. The principles of surgery . ased,by the attendant exudation. If action proveslight, the swelling soon begins to subside;exudation having ceased, and absorption be-gun. And, then, discoloration assumes themost prominent place among the signs of theinjury ; the superficially infiltrated blood, asit undergoes absorbent change, causing a va-riation of hue—from the natural colour, some-what heightened, to black or dark blue, thenceto violet, from that to green, and afterwardsto yellow. Gradually, extravasation and exu-dation disappear; and the part is restored,almost, to its normal a
. The principles of surgery . ased,by the attendant exudation. If action proveslight, the swelling soon begins to subside;exudation having ceased, and absorption be-gun. And, then, discoloration assumes themost prominent place among the signs of theinjury ; the superficially infiltrated blood, asit undergoes absorbent change, causing a va-riation of hue—from the natural colour, some-what heightened, to black or dark blue, thenceto violet, from that to green, and afterwardsto yellow. Gradually, extravasation and exu-dation disappear; and the part is restored,almost, to its normal an arterial branch have been ruptured, of considerable size, tumourforms rapidly ; and is distinctly fluctuating; consisting of escaped blood ;yet in the fluid state. After a time, partial coagulation takes place; theclot being arranged at the circumference of the swelling, and the fluidportion occupying the centre. It is most important that this be distin-guished from acute abscess; for it requires very different Fig. 240. Bruise of the scrotum ; a form of hematocele.— / T B E A T M ENT OF B It UISE. 691 There need be no difficulty. The one is immediate, the other of secondaryformation; the abscess is necessarily preceded and attended by all theusual symptoms of inflammation, the other is not. The same process ofdecadence takes place, as in ordinary bruise ; swelling ceases ; discolo-ration becomes marked and varied ; extravasation, both solid and fluid,is absorbed ; and, ultimately, the normal colour and form are bothrestored. When an artery of some importance has given way, false aneurismmay form, and follow the ordinary course. Or the vessel may speedilybecome obliterated, at the ruptured part, as in the more ordinary casejust mentioned. The extravasation then gradually disappears, in theusual way. The indications of treatment in bruise are, like those in sprain, toavert inflammatory action, to promote absorption of extravasation andexudation, and to restore
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