| dbo:abstract |
Collateral circulation is the alternate circulation around a blocked artery or vein via another path, such as nearby minor vessels. It may occur via preexisting vascular redundancy (analogous to engineered redundancy), as in the circle of Willis in the brain, or it may occur via new branches formed between adjacent blood vessels (neovascularization), as in the eye after a retinal embolism or in the brain when moyamoya occurs. Its formation may be provoked by pathological conditions such as high vascular resistance or ischaemia. An example of the usefulness of collateral circulation is a systemic thromboembolism in cats. This is when a thrombotic embolus lodges above the external iliac artery (common iliac artery), blocking the external and internal iliac arteries and effectively shutting off all blood supply to the hind leg. Even though the main vessels to the leg are blocked, enough blood can get to the tissues in the leg via the collateral circulation to keep them alive. (en) En médecine, une circulation collatérale est une circulation de suppléance qui se développe après l'obstruction chronique d'un vaisseau, ou en cas d'augmentation chronique de la résistance au flux sanguin. Un réseau de collatéralité peut également suppléer à l'absence congénitale d'un vaisseau. Une circulation collatérale peut être artérielle ou veineuse. (fr) Kollateraler kallar man de blodkärl som tas i anspråk för att säkerställa blodförsörjningen till ett organ, när dettas huvudkärl blivit avstängt av t. ex. en blodpropp. (sv) |
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| dbp:name |
Collateral circulation (en) |
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dbc:Fault_tolerance dbc:Angiology |
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owl:Thing wikidata:Q4936952 dbo:AnatomicalStructure |
| rdfs:comment |
En médecine, une circulation collatérale est une circulation de suppléance qui se développe après l'obstruction chronique d'un vaisseau, ou en cas d'augmentation chronique de la résistance au flux sanguin. Un réseau de collatéralité peut également suppléer à l'absence congénitale d'un vaisseau. Une circulation collatérale peut être artérielle ou veineuse. (fr) Kollateraler kallar man de blodkärl som tas i anspråk för att säkerställa blodförsörjningen till ett organ, när dettas huvudkärl blivit avstängt av t. ex. en blodpropp. (sv) Collateral circulation is the alternate circulation around a blocked artery or vein via another path, such as nearby minor vessels. It may occur via preexisting vascular redundancy (analogous to engineered redundancy), as in the circle of Willis in the brain, or it may occur via new branches formed between adjacent blood vessels (neovascularization), as in the eye after a retinal embolism or in the brain when moyamoya occurs. Its formation may be provoked by pathological conditions such as high vascular resistance or ischaemia. (en) |
| rdfs:label |
Collateral circulation (en) Circulation collatérale (fr) Kollateral (medicin) (sv) |
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Collateral circulation (en) |
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