Right lower lobe segmental bronchi
Segmental bronchi · Superior Medial basal Anterior basal Lateral basal Posterior basal
Five segmental bronchi. The superior (apical) segmental bronchus points backwards from the top of the lower lobe, and the four basal bronchi (medial, anterior, lateral, posterior) fan out to the diaphragmatic surface. The posterior basal segment is the most dependent part of the tree in the erect lung; the superior segment is the most dependent when supine.
Traced from the start
- Trachea
- Right main bronchus
- Right lower lobe bronchus
- Right lower lobe segmental bronchi
Detail
- Segments
- Superior (6), medial basal (7), anterior basal (8), lateral basal (9), posterior basal (10)
- Superior segment
- Opens posteriorly, opposite the middle lobe bronchus; the lowest point of the airway when lying flat
- Posterior basal segment
- The lowest point of the airway when erect
When it goes wrong
Aspiration in a supine, unconscious, post-ictal or intoxicated patient
Superior segment of the right lower lobe (and posterior segment of the upper lobe); foul sputum and an anaerobic lung abscess with an air-fluid level after one to two weeks
Aspiration or inhaled foreign body while sitting or standing
Posterior basal segment of the right lower lobe
Postural drainage in bronchiectasis or cystic fibrosis
Each basal segment is drained by tipping the patient so that its segmental bronchus points downwards
Practise this structure
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