What Is the Difference Between the Renal Artery and Renal Vein?
Renal vein, a branch of the inferior vena cava. The renal vein starts from the renal hilum, and there are 3 to 5 branches that form a thick vein trunk. The left side is slightly longer. The renal vein is located in front of the renal artery and runs horizontally inwardly and is injected into the inferior vena cava. Guide blood from the kidneys and adrenal glands into the blood vessels of the posterior vena cava. A pair, thicker, accompanied by an artery of the same name, with a long left renal vein; the ventral side of the kidney extends inward and rearward; vein. There was adrenal vein infusion on the way.
- Chinese name
- Renal vein
- Foreign name
- renal veins
- Location
- Left renal vein is longer than right
- Connected
- Inferior vena cava
- Renal vein, a branch of the inferior vena cava. The renal vein starts from the renal hilum, and there are 3 to 5 branches that form a thick vein trunk. The left side is slightly longer. The renal vein is located in front of the renal artery and runs horizontally inwardly and is injected into the inferior vena cava. Guide blood from the kidneys and adrenal glands into the blood vessels of the posterior vena cava. A pair, thicker, accompanied by an artery of the same name, with a long left renal vein; the ventral side of the kidney extends inward and rearward; vein. There was adrenal vein infusion on the way.
Anatomy of the renal vein:
- The renal veins are a pair of large veins that run in front of the renal arteries, about 1 to 2 of the lumbar vertebral body plane, and are injected into the inferior vena cava at a slight right angle. The length of the left renal vein is about three times that of the right renal vein (7.5 cm on the left and 2.5 cm on the right; it has been reported that the average length of the left renal vein is 5.41 cm and the right side is 1.62 cm); The inferior part of the duodenum and the lateral part of the pancreatic head before the menstrual flow, and the inferior vena cava between the right renal arteries. It may receive a right testicular (or ovarian) vein. After initiation of the left renal vein, it travels to the right through the back of the pancreatic body and the splenic vein, and then passes below the beginning of the superior mesenteric artery and passes into the inferior vena cava before the abdominal aorta; its entry point is generally slightly higher than that on the right. The left testicular (ovary) vein is injected into the left renal vein from below; the left adrenal vein is injected into the left renal vein slightly from the upper side. In addition, the renal vein also accepts several small branches such as renal sac vein, ureter vein. Renal veins can be connected to the lumbar veins through small branches such as the renal sac vein. It is generally believed that the anastomosis of the lateral renal branches of the left renal vein is richer, which can be used to establish a collateral circulation between portal veins.
- Most renal veins were one (88.3%). But there may be two or more. When there are two branches of the left renal vein, sometimes they pass through the front and back of the abdominal aorta to form a venous ring called the renal ring. Sometimes the left renal vein runs into the inferior vena cava via the left renal artery and the abdominal aorta. Some of the renal veins and their genera have valves in about 38.75%.
Anatomical variation and clinical significance of left renal vein:
- The normal left renal vein (LRV) trunk consists of 2 to 4 branches that merge into one branch before exiting the renal hilum, and travels in front of the renal artery and crosses the mesentery. The angle between the superior and abdominal aorta flows into the left wall of the inferior vena cava to the right. Compared with the right renal vein, LRV is longer and more branched, with a length of 7.5 cm (6-10 cm), which is three times the length of the right renal vein (RLRV). The LRV also collects the left adrenal vein, the left gonadal vein, and the lumbar vein Wait for many small branch veins.
- Because LRV has a long stroke and many branches, its related research is helpful for preoperative evaluation of kidney surgery and diagnosis of related diseases. At present, research on CT three-dimensional vascular reconstruction before renal surgery is mainly focused on arteries, but the variation of veins during surgery is also important. Detailed analysis of veins is needed, especially for patients undergoing renal laparoscopic surgery due to the small surgical field and surgical exposure. Limitations, a comprehensive and meticulous assessment of renal blood vessels before surgery helps to separate blood vessels and avoid vascular damage.
- LRV variants are usually asymptomatic, but both the RLRV trunk or the posterior branch of CLRV travel between the abdominal aorta and the spine, and are easily squeezed by both to cause LRV hypertension. It is clinically called posterior nutcracker syndrome. Symptoms such as low back pain, hematuria or proteinuria, or only manifested repeatedly with unexplained microscopic hematuria. LRV compression can cause gonad varicose veins, males show testicular varicose veins, and females show left ovarian venous insufficiency and pelvic vein congestion.