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The primary infection is usually in a wound for example, a compound fracture but cases occur in which the point of entrance of the bacteria is not discoverable. The dissemination of the organisms takes place through the medium of infected emboli which form in a thrombosed vein in the vicinity of the original lesion, and, breaking loose, are carried thence in the blood-stream.
#Repair of Veins.# The process of repair in veins is the same as that in arteries, but the thrombosed area may become canalised and the circulation through the vessel be re-established. #Prevention of Hæmorrhage.# Whenever possible, hæmorrhage should be controlled by digital compression of the main artery supplying the limb rather than by a tourniquet.
Varicose ulcers may also originate from the bursting of a small peri-phlebitic abscess. Varicose veins in immediate relation to the base of a large chronic ulcer usually become thrombosed, and in time are reduced to fibrous cords, and therefore in such cases hæmorrhage is not a common complication.
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