A manual of modern surgery : an exposition of the accepted doctrines and approved operative procedures of the present time, for the use of students and practitioners . g sound, due to the presence in thetissue of the gases generated by putrefactive decomposition. Thegases, which are principally sulphuretted hydrogen, ammonia, and car-bonic acid, cause great local emphysema and puffiness of the parts, andwith the other products, such as butyric acid, give the characteristicodor of putrefaction. The red streaks along the course of the vesselsin the incipiency of gangrene, and the deep color of t
A manual of modern surgery : an exposition of the accepted doctrines and approved operative procedures of the present time, for the use of students and practitioners . g sound, due to the presence in thetissue of the gases generated by putrefactive decomposition. Thegases, which are principally sulphuretted hydrogen, ammonia, and car-bonic acid, cause great local emphysema and puffiness of the parts, andwith the other products, such as butyric acid, give the characteristicodor of putrefaction. The red streaks along the course of the vesselsin the incipiency of gangrene, and the deep color of the parts duringits existence are due to the transuded coloring matter liberated by thedestruction of the blood corpuscles. In dry gangrene the appearance of a small brown or black spot,especially upon the toes, where the affection is most frequently seen, isoften the first sign of disease ; though at times cramps and stinging 54 DESTRUCTIVE INFLAMMATORY PROCESSES. pain and feeble local circulation are premonitory symptoms. Thediscolored point, instead of being brown, may be a mottled white, andsometimes a vesicle forms at the beginning of the disease. The dark-. Chronic dry gangrene of arm. ened area becomes blacker and slowly extends with very few accom-panying inflammatory symptoms. The dead tissue is dry, withoutoffensive odor, and gradually becomes shrivelled and hard. The lossof sensibility and the lowered temperature of the dead tissue presentin moist gangrene, of course, exist here. This form of mortification isfrequently called senile gangrene, but improperly so, since it may occurfrom chronic ergotism without reference to the patients age, and be-cause moist gangrene may occur in the aged in similar regions of thebody. In all forms of mortification, if the patient survive long enough, thedead tissues are separated by the process of ulceration from those whosevitality resists the destructive influence. The living structures becomereddened at the line of junction with th
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