. Diptheria, its nature and treatment . Fig. 22.—Double Trachea Tube. Movable Plate. Silver. The opening of the trachea is announced by the escape ofair. Fragments of false membrane sometimes present them-selves at the opening and are coughed out, or may be extractedby forceps. It is often advisable, before introducing the can-. Fig. 23.—Trousseaus Dilator. nula, to excite coughing by inserting a feather downward intothe trachea, that blood, mucus or fragments of false mem-brane may be expelled. 1 Dr. J. A. Wyeth: A Text Book on Surgery, p. 453. 252 DIPHTHERIA; ITS NATURE AND TREATMENT. The ca
. Diptheria, its nature and treatment . Fig. 22.—Double Trachea Tube. Movable Plate. Silver. The opening of the trachea is announced by the escape ofair. Fragments of false membrane sometimes present them-selves at the opening and are coughed out, or may be extractedby forceps. It is often advisable, before introducing the can-. Fig. 23.—Trousseaus Dilator. nula, to excite coughing by inserting a feather downward intothe trachea, that blood, mucus or fragments of false mem-brane may be expelled. 1 Dr. J. A. Wyeth: A Text Book on Surgery, p. 453. 252 DIPHTHERIA; ITS NATURE AND TREATMENT. The cannula may be introduced by using the nail of theleft index-finger as a guide into the tracheal incision, or bythe aid of the dilator. Difficulties in doing this should beovercome by repeated gentle efforts, but never by force. A rapid operation is practiced and described by Sarnie,1and advocated by The trachea is grasped by itssides at the level of the thyroid cartilage, between the thumband middle fingers of the left hand, while the index-finger ofthat hand finds the cricoid cartilage, the finger-nail beingplaced upon its lower border. This hand must not be removeduntil the cannula has been inserted. The incision having been made through the skin downwardfrom the point indicated by the finger-nail, a few add
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