. Practical electricity in medicine and surgery. batteryor by two cells of any good cautery battei*y. If, on the otherhand, a loop of Avire eight or ten inches long is to be heated,the resistance is very much increased, and a higher voltage ELECTRODES FOR GALVANO-CAUTERY. 245 (electro-motive force) would be requisite to overcome it, and toallow the current to produce the heating effect. It will be clear,then, at once to the reader that the mere possession of a cauteryoutfit will not insure success in any operation undertaken,unless the possessor has the requisite knowledge to use itproperly. C
. Practical electricity in medicine and surgery. batteryor by two cells of any good cautery battei*y. If, on the otherhand, a loop of Avire eight or ten inches long is to be heated,the resistance is very much increased, and a higher voltage ELECTRODES FOR GALVANO-CAUTERY. 245 (electro-motive force) would be requisite to overcome it, and toallow the current to produce the heating effect. It will be clear,then, at once to the reader that the mere possession of a cauteryoutfit will not insure success in any operation undertaken,unless the possessor has the requisite knowledge to use itproperly. Cautery electrodes consist of two parts, the cautery properand the holder or handle. Most outfits are now furnished withwhat is known as a Universal handle, to which most of thecautery points can be attached. Fig. 213 shows such a combi-nation handle, with ratchet-wheel to shorten the wire loop as itcuts, or rather bums, its way through the tissues. Immediatelybelow are given illustrations of a large variety of burners,knives, points, and Fig. 214.—Large Cautery Handle. Where large masses are to be removed, as in amputationof the cervix uteri, a handle with an ecraseur screw is used toshorten the wire, which passes through two conducting 21-1 illustrates this large handle. OTHER ELECTRICAL INSTRUMENTS FOR SURGICAL PURPOSES. For the rapid and accurate trephining and sawing of bones,and burring or rimming out exostoses, various instruments, inwhich electricity is used as the motive power, have been devisedby surgeons and dentists. It would take up too much space todescribe these in detail in this work. Attention may, however,be directed to the ingenious and elaborate development of theelectro-motor in surgery, made by Dr. M. J. Roberts, of NewYork, in his electric osteotome.* * Inteniational Journal o£ Surgery and Antiseptics, January, 1888. 24G PRACTICAL ELECTRICITY IX MEDICINE AND FOR APPLYING STATIC ELECTRICITY. The principles of static
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectelectri, bookyear1890
