Segmental Lung Anatomy

Veins and lymphatic vessels drain along the edges of the segment. The lingula on the left is part of the left upper lobe and is the equivalent.

Lungs Bp Segments

Medial and lateral easy to remember m iddle l obe.

Segmental lung anatomy. Each lung is divided into lobes and each lobe is divided into segments. The upper lobes contains 3 segments the middle lobe lingula 2 and the lower lobes 5. You should be familiar with this anatomy already.

The right lung has 3 lobes divided into 10 segments. We will learn the anatomy of the tracheobronchial tree and the segments together. Knowledge of bronchopulmonary segment anatomy is important for understanding and interpreting radiographs and other medical images of the lungs especially when needed as reference for surgical resection of diseased lung segments.

It is only meant to simplify the anatomic relation of segments to one another within each lobe and not their exact anatomic locations. Segmental and subsegmental pulmonary arteries vary considerably in the location of their origins in whether they arise as common trunks with other arteries or as separate arteries and in their number. There is some form of segmental symmetry between the right and left lungs even though the left lung is smaller and only contains two lobes.

The bronchopulmonary segment is a functionally and anatomically discrete portion of lung supplied by its own segmental bronchus and artery. 1 study figure s1 1. This diagram may help simplify the segmental anatomy of the lung and the pulmonary arteries.

In general each lung has 10 segments. Removal of a bronchopulmonary segment is known as segmentectomy. The right upper lobe has apical posterior and anterior segments middle lobe has medial and lateral segments and the lower lobe has superior apical and 4 basal segments anterior medial posterior and lateral.

But when churchill in 1939 successfully removed a segment of the lower lobe for bronchiectasis a new emphasis was created. Each segment is supplied by its own bronchus which is called a segmental bronchus. As long as the surgeons efforts were confined to resection of a lobe or of a whole lung the importance of segmental anatomy was not fully appreciated.

The middle lobe on the right has 2 segments. These arteries branch from the pulmonary and bronchial arteries and run together through the center of the segment. With this basic symmetric anatomy shared between the lungs there are a few differences that can be described.

Knowledge of segmental anatomy is essential for the bronchoscopist who wants to accurately describe the location of endobronchial lesions. A bronchopulmonary segment is a portion of lung supplied by a specific segmental bronchus and arteries.

Segmental Anatomy Of The Lungs Anterior And Posterior Views