Hilum Of Lung
ROOT (HILUM) OF THE LUNG
- Hilum (root) of the lung connects is the medial surface of the lung to the mediastinum.
- It comprises structures entering or coming out of the lung at the hilum.
- It lies opposite the T5 – T7 vertebrae.
- Arrangement of structure in the hilum is as follows-
1. Anterior to posterior (same on both side):
- Superior pulmonary vein
- Pulmonary artery
- Bronchus
2. Superior to inferior–
- Right: i) Eparterial bronchus (superior most) ii) Pulmonary artery, iii) Hyparterial bronchus, iv) Inferior pulmonary vein (inferior most)
- Left: i) Pulmonary artery (superior most), ii) Primary/ Principal bronchus iii) inferior pulmonary vein (inferior most).
- On right side, hilum of the lung is arched by azygous vein & on left side by arch of aorta.
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RELATIONS OF THE HILUM (ROOT) |
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ANTERIOR |
POSTERIOR |
SUPERIOR |
INFERIOR |
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Common on both sides
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Common on both sides
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On right side
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On right side
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On left side
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On left side
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Exam Question
- At hilum of lung Primary/Principal bronchus enters.
- Posterior relation of hilum of lung is Vagus nerve.
- he hilum of the right lung is arched by Azygous vein.
- Pulmonary artery is the uppermost structure in left lung hilum.
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