A Treatise on the Process Employed by Nature in Suppressing the Hemorrhage from Divided and Punctured Arteries: And on the Use of the Ligature; Concluding with Observations on Secondary Hemorrhage, the Whole Deduced from an Extensive Series of Experiments

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Longman, Hurst, Rees, Orme, and Brown, 1810 - 237 sider
 

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Side 57 - This lymph fills up the extremity of the artery, 13 situated between the internal and external coagula of blood, is somewhat intermingled with them, or adheres to them, and is firmly united all round to the internal coat of the artery.
Side 55 - An impetuous flow of blood, a sudden and forcible retraction of the artery within its sheath, and a slight contraction of its extremity, are the immediate and almost simultaneous effects of its division. The natural impulse, however, with which the blood is driven on, in some measure counteracts the retraction, and resists the contraction of the artery. The blood is effused into the cellular substance between the artery and its sheath, and passing through that canal of the sheath which had been...
Side 170 - But in this chapter he remarks that "it appears highly improbable that a broad flat ligature should make such a wound in the internal and middle coats of an artery as is most favorable. to adhesion, because it is scarcely possible to tie it smoothly around the artery, which is very likely to be thrown into folds, or to be puckered by it, and consequently to have an irregular, bruised wound made in its middle and internal coats. And even if it should make a proper wound...
Side 56 - ... it up from the circumference to the centre. " A certain degree of obstruction to the hemorrhage, which . results from the effusion of blood into the surrounding cellular membrane, and between the artery and its sheath, but particularly the diminished force and velocity of the circulation, occasioned by the hemorrhage, and the speedy coagulation of the blood, which is a well known consequence of such diminished action of the vascular, system, most essentially contribute to the accomplishment of...
Side 56 - The retracting artery leaves the internal surface of the sheath uneven by lacerating or stretching the cellular fibres that connected them. These fibres entangle the blood as it flows, and thus the foundation is laid for the formation of a coagulum at the mouth of the artery, and which appears to be completed by the blood, as it passes through this canal of the sheath, gradually adhering and coagulating around its internal surface, till it completely fills it up from the circumference to the centre.
Side 56 - A coagulum then, fonncd at the mouth of the artery, and within its sheath, and which I have distinguished in the experiments by the name of the external coagulum, presents the first complete barrier to the effusion of blood. This...
Side 57 - The mouth of the artery heing no longer pervious, nor a collateral branch very near it, the blood just within it is at rest, coagulates, and forms, in general, a slender conical coagulum, which neither fills up the canal of the artery, nor adheres to its sides, except by a small portion of the circumference of its base, which lies near the extremity of the vessel. This coagulum is distinct from the former, and I have called it the internal coagulum.
Side 162 - ... of an artery, he says, that " the formation of this coagulum is of little consequence ; for soon after the application of the ligature the extremity of the artery begins to inflame, and the wounded internal surface of its canal being kept in close contact by the ligature adheres and converts this portion of the artery into an impervious, and at first, slightly conical sac. It seems to be entirely owing to the effusion of lymph by which this adhesion is effected, that the coagulum of blood formed...
Side 59 - ... of other changes which the artery gradually undergoes. Its obliterated extremity no longer allowing the blood to circulate through it, the portion which lies between it and the first lateral branch is no more distended and excited to action as formerly ; but gradually contracts, till at length its cavity is completely obliterated, and its condensed tunics assume a ligamentous appearance.
Side 57 - ... coagula of blood, is somewhat intermingled with them, or adheres to them, and is firmly united all round to the internal coat of the artery. • The permanent suppression of the hemorrhage chiefly depends on this coagulum of lymph ; but while it is forming within, the extremity of the artery is...

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