| 词条 | Testicular vein |
| 释义 |
| Name = Testicular vein | Latin = Vena testicularis, vena spermatica | Image = Gray590.png | Caption = Spermatic veins. | Image2 = | Caption2 = | DrainsFrom = | Source = Pampiniform plexus | DrainsTo = Inferior vena cava, left renal vein | Artery = Testicular artery }} The testicular vein (or spermatic vein), the male gonadal vein, carries deoxygenated blood from its corresponding testis to the inferior vena cava or one of its tributaries. It is the male equivalent of the ovarian vein, and is the venous counterpart of the testicular artery. StructureIt is a paired vein, with one supplying each testis:
The veins emerge from the back of the testis, and receive tributaries from the epididymis; they unite and form a convoluted plexus, called the pampiniform plexus, which constitutes the greater mass of the spermatic cord; the vessels composing this plexus are very numerous, and ascend along the cord, in front of the ductus deferens. Below the subcutaneous inguinal ring, they unite to form three or four veins, which pass along the inguinal canal, and, entering the abdomen through the abdominal inguinal ring, coalesce to form two veins, which ascend on the Psoas major, behind the peritoneum, lying one on either side of the internal spermatic artery. These unite to form a single vein, which opens, on the right side, into the inferior vena cava (at an acute angle), on the left side into the left renal vein (at a right angle). The spermatic veins are provided with valves. The left spermatic vein passes behind the iliac colon and is thus exposed to pressure from the contents of that part of the bowel. Clinical significanceSince the left testicular vein goes all the way up to the left renal vein before it empties, this results in a higher tendency for the left testicle to develop varicocele because of the gravity working on the column of blood in this vein. Moreover, the left renal vein passes between the abdominal aorta and the superior mesenteric artery en route to the inferior vena cava, and is often compressed by an enlarged superior mesenteric artery—this is called the "Nutcracker effect".[1] Additional imagesReferences{{Gray's}}1. ^{{cite journal |vauthors=Ahmed K, Sampath R, Khan MS |date=April 2006 |title=Current trends in the diagnosis and management of renal nutcracker syndrome: a review |url=http://www.ejves.com/article/S1078-5884%2805%2900521-6/fulltext |journal=European Journal of Vascular and Endovascular Surgery |publisher=European Society for Vascular Surgery |volume=31 |issue=4 |pages=410–416 |pmid=16431142 |doi=10.1016/j.ejvs.2005.05.045}} External links
2 : Veins of the torso|Scrotum |
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