https://www.wikidoc.org/index.php?title=Anastomosis&feed=atom&action=historyAnastomosis - Revision history2024-03-28T16:05:57ZRevision history for this page on the wikiMediaWiki 1.40.0https://www.wikidoc.org/index.php?title=Anastomosis&diff=668435&oldid=prevWikiBot: Bot: Automated text replacement (-{{SIB}} + & -{{EH}} + & -{{EJ}} + & -{{Editor Help}} + & -{{Editor Join}} +)2012-08-08T22:09:33Z<p>Bot: Automated text replacement (-{{SIB}} + & -{{EH}} + & -{{EJ}} + & -{{Editor Help}} + & -{{Editor Join}} +)</p>
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==Overview==<br />
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'''Anastomosis''' (plural '''anastomoses''') refers to a form of network in which streams both branch out and reconnect. The term is used in medicine, biology, and geology.<br />
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==Medicine==<br />
Anastomosis is the surgical connection of two structures.<ref>{{cite|author=Gylys, Barbara A. and Mary Ellen Wedding|title=Medical Terminology Systems|publisher=F.A. Davis Company|date=2005}}</ref> It commonly refers to connections between [[blood vessel]]s or connections between other tubular structures such as loops of [[intestine]]. In [[circulatory anastomosis]], many arteries naturally anastomose with each other. For example: the [[inferior epigastric artery]] and [[superior epigastric artery]]. In surgery, [[surgical anastomosis]] occurs when a segment of intestine is resected and the two remaining ends are sewn or stapled together (anastomosed). The procedure is referred to as intestinal anastomosis.<br />
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[[Pathology|Pathological]] anastomosis results from trauma or disease and may involve [[vein]]s, [[artery|arteries]], or intestines. These are usually referred to as [[fistula]]s. In the cases of veins or arteries, traumatic fistulas usually occur between artery and vein. Traumatic intestinal fistulas usually occur between two loops of intestine (enetero-enteric fistula) or intestine and [[skin]] (enterocutaneous fistula). [[Portacaval anastomosis]], by contrast, is an anastomosis between a vein of the [[portal circulation]] and a vein of the [[systemic circulation]], which allows blood to bypass the liver in patients with [[portal hypertension]], often resulting in [[hemorrhoids]], [[esophageal varices]], or [[caput medusae]].<br />
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==Biology==<br />
In [[evolution]], anastomosis is a recombination of evolutionary lineage. Conventional accounts of evolutionary lineage present themselves as the simple branching out of species into novel forms. Under anastomosis, species might recombine after initial branching out, such as in the case of recent research which shows that humans and chimpanzees may have interbred after an initial branching out.<ref>{{cite journal | last = Patterson | first = Nick | coauthors = ''et al.'' | year = 2006 | month = May | title = Genetic evidence for complex speciation of humans and chimpanzees | journal = Nature | volume = 441 | pages = 1103–1108 | doi = 10.1038/nature04789 | url = http://www.nature.com/nature/journal/v441/n7097/abs/nature04789.html | accessdate = 2006-09-18 }}</ref> A second case in which the idea of anastomosis finds application is in the theory of [[Symbiogenesis]], in which new forms of life (species) are seen to emerge from the formation of novel symbiotic relationships.<br />
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==References==<br />
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[[Category:Surgery]]<br />
[[Category:Cardiovascular system]]<br />
[[Category:Digestive system]]<br />
[[Category:Evolution]]<br />
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