Study Of Morphology Of Fissures Of Lung In Central Karnataka Region

The adult human lungs are two in number, the right & left lungs which are concerned with the aeration andexchange of gases. The right lung is comparatively larger & heavier and has 2 fissures oblique fissure & horizontalfissure & has 3 lobes in it. The left lung is longer & has only 1 fissure in it with 2 lobes.The present study was done on adult lungs in the Dept. of Anatomy SUIMS & R.C. Shimoga where only the obliquefissure was seen and horizontal fissure were missing in 7 out of 40 right lungs studied. Incomplete horizontalfissures were in 3 right lungs out of 40. Accessory fissure was seen in 1 specimen of right lung. Accessory fissureswere seen in 3 out of 40 left lungs studied. The presence of normal fissures in lung will help in proper expansionof lungs & also helps in localising the lesions to specific areas in the lungs. Incidence of absence of fissures inlungs varies from one geographical region to other region and is variable with the samples collected by differentworkers for the study.The incomplete fissures when present give a atypical appearance of the pleural effusion and may also alter theusual patterns of collapse of the lungs. The knowledge of such absence or incomplete fissures in lungs is helpfulfor anatomists, radiologists and surgeons operating on lungs during lobar resections of the lung

Variation In Lobes And Fissures Of Lung

Introduction: Lungs are the paired vital organs meant for respiration situated in the thoracic cavity on either sideof the heart. The right lung is divided into supe-rior, middle & inferior lobes by oblique and horizontal fissure.While the left lung is divided into supe-rior & inferior lobes by an oblique fissure. The fissures permit distensionof the lobes during respiration. The fissures may be complete, incomplete or absent.Aim: To find out the variations in fissures and lobes along with their patterns, in human lungs; collected fromcadavers.Result: Out of 50 right lung specimen, the horizontal fissure was absent in two cases whereas the horizontalfissure was incompletely seen in 18 specimens. Incomplete oblique fissure was seen in 7 right sided lungs. Wereported accessory fissures and accessory lobes in 14 specimens. The oblique fissure was absent in 4 left lungsand it was incomplete in 14 lungs. Accessory fissures and lobes were present in 8 specimens.Conclusion: Knowledge of any variations is necessary in performing segmental resection and lobectomy. Accessoryfissures indicate persistence of prenatal fissures.