A Randomized Controlled Trial of Dexamethasone as a Prophylactic Treatment for Subglottic Stenosis in a Rabbit Model

Area of Science:

• Otolaryngology
• Surgical Research
• Pharmacology

Background:

• Iatrogenic injury is a frequent cause of subglottic stenosis (SGS).
• Preventive strategies for iatrogenic SGS are crucial for patient outcomes.
• Glucocorticoids are known for their anti-inflammatory properties.

Purpose of the Study:

• To investigate the efficacy of pre-injury dexamethasone in preventing iatrogenic subglottic stenosis.
• To evaluate the impact of a single dose of dexamethasone on airway stenosis following endoscopic injury.

Main Methods:

• A rabbit model (New Zealand White) was used to create subglottic stenosis via endoscopic injury.
• Subjects received either intramuscular dexamethasone (2 mg/kg) or saline 15 minutes prior to injury.
• Airway cross-sectional area was measured endoscopically before and one week after injury.

Main Results:

• Dexamethasone-treated rabbits showed significantly less airway stenosis (20.3%) compared to saline-treated controls (60.6%) one week post-injury (P=.01).
• No significant difference in airway size was observed between groups prior to injury (P=.28).
• Control subjects required more postoperative steroid doses, indicating greater distress.

Conclusions:

• A single pre-injury dose of systemic dexamethasone significantly reduced airway stenosis in an iatrogenic SGS model.
• This study provides the first evidence for using pre-injury glucocorticoids to prevent iatrogenic subglottic stenosis.
• Administering dexamethasone before procedures with potential for subglottic injury, such as traumatic intubation, is recommended.