Abstract
INTRODUCTION: Recognition of anatomical variations in fissures and bronchial tree branching pattern is important for bronchoscopic procedures, lung resection surgery, intubation and endobronchial therapy MATERIAL AND METHODS: CT scan images of thorax taken in our hospital were studied .CT images where normal anatomy of lung and trachea was distorted were excluded CT were performed using 64 Slice Volume CT Scanner. Presence or absence of normal and accessory pulmonary fissures, continuity of each fissure was noted. Any variation from normal tracheo bronchial branching pattern and presence of accessory bronchus if any were noted. Data was compiled and analysed using Statistical Package for Social Science package. Descriptive statistics was used to describe the anatomical variations in fissure and tracheobronchial tree. RESULTS: A total number of 560 CT thorax were carefully reviewed. Fissural variations were detected in 22.9% (n=128). 54.7% (n=70) were in right lung and 45.35% (n=58) in left lung. 4.46% (n=25) of tracheo-bronchial variations were detected. The most common fissural variation noted was right incomplete oblique fissure 8.4% (n=47). Accessory fissure were noted in 7.32% cases (n=41). The most common accessory fissure was inferior accessory fissure in 3.92% cases (n=22). 4.1% cases (n=23) had variations in the right tracheobronchial tree. The most common was the right upper lobe 2 divisions which accounted for 43.5% (n=10). CONCLUSION: A right incomplete oblique fissure was the most common fissural abnormality . Inferior accessory fissure was the most common accessory fissure. Tracheobronchial variations were more common in the right side more so in the right upper lobe.
Published Version
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