Renal artery
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| Artery: Renal artery | |
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| Human kidneys viewed from behind with spine removed | |
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| 1. Renal pyramid 2. Efferent artery 3. Renal artery 4. Renal vein 5. Renal hilum 6. Renal pelvis 7. Ureter 8. Minor calyx 9. Renal capsule 10. Inferior renal capsule 11. Superior renal capsule 12. Afferent vein 13. Nephron 14. Minor calyx 15. Major calyx 16. Renal papilla 17. Renal column | |
| Latin | arteria renalis |
| Gray's | subject #154 610 |
| Supplies | kidneys |
| Source | abdominal aorta |
| Branches | inferior suprarenal artery, segmental arteries |
| Vein | renal vein |
| MeSH | Renal+Artery |
| Dorlands / Elsevier | a_61/12155727 |
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The renal arteries normally arise off the side of the abdominal aorta, immediately below the superior mesenteric artery, and supply the kidneys with blood. Each is directed across the crus of the diaphragm, so as to form nearly a right angle with the aorta.
The renal arteries carry a large portion of total blood flow to the kidneys. Up to a third of total cardiac output can pass through the renal arteries to be filtered by the kidneys.
The arterial supply of the kidneys is variable and there may be one or more renal arteries supplying each kidney. It is located above the renal vein.
Asymmetries before reaching kidney
Due to the position of the aorta, the inferior vena cava and the kidneys in the body, the right renal artery is normally longer than the left renal artery.
- The right passes behind the inferior vena cava, the right renal vein, the head of the pancreas, and the descending part of the duodenum.
- The left is somewhat higher than the right; it lies behind the left renal vein, the body of the pancreas and the lienal vein, and is crossed by the inferior mesenteric vein.
At kidney
Before reaching the hilus of the kidney, each artery divides into four or five branches; the greater number of these lie between the renal vein and ureter, the vein being in front, the ureter behind, but one or more branches are usually situated behind the ureter.
Each vessel gives off some small inferior suprarenal branches to the suprarenal gland, the ureter, and the surrounding cellular tissue and muscles.
One or two accessory renal arteries are frequently found, more especially on the left side they usually arise from the aorta, and may come off above or below the main artery, the former being the more common position. Instead of entering the kidney at the hilus, they usually pierce the upper or lower part of the gland.
Diseases of the renal arteries
Renal artery stenosis, or narrowing of one or both renal arteries will lead to hypertension as the affected kidneys release renin to increase blood pressure to preserve perfusion to the kidneys. RAS is diagnosed with an MRA (magnet-resonance scan) of abdomen. It is treated with the use of balloon angioplasty and stents, if necessary.
Atherosclerosis can also affect the renal arteries and can lead to poor perfusion of the kidneys leading to reduced kidney function and, possibly, renal failure.
Additional images
 Frontal section through the kidney |
 Abdominal portion of the sympathetic trunk, with the celiac and hypogastric plexuses. |
 The posterior surfaces of the kidneys, showing areas of relation to the parietes. |
 Front of abdomen, showing surface markings for arteries and inguinal canal. |
External links
- MedlinePlus Image 9818
- SUNY Labs 40:11-0105 - "Posterior Abdominal Wall: Branches of the Abdominal Aorta"
Arteries of torso - abdomen | |||||||
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| AA: Anterior |
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| AA: Posterior | visceral: middle suprarenal – renal (inferior suprarenal) – testicular/ovarianparietal: inferior phrenic (superior suprarenal) – lumbar – median sacral terminal: common iliac (IIA, EIA) | ||||||
| IIA: Anterior |
(superior vesical,
to ductus deferens) –
inferior vesical –
middle rectal –
uterine
(azygos of the vagina) –
vaginal –
obturator
(anterior branch,
posterior branch) –
internal pudendal
(inferior rectal,
perineal,
artery of the urethral bulb,
urethral,
deep artery of the penis,
dorsal artery of the penis) –
inferior gluteal
(accompanying of ischiadic nerve,
crucial anastomosis)
| ||||||
| IIA: Posterior | |||||||
| EIA | |||||||
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
