. A treatise on surgical therapeutics of domestic animals. Veterinary surgery; Therapeutics, Surgical. 8o VETERINARY SURGICAL THERAPEUTICS. cauterizing edge must be slightly convex, blunt throughout its whole extent, rounded at its angles ; and its rod would better be moderately rounded in. With such instruments the uneven parts. of the region can be well followed, and the heat evenly distributed. The active part oipoint cautery (fig. 37) is disposed in a conical fofrri more or less elongated; it varies in size. For penetrat- ing or deep pointed firing, a, . cautery more elongated than the pre
. A treatise on surgical therapeutics of domestic animals. Veterinary surgery; Therapeutics, Surgical. 8o VETERINARY SURGICAL THERAPEUTICS. cauterizing edge must be slightly convex, blunt throughout its whole extent, rounded at its angles ; and its rod would better be moderately rounded in. With such instruments the uneven parts. of the region can be well followed, and the heat evenly distributed. The active part oipoint cautery (fig. 37) is disposed in a conical fofrri more or less elongated; it varies in size. For penetrat- ing or deep pointed firing, a, . cautery more elongated than the preceding is used. Abadie' has recommended an instru- ment with which he could . run through the subcutaneous connective tissue and deep into the tissues. When one does not wish to go beyond . the subcutaneous connective tissue, ordinary cauteries more or less elongated an- swer all purposes. Needle' Cauterisation requires very fine needles which can penetrate all tissues. At first iron need- les, 2 millimeters in diameter, and one or two decimeters- long, were used ; heated to red heat, they were taken hold of with nippers and implanted in the tissues. Bianchi, Lenck, Foucher, have recommended cauteries having an olivary part, terminated by a point of iron or pla'tinum. The most of those in- struments with a separate needle cool off too quickly and burn the skin round the perforation. To protect the skin, Watrin had a little disk of metal placed between the needle and the olivary part of the cautery. Bourguet(fig. 38), Vasselin, Hermann, and Ehret have invented the first cauteries with movable needles and independent heating. That of Bourguet is superior to all others, and we use it often at. Alfort, with best results. A screw (A) regulates the penetration of the needle, which is heated in the interior of the heat carrier, a slight pressure from downwards upwards upon the branch F pushes It out; as soon as it is removed from the tissues, it is allowed to return to the heating mas
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