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Updated: May 26, 2025
The middle coat contracts and retracts, and the internal, because of its elasticity, curls up in the interior of the vessel, forming a valvular obstruction to the blood-flow. In most cases this results in the formation of a thrombus which occludes the vessel. In some cases the blood-pressure gradually distends the injured segment of the vessel wall and leads to the formation of an aneurysm.
The changes in the circulation occurring in inflammation are as follows: An increase in the rate of the blood-flow through the blood-vessels of the part and their dilation; diminished velocity followed by the blood-flow becoming entirely suspended; following the retardation or suspension of the blood stream, white blood-corpuscles accumulate along the walls of the small veins and capillaries; white and red blood-corpuscles migrate from the vessels into the neighboring tissue, and blood-serum transudes through the walls of the vessels, forming the inflammatory swellings.
'We had no witnesses, put in Hubert; 'and both aimed our best. I wonder he sent you to look for me. 'A momentary weakness, no doubt, rejoined the vicar drily. I made my way among the trees and found you lying there, unconscious. I made some attempt to stop the blood-flow, then picked you up; it seemed better, on the whole, than leaving you on the wet grass an indefinite time.
Trembling, palpitation, stammering, blushing not to speak of the pathological states which occur in neurosis are due to modifications and changes in the blood-flow, in muscular action and in the working of the vital organs. These changes are not voluntary and conscious ones, they are determined by the Unconscious and come to us often with a shock of surprise.
Then he tore the bandanna handkerchief from his neck and bound up the wound, winding the bandage as tightly as his strength permitted to check the blood-flow. "What is it?" asked Jack, over his shoulder. "Indians the 'Paches are out. I'm hit," gasped Dick. He crawled painfully and slowly to Jack's side, dragging his leg after him.
When the Major and his troop rode into the town they found it quiet under the weight of a heavy dread. They were looked upon from windows, where men were posted, waiting; and obeying a shouted instruction, the Major led his men to a long, low shed not far from the scene of expected blood-flow, to stable their horses.
"It is easy to see, Sir Henry, that the wound was made by a thin-bladed knife, but why do you think it was also round-headed?" asked Superintendent Galloway. "Might it not have been a sharp-pointed one?" "Or even a dagger?" suggested Mr. Cromering. "Certainly not a dagger. The ordinary dagger would have made a wider perforation with a corresponding increase in the blood-flow.
All accidental wounds in domestic animals become more or less infected by irritating microorganisms. The following symptoms occur in local inflammation. Increased heat in the part is an important symptom. It is due to the increased blood-flow to the part. Because of the pigmented, hairy skin of domestic animals, redness is of little value in locating superficial inflammation.
Amputation of the limb is indicated in cases complicated by suppuration, by secondary hæmorrhage after excision or ligation, or by gangrene. Amputation at the shoulder was performed by Fergusson in a case of subclavian aneurysm, as a means of arresting the blood-flow through the sac.
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