The practice of surgery . ite of[Fig. 118.] the wound ; accordingly, a curved silver canula is intro-duced ; and this is retained by tapes passing from a ringon each side of the canula, to be secured behind the canula is of sufficient size to atone, completely, forthe temporarily occluded rima; varying, consequently,according to age; and, generally, of not much less diame-ter than the trachea which receives it. Yet it should notbe so large as to press harshly on the lining membrane ofthe passage, lest ulceration be induced. The woundshould be of size sufficient to receive the canula,
The practice of surgery . ite of[Fig. 118.] the wound ; accordingly, a curved silver canula is intro-duced ; and this is retained by tapes passing from a ringon each side of the canula, to be secured behind the canula is of sufficient size to atone, completely, forthe temporarily occluded rima; varying, consequently,according to age; and, generally, of not much less diame-ter than the trachea which receives it. Yet it should notbe so large as to press harshly on the lining membrane ofthe passage, lest ulceration be induced. The woundshould be of size sufficient to receive the canula, withoutforce, and yet not too freely ; the cut margins should becompressed by the canula, internal escape of blood beingso prevented; and this object is farther contributed to bythe conical form of the instrument. To facilitate intro-duction, the canula may be provided with a plug, thebulbous end projecting—as in the vaginal speculum ; an Fig. 119. [Instrument ofM. Garin for open-ing tlio Trachea.(From Fergusson.) -Ed.]. Ordinary Canula. a. In profile; b. Transverse section of orifice. idea for which we are indebted to Dr. W. T. Gairdner. The patient islaid on his side, so as to render the wound dependent and favorable tothe outward escape of blood and mucus. After a time, when the coni-cal form of the tube is no longer an advantage, on account of hemor- TRACHEOTOMY. 279 rliage, an instrument of uniform caliber may be substituted, as moresuitable for respiration. And in cases of old standing—more especially Fig. 120.
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Keywords: ., bookcentury1800, bookdec, booksubjectsurgicalproceduresoperative
