A system of surgery : theoretical and practical . ed with perfect success. Fig. 155.—Mackenzies Laryngeal Forceps. 3. For the removal of laryngeal growths by the Wire Snare it is necessary toemploy a slender and appropriately curved instrument carrying a wire loop, whichcan be quickly and easily drawn home when once it has been made to encircle thegrowth. The insti-ument successfully used by Dr. Walker of Peterborough in the firstcase in which a laryngeal growth was removed from the larynx during life in thiscountry, was a modification of Goochs double But the double tube is cum-bers
A system of surgery : theoretical and practical . ed with perfect success. Fig. 155.—Mackenzies Laryngeal Forceps. 3. For the removal of laryngeal growths by the Wire Snare it is necessary toemploy a slender and appropriately curved instrument carrying a wire loop, whichcan be quickly and easily drawn home when once it has been made to encircle thegrowth. The insti-ument successfully used by Dr. Walker of Peterborough in the firstcase in which a laryngeal growth was removed from the larynx during life in thiscountry, was a modification of Goochs double But the double tube is cum-bersome and altogether unnecessary. Gibbs Laryngeal Ecraseur ^ is a far moreperfect instrument—indeed, nothing could be better adapted for its purpose, unlessit be some such modification as that suggested by Dr. George Johnson.^ Theseinstruments bear a general resemblance in construction and mode of working toWildes Aural Polypvis Snare, and Hiltons Nasal Polypus Snare; but they ai-e, of Fig. 15G.—Laryngeal Forceps, opening course, difierent in shape and more slender. In using this instrument the wire loopis made to encircle the growth, and then pulled tightly home. The giowth is thenforcibly pulled or twisted from its attachment, and, as a rule, is brought away in theloop. This method is stiongly advocated by Sir D. Gibb,^ and Dr. George Johnson.^It is especially applicable in cases in which the growths project in such manner anddirection as to render them easily caught, and in which they are soft or pliable intexture, and not very large. Dr. Mackenzie has, however, pointed out the possi-bility of the wire being displaced, and thus missing the growth. He has devised andsuccessfully used a wire snare concealed in a loop of metal, which can be slowlytightened by means of a cog-wheel turned by the index-finger. Professor Stoerk was ^ Op. cit. p. 114. ~ S(^ Lancet, November 9, 1861, p. 444. ^ Made by Weiss ; see Gibb. Op. cit. p. 138. ^ See Transactions Roya
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