Renal vein
The vena renalis (lat. For 'renal vein') is a pair of veins in the abdominal cavity for blood drainage from the kidneys . Both renal veins are accompanying veins of the renal artery and opening into the lower vena cava ( vena cava inferior , with animals V. cava ). The inferior vena cava with the two renal veins and the aorta with the two renal arteries form mutually offset crosses, with the venous cross lying on the right below the arterial cross. Multiple renal veins occur in 35% of human individuals.
The human left renal vein ( vena renalis sinistra ) is about 7.5 cm longer than the right ( vena renalis dextra ), which is only about 2.5 cm long. It also absorbs the blood from the left ovarian vein or testicular vein . As an anatomical variant in humans, in 3% of cases it runs completely or partially behind the aorta instead of in front of it.
Another peculiarity of the left renal vein is that it is located in "vascular forceps": it lies in front of the abdominal aorta and behind the superior mesenteric artery . If the arterial pressure increases, this can lead to compression of the vein and thus to a drainage disorder of the left kidney ( nutcracker syndrome ).
literature
- Walther Graumann: Compact textbook anatomy. 4. Sensory systems, skin, CNS. Peripheral pathways . Verlag Schattauer Verlag, 2005, ISBN 9783794520640 , p. 619.
- Uwe Gille: Cardiovascular and immune system, Angiologia. In: Salomon, F.-V. ua (Hrsg.): Anatomie für die Tiermedizin. Enke-Verlag Stuttgart, 2nd edition 2008, pp. 404–463. ISBN 978-3-8304-1075-1
