segmental pulmonary vein

A vein that is tributary of the main pulmonary veins and drains oxygenated blood from a segment of the lung.

Loại Bone
Cấu trúc cha lung blood vessel
FMA ID 9411

Câu hỏi thường gặp

What is a segmental pulmonary vein?
A segmental pulmonary vein is a pulmonary vein that drains oxygenated blood from a specific bronchopulmonary segment of the lung. It serves as a tributary of the main pulmonary veins and carries blood back toward the left atrium.
How do segmental pulmonary veins relate to the bronchopulmonary segments?
Each bronchopulmonary segment of the lung is supplied by a segmental bronchus and artery and drained by a segmental vein. However, unlike the bronchi and arteries that travel together centrally, the segmental veins often run in the intersegmental planes, at the boundaries between segments, making them useful landmarks for surgical segmentectomy.
Where do segmental pulmonary veins ultimately drain?
Segmental pulmonary veins drain into lobar pulmonary veins, which then join to form the main pulmonary veins. Typically two main pulmonary veins on each side (superior and inferior) return blood from the lungs to the left atrium, where oxygenated blood enters the systemic circulation.
How are segmental pulmonary veins used as surgical landmarks?
During anatomic segmentectomy (removal of a single lung segment), surgeons use the intersegmental pulmonary veins as boundaries between segments. Identifying and preserving the intersegmental vein helps delineate the correct plane of resection, minimizing damage to adjacent segments while completely removing the target segment.
Can the number and arrangement of segmental pulmonary veins vary?
Yes, pulmonary venous anatomy is highly variable among individuals. The number, size, and drainage pattern of segmental veins can differ significantly, and anomalous pulmonary venous connections can occur. This variability is clinically important in thoracic surgery and in procedures such as pulmonary vein isolation for atrial fibrillation ablation.

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Educational Disclaimer

This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.

Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.