vena hemiazygos accessoria
Học thuậtThân thiện
Definition
Noun: A small vein that is part of the venous system draining the thoracic wall. It is formed by the union of the fourth to seventh posterior intercostal veins on the left side of the body and typically empties into the azygos vein.
Usage
This term is used exclusively in specialized anatomical and medical contexts to describe a specific thoracic vein. * During the dissection, the medical students identified the vena hemiazygos accessoria ascending along the left side of the vertebral column. * The surgeon carefully avoided the vena hemiazygos accessoria while performing the thoracic procedure.
Advanced Usage
- Anatomical Variation: The precise point where the terminates can vary, sometimes connecting directly to the hemiazygos vein instead of the azygos vein.
- Clinical Relevance: Knowledge of the is important in interpreting thoracic imaging and during surgical interventions to prevent inadvertent injury.
Variants and Related Words
- Accessory hemiazygos vein: This is the direct English translation and a more common synonym in medical English.
- Superior hemiazygos vein: An alternative name used in some anatomical texts.
- Hemiazygos vein (vena hemiazygos): A larger, related vein into which the sometimes drains.
- Azygos vein (vena azygos): The major vein on the right side of the thoracic cavity, which is the primary termination point for the .
Synonyms
- Accessory hemiazygos vein
- Superior hemiazygos vein
Different Meanings
This term has no other meanings outside of its specific anatomical definition.
Noun
- a vein formed by the union of the 4th to 7th posterior intercostal veins; empties into the azygos vein