A system of surgery . lymph and amongst the pus corpuscles which cover thesurface of such septic wounds are various kinds of micrococci. Inthe specimen shown in Fig. 30, cocci, diplococci, staphylococci, andstreptococci could all be discerned, as well as numerous bacilli. Thepatient died of pyaemia after amputation of the breast. The tissues around the wound when microscopically examined arecedematous and hyperaemic, and infiltrated with purulent materials. 2. The condition of the vessels. — The lymph paths inthe vicinity of the lesion are choked with pus corpuscles, amongstwhich are many bact
A system of surgery . lymph and amongst the pus corpuscles which cover thesurface of such septic wounds are various kinds of micrococci. Inthe specimen shown in Fig. 30, cocci, diplococci, staphylococci, andstreptococci could all be discerned, as well as numerous bacilli. Thepatient died of pyaemia after amputation of the breast. The tissues around the wound when microscopically examined arecedematous and hyperaemic, and infiltrated with purulent materials. 2. The condition of the vessels. — The lymph paths inthe vicinity of the lesion are choked with pus corpuscles, amongstwhich are many bacteria, especially streptococci. It is easy tounderstand that chains of cocci are more adapted to pass alongnarrow lymph paths than the more bulky masses of lymphatics, however, are not the main channel by which thecocci invade the blood. As is well known, the lymphatic glandsact as filters and prevent their onward progress. The veins, onthe other hand, play a most important part in pyaemia, and are. Kg. 30.—Section of the Tissues of a Wound whichcaused Pyaemia. (From a micro-photograph byMr. Cosens.) THE ABSCESSES. 177 the channels by -which the blood is usually invaded. The smallerveins near the seat of infection are filled with thrombi, which consistof fibrin, and of white and red blood corpuscles (many of which aredisintegrating), and of bacteria. Their endothelial lining is in a stateof proHferation, and the surrounding tissues contain many septic phlebitis affects the larger veins, they are distended andof a dark purple colour. Their adventitia may be inflamed andstained with blood pigment, and sometimes abscesses are foundalong their course. Their walls are thickened and their interior isrough, denuded of endothelium and coated with fibrin. The septicor infected thrombus usually begins at the wound, or infectingfocus, and extends as far as the nearest valve, or into the nearestgreat trunk. Here its softened end may float in the blood-s
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