collateral circulation effect

collateral circulation effect,

n 1. the opening up of normally closed blood vessels that connect arteries, thus providing a path for blood to flow around occlusions, such as occur in stroke or myocardial ischemia.
2. one of the physiologic doctrines used in hydrotherapy to modify blood circulation in an area of the body that has a single artery supplying blood to the deep as well as the superficial areas. A cold application causes a decrease in blood flow to the superficial areas and a simultaneous increase to the deeper areas and a hot application has the opposite effect.
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Collateral circulation effect.
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