Variation of Luminal Diameter of the Right Principal Bronchus in Different Age and Sex Group of Bangladeshi Cadaver

• Published in: Mymensingh medical journal : MMJ Vol. 27; no. 2; p. 358
• Main Authors: Nawshin, N, Mannan, S, Kamal, M F, Epsi, E Z, Ahmed, Z
• Format: Journal Article
• Language: English
• Published: Bangladesh 01.04.2018
• Subjects: Adolescent; Adult; Bangladesh; Bronchi - anatomy & histology; Cadaver; Child; Cross-Sectional Studies; Female; Humans; Male; Middle Aged; Trachea - anatomy & histology; Young Adult; Bangladesh
• ISSN: 2408-8757

The respiratory system is involved in the intake and exchange of oxygen and carbon dioxide between an organism and the environment which is essential for human survival. The bronchial tree includes the trachea, right and left principal bronchi and their branching upto alveoli. A common medical problem with the respiratory tract is acute respiratory tract infection (ARI) which is the leading killer of children under five. The aim of the present study was to find out the variation of the luminal diameter of right principal bronchus in Bangladeshi people. This cross sectional descriptive study was performed on 70 post mortem human right principal bronchus (44 of male and 35 of female) to find out the difference in luminal diameter of the right principal bronchus of Bangladeshi people in relation to age and sex in the department of Forensic Medicine, Mymensingh Medical College, Mymensingh, Bangladesh by purposive sampling technique from July 2014 to June 2015. All specimens were grouped into three categories, Group A (upto 20 years), Group B (21-40 years) and Group C (41-60 years) according to age. Dissection was performed according to standard autopsy techniques. The right principal bronchus was cut horizontally within 1cm of its origin and the average luminal diameter was measured with the help of a point divider and metric scale and was expressed in centimeter. All data were recorded in the pre-designed data sheet and statistical analysis was done using computer based statistical package, SPSS to evaluate the significance of variance between the different findings. In the present study the maximum luminal diameter of the right principal bronchus was 1.45, 1.55 and 1.70cm in age Group A, B and C respectively. The minimum luminal diameter of the right principal bronchus was 0.75cm in Group A, 0.80cm in Group B and 0.80cm in Group C. The mean±SD luminal diameter of the right principal bronchus was 1.21±0.23, 1.24±0.21 and 1.20±0.22cm in age Group A, B and C respectively. In most cases (87%) it was >1cm. The maximum mean luminal diameter of the right principal bronchus was in age Group B (1.24cm) and minimum was in age Group C (1.20cm). The mean difference of luminal diameter of the right principal bronchus between groups was statistically insignificant. The mean±SD luminal diameter of the right principal bronchus in male was 1.24±0.19, 1.30±0.18 and 1.23±0.21cm in age Group A, B and C respectively and 1.18±0.28, 1.16±0.23 and 1.12±0.24cm in female in age Group A, B and C respectively. It is evident from the results that the mean luminal diameter of the right principal bronchus in male was higher than that of female in all the groups but this mean difference between sexes in the group was statically non significant. The study would help to establish a normal standard data on the luminal diameter of the right principal bronchus of Bangladeshi people.