The Morphometric Study of Main Bronchus in Korean Cadaver

Abstract

: This morphometric study of main bronchus was performed to provide the basic data necessary for anatomists, anesthetists and emergency medical technicians. A total of 48 cadavers, 33 men and 15 women, were used in this study. When it comes to their average age, men were 70 years old (50 to 91 years old), and women were 74 years old (47 to 92 years old). For this study, the length of the left and right main bronchi and the angle between them, and the first bronchial cartilage's each anteroposterior diameter, transverse diameter, vertical height, and distance between posterior ends of cartilage were measured.As for the length, left length was longer than right length regardless of gender, and there was no significant difference between men and women. When it comes to anterorposterior diameter, transverse diameter, and distance between posterior ends of the first bronchial cartilage in main bronchi, the right side was longer and wider than left side regardless of gender, but statistical significance was shown only in the distance between posterior ends of cartilage. Vertical height of the first bronchial cartilage in main bronchi did not show any difference between the left and right and between men and women, and men cadavers had a very large individual difference from 2.35 mm to 9.22 mm. As for the angle of the main bronchi's separation from trachea's major axis, the left side was larger than the right side in both men and women cadavers and it was larger in men than women, but there was no significant statistical difference. Lastly, as for the length of the main bronchi, the right and left lengths in men were 16.83±1.36 and 37.26±1.42 mm respectively; and the right and left lengths in women were 16.90±2.26 and 36.08±3.39 mm respectively. These results are expected to be used as the basic clinical data useful for medical procedures of emergency care practitioners, anesthetists and emergency medical technicians.

Systematic literature study of trachea and bronchus morphology in children and adults

“…In studies conducted on adults, the lengths of the main bronchus were found to be greater in males than in females [7,18,20,24,27,36]. In studies examining the lengths of the right and left main bronchus in children [18,25] and adults [18,20,21,24,27,37] comparatively, the length of the left main bronchus is compared to the length of the right main bronchus and found to be larger.…”

“…The diameters of the right and left main bronchus were found to be larger in men than in women in all of the studies (Tables V and VI.). All studies measuring the transverse diameters of the right and left main bronchus in children [2,6,18,23,25,33,35] and adults [15,18,20,21,24,27,37,42] found that the right main bronchus was larger than the left main bronchus. The value of the main bronchus' transverse diameter was found to be greater than the transverse diameter of the left main bronchus.…”

In Vitro Measurements of Spiriva Respimat Dose Delivery in Mechanically Ventilated Tracheostomy Patients

“…The trachea model used in this study was designed based on anatomical dimensions obtained from morphometric studies of Korean cadavers (16,17) and computed tomography scans from New Zealand subjects. (18) The average dimensions of male subjects were used with a trachea length of 104 mm and anteroposterior diameter of 23 mm and a transverse diameter of 19 mm, as given in Figure 3.…”