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The practice of endotracheal anesthetization not infrequently imposes two problems: easy insertion of the tube, for which exact control of the distal end of the tube is needed and is rarely provided, and the leaking inflatable cuff. In an attempt to solve both problems, I offer two devices, the threaded endotracheal tube and the double-cuff endotracheal tube.
Threaded Endotracheal Tube
With the use of a simple paper-punch, a small hole is made near the end of the tracheal tube, and a strong thread is passed through the hole. The anesthesiologist then holds the tube in the usual manner and manipulates the thread with two fingers. In this way, the sharp upward curve at the end of the tube and the precise control of the tube, both so necessary to tracheal intubation, are obtained. Care must be taken that the thread does not injure tissues anterior to it. The thread can
Cole F. TWO NEW MODIFICATIONS OF THE ENDOTRACHEAL TUBE. JAMA. 1957;165(2):149-150. doi:10.1001/jama.1957.72980200001009