The principles of surgery . the swelling soon begins to sub-side ; exudation having ceased, and absorptionbegun. And, then, discoloration assumes themost prominent place among the signs of theinjury ; the superficially infiltrated blood, as itundergoes absorbent change, causing a varia-tion of hue—from the natural color, somewhat heightened, to black or dark blue, thence to violet, from that to green,and afterwards to yellow. Gradually extravasation and exudationdisappear, and the part is restored, almost to its normal condition. If an arterial branch have been ruptured, of considerable size,
The principles of surgery . the swelling soon begins to sub-side ; exudation having ceased, and absorptionbegun. And, then, discoloration assumes themost prominent place among the signs of theinjury ; the superficially infiltrated blood, as itundergoes absorbent change, causing a varia-tion of hue—from the natural color, somewhat heightened, to black or dark blue, thence to violet, from that to green,and afterwards to yellow. Gradually extravasation and exudationdisappear, and the part is restored, almost to its normal condition. If an arterial branch have been ruptured, of considerable size, tumorforms rapidly; and is distinctly fluctuating ; consisting of escaped blood,yet in the fluid state. After a time, partial coagulation takes place;the clot being arranged at the circumference of the swelling, and thefluid portion occupying the centre. It is most important that this bedistinguished from acute abscess; for it requires very different treat-ment There need be no difficulty. The one is immediate, the other. Bruise of the scrotum; a form ofHcematocele. 652 TREATMENT OF BRUISE. of secondary formation ; the abscess is necessarily preceded and attendedby all the usual symptoms of inflammation, the other is not. The sameprocess of decadence takes place, as in ordinary bruise ; swelling ceases;discoloration becomes marked and varied; extravasation, both solid andfluid, is absorbed; and ultimately, the normal color 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 accession, to promote absorption of extravasationand exudation, and to restore function. Rest, fomentation, antiphlo-gistics when required; followed by friction, support,
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