Veins Interlobar

**Interlobular veins** - in medical terminology, the name of one of two groups of veins that supply the lungs and form the so-called pulmonary vein system.

The main veins of the lung are those interlobar veins that cover at least two lobes of the lung, or are tributaries of these veins. They usually originate on either side of the lung root. From the main trunk of the pulmonary vein originate one interlobar vein of the right upper lobe, other interlobar and smaller sublobar (proper) veins. The latter also includes the so-called vein that accompanies the primary lobe. The terminal trunk of the main branch of the pulmonary artery emerging from the main trunk is called the bronchial artery, and the terminal trunk of its branch, which is a branch of the sublobar pulmonary vein, is called the bronchial aa.

The interlobar venous bed of the lungs is one of the main venous tracts of the thoracic cavity, has branches into all lobar and segmental veins of the lung, into the left atrium, subclavian and inferior vena cava, and into the left brachiocephalic and subclavian veins.

When studying interlobar veins, it becomes necessary to carry out a differential diagnosis. Most often it is necessary to distinguish the branches of the pulmonary veins from the branches of the arteries accompanying them, although their differentiation is not always easy. This is often explained by the overlap of the grooves of the interlobular arteries with the grooves of the interlobular vascular venous bed, the open location of the superior intercostal artery close to the gap between the semilunar dimples of the main veins and some of their reverse direction, superimposed on the course of the interlobular vein. Often the superior phrenic artery, crossing the groove of the interlobar, is mistaken for the interlobar.