1Private Practice, Vadodara, Gujarat.
2Professor and Head, Department of Anatomy, Medical College, Baroda, Vadodara, Gujarat
Online published on 21 September, 2015.
Lungs, the pair of respiratory organs are made up of independent functional units called bronchopulmonary segments, each having its own segmental/tertiary bronchus. Not much significant evidence is available for the variations in branching of secondary bronchi.
The present study was undertaken with an aim to discover the variations in the branching pattern of secondary bronchi of both the lungs.
Ten casts - 6 male specimens and 4 female specimens, of tracheobronchial tree prepared from silicone gel using luminal cast plastination method were used for this study. The pattern of division given in Gray's textbook of Anatomy (35th edition) was used as a reference.
The variations were found in 4 out of 10 (40%) specimens on right side and 3 out of 10(30%) specimens on left side. Moreover, in males, 3 out of 6 (50%) on right side and 1 out of 6 on left side (16.67%). In females 25% on right side and 50% on left side varied.
Thus the study indicated that the variations in the branching pattern of secondary bronchi occurs on both the sides in both sexes in significant percentages.
The sample size of this study was too small.
It is suggested that the present study should be extrapolated with large sample size.
secondary bronchi, tertiary bronchi
