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Updated: Apr 16, 2026

Point-of-Care Ultrasound: A Review of Ultrasound Parameters for Predicting Difficult Airways
Published on: April 7, 2023
Radiographic adenoid evaluation: proposal of an objective parameter.
Murilo Fernando Neuppmann Feres1, Juliana Sato Hermann2, Ana Carolina Sallum3
1Professor, Division of Preventive and Interceptive Orthodontics, Universidade São Francisco, Bragança Paulista, SP, Brazil.
Current radiographic methods for assessing adenoid hypertrophy show limited accuracy. A new regression model offers a more reliable way to predict nasopharyngeal obstruction when advanced imaging is unavailable.
Area of Science:
- Otolaryngology
- Pediatric Radiology
- Diagnostic Imaging
Background:
- Adenoid hypertrophy is a common cause of pediatric nasal obstruction and oral breathing.
- Current radiographic parameters for evaluating adenoid hypertrophy have limitations in accuracy.
Purpose of the Study:
- To evaluate existing radiographic parameters for adenoid hypertrophy and nasopharyngeal obstruction.
- To develop and present an alternative radiographic assessment method for choanal obstruction.
Main Methods:
- Children aged 4-14 with nasal obstruction or oral breathing underwent cavum radiography.
- 120 radiographic records were assessed using quantitative parameters and correlated with videonasopharyngoscopy.
- A regression analysis was performed to create a predictive model for choanal obstruction percentage.
Main Results:
- Existing quantitative radiographic parameters showed weak to moderate correlation with actual choanal obstruction.
- The developed regression model (110.119*A/N) demonstrated satisfactory predictive ability for choanal obstruction.
Conclusions:
- Current quantitative radiographic parameters for adenoid hypertrophy have significant limitations.
- The proposed regression model serves as a viable alternative for assessing nasopharyngeal obstruction, especially when videonasopharyngoscopy is not accessible.
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