3D-printed pediatric laryngotracheal models were created based on computed tomography scans, then artificially deformed to simulate both circumferential and posterior subglottic stenosis. Two observers made six measurements of the minimum cross-sectional area (MCSA) and length of stenosis of each model with EndoFLIP. Agreement between observer measurements and model dimensions was evaluated using Lin\'s concordance correlation coefficient; inter-observer reliability was assessed using intraclass correlation.
Four models were created: two without pathology (MCSA: 132.4, 44.3 mm2 ) and two with subglottic stenosis (MCSA: 28.7, 59.7 mm2 , stenotic length 27.8, 24.4 mm). Observer measurements of MCSA and length of stenosis demonstrated high concordance with the models (r = 0.99, 0.95, p < 0.001) with a mean error of 4.5% and 18.2% respectively. There was a low coefficient of variation (0.6%-2.8%) for measurements, indicating high precision. Interrater reliability was high for both MCSA and stenotic length (ICC: 0.99, 0.98).
The EndoFLIP system allows for accurate and reproducible measurements of cross-sectional area and stenotic length in pediatric airway models. This method may provide further advantages in the evaluation of airway distensibility, as well as measurements of asymmetric airway pathology.
NA Laryngoscope, 134:108-112, 2024.
方法:基于计算机断层扫描创建3D打印的小儿喉气管模型,然后人工变形以模拟环状和后部声门下狭窄。两名观察者使用EndoFLIP对每个模型的最小横截面积(MCSA)和狭窄长度进行了六次测量。使用Lin的一致性相关系数评估观察者测量值与模型尺寸之间的一致性;使用组内相关性评估观察者间的可靠性。
结果:创建了四个模型:两个无病理(MCSA:132.4,44.3mm2)和两个声门下狭窄(MCSA:28.7,59.7mm2,狭窄长度27.8,24.4毫米)。MCSA和狭窄长度的观察者测量显示与模型高度一致(r=0.99,0.95,p<0.001),平均误差分别为4.5%和18.2%。测量的变异系数低(0.6%-2.8%),指示精度高。MCSA和狭窄长度(ICC:0.99,0.98)的评分者间可靠性很高。
结论:EndoFLIP系统可以准确且可重复地测量小儿气道模型的横截面积和狭窄长度。该方法可以在评估气道扩张性方面提供进一步的优势。以及不对称气道病理的测量。
方法:N/A喉镜,2023年。