The principles of surgery . as to insure ablation of all the tex-ture prone to renewal of ulceration, and incapableof repair. Escharotics in some cases are employed; asfor example, when the patient resolutely objectsto any other mode of removal. Or when cuttinginstruments have been used, and yet a border ofsuspicious character remains, the extinction ofsuch a suspected part may sometimes be conve-niently enough intrusted to cauterization. Theactual cautery may be applied ; but unwisely. Iteffects too much. The carious part is at onceFi-. 124. Gouge. Suitable and satisfactorily killed; but, as
The principles of surgery . as to insure ablation of all the tex-ture prone to renewal of ulceration, and incapableof repair. Escharotics in some cases are employed; asfor example, when the patient resolutely objectsto any other mode of removal. Or when cuttinginstruments have been used, and yet a border ofsuspicious character remains, the extinction ofsuch a suspected part may sometimes be conve-niently enough intrusted to cauterization. Theactual cautery may be applied ; but unwisely. Iteffects too much. The carious part is at onceFi-. 124. Gouge. Suitable and satisfactorily killed; but, as in all severe burns, *J texture immediately surrounding the eschar,tin? bone-pRera; commonly though escaping with life, has its vitality very muchcalled i,istoa-s forceps; shut; impaired, and is more prone to disintegration than for dividing the diseased bone • mv • i . £ . , -aS in resection of carious repair. llie potential cautery is infinitely pre-j°iuls- ferable. It destroys the diseased part just as. TREATMENT OF CARIES. 387 effectually, though perhaps with less rapidity; and at the same timethe immediately adjoining parts do not in anywise suffer, but atonce institute a healthful line of demarcation for removal of thedead part, and are well able to commence at the same time a sthenicprocess of repair. The preferable forms of potential escharotic arethe red precipitate of mercury in powder, and the chloride of zincmade into a paste ; the latter is the more generally useful. Applicationis made with intensity deemed sufficient to insure death of all the sus-pected part; and the escharotic is then removed. The whole wound isfilled gently with lint; and such dressing is continued, covered perhapsby a poultice to mitigate vascular excitement until separation of theeschar has occurred. The bones surface is then treated as a simpleulcer ; with two paramount objects in view—speedy healing of the sore,so as to obviate degeneration ; and a healing from the botto
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