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Volumetric Morphology of Segmental Trachea Sections

The trachea is the airway between the larynx and primary bronchi, extending from the inferior aspect of the cricoid cartilage to its bifurcation at the carina. Its anterior and lateral walls are comprised of 16‐22 C‐shaped cartilaginous rings held together by annular ligaments, while its posterior wall consists primarily of trachealis muscle. Studies of trachea length, coronal and sagittal diameters, and dynamics are well represented in the literature with significant differences reported between genders. However, studies regarding volumetric morphology of the trachea are limited. Several structures (e.g., thyroid gland, brachiocephalic trunk, left brachiocephalic vein, etc.) are in contact with different regions of the trachea and could potentially affect lumen volumes. The objective of this study was to investigate tracheal volumetric morphology through segmental area analysis of cadaveric male and female tracheas and compare those results to a known case of distal trachea constriction.