepitus in neck tissues.
  • Laryngeal tenderness.
  • Deformity or palpable crepitus of the laryngeal framework.
  • Ecchymosis/hematoma: Visible bruising over the neck.

Initial Assessment: Airway First!

⭐ Subcutaneous emphysema in a trauma patient, particularly with voice change or breathing difficulty, strongly indicates laryngotracheal injury requiring immediate airway assessment.

Investigations & Staging - Larynx Lens Lowdown

• Diagnostic Modalities:
  • Flexible Nasopharyngolaryngoscopy (FNPL): Initial assessment.
  • CT Scan (Neck): Gold standard for fractures & extent.
  • Rigid Laryngoscopy: For detailed evaluation & intervention.
  • X-ray (Soft tissue neck): Limited value; may show air.

• Schaefer-Fuhrman Classification:

  Grade	Description	Findings
  I	Minor Endolaryngeal Hematoma	No detectable fracture, minor airway compromise.
  II	Edema, Hematoma, Mucosal Laceration	No exposed cartilage, non-displaced fracture.
  III	Massive Edema, Mucosal Laceration	Exposed cartilage, displaced fracture, vocal cord immobility.
  IV	Like Grade III + ≥2 Fractures	Unstable thyroid, anterior commissure disruption, severe airway compromise.
  V	Laryngotracheal Separation	Complete cricotracheal disruption.

⭐ CT scan is the investigation of choice for suspected laryngeal framework fractures.

Management & Complications - Voicebox Victory Plan

1. Airway Management (A-B-C First!)

• Observation, humidified O2, voice rest (mild cases).
• Endotracheal Intubation: Cautious, fiberoptic preferred. Avoid if severe distortion.
• Tracheostomy: Preferred for significant trauma, airway compromise (stridor, hematoma), failed intubation, or prolonged need.

2. Medical Therapy

• Steroids (e.g., IV Dexamethasone): Reduce edema.
• Antibiotics: For open injuries/mucosal tears.
• Anti-reflux (PPIs): Promote healing.

3. Surgical Repair (Voicebox Reconstruction)

• Indications: Exposed cartilage, displaced fractures (>2mm), vocal cord immobility, significant mucosal lacerations, airway compromise.
• Timing: Early repair (within 24-72 hrs) for best outcomes.
• Techniques: Open Reduction & Internal Fixation (ORIF), endolaryngeal repair, laryngeal stenting.

Management Algorithm:

4. Complications

• Early: Airway obstruction, hematoma, infection, subcutaneous emphysema.
• Late:
  • Laryngeal stenosis
  • Vocal cord paralysis
  • Dysphonia (persistent hoarseness)
  • Chronic aspiration
  • Granuloma

⭐ Laryngeal stenosis is the most common long-term complication of severe laryngeal trauma.

High‑Yield Points - ⚡ Biggest Takeaways

• Blunt trauma (RTA, clothesline injury) is the most common cause of laryngeal injury.
• Key symptoms: hoarseness, dyspnea, stridor, hemoptysis, subcutaneous emphysema.
• CT scan is gold standard imaging; laryngoscopy (flexible/rigid) assesses mucosal injury.
• Airway security (intubation/tracheostomy) is the paramount first step in management.
• Common injuries: cartilage fractures (thyroid most common), arytenoid dislocation (posterior), cricothyroid joint disruption.
• Major complications: vocal cord paralysis, late laryngeal stenosis.