Subglottic stenosis: correlation between computed tomography and bronchoscopy

Area of Science:

• Otolaryngology
• Radiology
• Comparative Medicine

Background:

• Subglottic stenosis evaluation lacks standardized methods.
• Accurate measurement of airway stenosis is crucial for effective treatment.

Purpose of the Study:

• To evaluate the correlation between computed tomography (CT) and bronchoscopy in assessing subglottic stenosis.
• To determine the reliability of CT in measuring the degree and length of airway stenosis.

Main Methods:

• Subglottic stenosis was surgically induced in 39 New Zealand White rabbits.
• Animals underwent spiral CT, rigid bronchoscopy, and open laryngotracheal exploration.
• Measurements of stenosis degree and length were compared between methods.

Main Results:

• CT measurements for the degree of stenosis were within 15% of bronchoscopic measurements in 94% of rabbits (Pearson correlation .94, p < .05).
• CT measurements for stenosis length were within 2 mm of open exploration in 94% of animals (Pearson correlation .81, p < .05).
• CT demonstrated strong correlation with bronchoscopy for evaluating tracheal stenosis in this rabbit model.

Conclusions:

• Computed tomography (CT) shows high correlation with bronchoscopy for evaluating subglottic stenosis.
• CT can serve as a valuable adjunct for assessing airway stenosis, especially for serial examinations.