Airway measurement using morphometric analysis.

M C Santos; L Strande; E J Doolin

doi:10.1177/000348949510401101

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Airway measurement using morphometric analysis.

M C Santos·L Strande·E J Doolin

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Abstract

Measurement of airway size using endoscopic morphometry was investigated. Endoscopic images of the porcine tracheobronchial tree were obtained via a Storz system at a known distance from the telescope. The bronchi were marked with transluminal wires, transected, and imaged. All images were analyzed morphometrically with a computer image at multiple sites (N = 20). The endoscopic measurements were plotted against the macro lens images so that a straight line with a slope of 1 would indicate a consistent correlation. Area measurements for all images had a slope of 0.67 (r = .885); however, for images with area < 80 mm2 the slope was 1 (r = .879), for images with area < 80 mm2 of 0.93 (r = .875), and for images with area > 80 mm2 of -0.34 (r = .482), and major axis had a slope for all images of 0.73 (r = .904), for images with area < 80 mm2 of 0.88 (r = .923), and for images with area > 80 mm2 of -0.59 (r = .771). Accurate area measurements as well as major and minor axis measurements can be obtained for airways with area < 80 mm2 by means of this system. Each bronchoscope-telescope unit has an optimal target size for which measurements are accurate.

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M C Santos, L Strande, E J Doolin. 1995. Airway measurement using morphometric analysis.. https://doi.org/10.1177/000348949510401101

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