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Comparison of Airway Measurements for Tracheobronchial Stenosis Between Stereoscopic Bronchoscope and MD-CT.

Comparison of Airway Measurements for Tracheobronchial Stenosis Between Stereoscopic Bronchoscope and MD-CT.
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Nobuyama S, Sato T, Handa H, Nishine H, Inoue T, Mineshita M, Miyazawa T,


Nobuyama S, Sato T, Handa H, Nishine H, Inoue T, Mineshita M, Miyazawa T, (click to view)

Nobuyama S, Sato T, Handa H, Nishine H, Inoue T, Mineshita M, Miyazawa T,

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Journal of bronchology & interventional pulmonology 24(4) 296-302 doi 10.1097/LBR.0000000000000409
Abstract
BACKGROUND
Stereoscopic bronchoscopy is a new diagnostic tool to measure the diameter and cross-sectional area of the airway. The stereoscopic bronchoscope, which operates the same as a standard bronchoscope, utilizes 2 lenses to measure the airway using the principles of triangulation. Furthermore, the stereoscopic bronchoscope has the capability to measure the size of the airway during intervention in real-time, including variable stenosis.

MATERIALS AND METHODS
To prospectively compare preoperative stereoscopic and multidetector computed tomography (MD-CT) images to select the appropriate stent size for airway stenosis. Stereoscopic and MD-CT images were then measured to confirm the correct placement of the stent.

RESULTS
Airway stenting was performed on 21 consecutive patients of whom, 15 were diagnosed with malignant and 6 with benign diseases. In total, 165 measurements were taken (134 healthy; 31 affected). For the diameter, Bland-Altman plots were used to measure data from 165 matched stereoscopic and MD-CT measurement sites (bias, 0.40±2.86 mm SD; percentage error, 33%), 134 healthy sites (bias, 0.554±2.83 mm SD; percentage error, 34%), and 31 affected sites (bias, 1.20±2.67 mm SD; percentage error, 52%). For the cross-sectional area, matched stereoscopic and MD-CT measurements were analyzed for 65 sites (bias, -10.53±92.85 mm SD; percentage error, 89%), 49 healthy sites (bias, -9.88±39.00 mm SD; percentage error, 32%), and 16 affected sites (bias, -13.12±48.81 mm SD; percentage error, 92%).

CONCLUSION
Stereoscopic bronchoscopy was able to accurately measure the size of the airway during intervention, to assist in selecting the appropriate size of the stent.

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