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- Title
A Simple Endoscopic Technique for Measuring the Cross-Sectional Area of the Upper Airway in a Rabbit Model.
- Authors
Wistermayer, Paul R.; McIlwain, Wesley R.; Ieronimakis, Nicholas; Rogers, Derek J.
- Abstract
Objective: Validate an accurate and reproducible method of measuring the cross-sectional area (CSA) of the upper airway. Subjects and Methods: This is a prospective animal study done at a tertiary care medical treatment facility. Control images were obtained using endotracheal tubes of varying sizes. In vivo images were obtained from various timepoints of a concurrent study on subglottic stenosis. Using a 0° rod telescope, an instrument was placed at the level of interest, and a photo was obtained. Three independent and blinded raters then measured the CSA of the narrowest portion of the airway using open source image analysis software. Results: Each blinded rater measured the CSA of 79 photos. The t testing to assess for accuracy showed no difference between measured and known CSAs of the control images (P = .86), with an average error of 1.5% (SD = 5.5%). All intraclass correlation (ICC) values for intrarater agreement showed excellent agreement (ICC > .75). Interrater reliability among all raters in control (ICC = .975; 95% CI, .817-.995) and in vivo (ICC = .846;, 95% CI, .780-.896) images showed excellent agreement. Conclusions: We validate a simple, accurate, and reproducible method of measuring the CSA of the airway that can be used in a clinical or research setting.
- Subjects
RESPIRATORY organ anatomy; ANIMAL experimentation; ENDOSCOPY; LONGITUDINAL method; RABBITS; WEIGHTS &; measures
- Publication
Annals of Otology, Rhinology & Laryngology, 2018, Vol 127, Issue 4, p275
- ISSN
0003-4894
- Publication type
Article
- DOI
10.1177/0003489418759361