TECHNIQUE OF VENTILATION DURING ENDOLARYNGEAL SURGERY UNDER GENERAL ANESTHESIA

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Abstract
Summary Adequate pulmonary ventilation can be obtained in completely relaxed patients under intravenous general anaesthesia by applying the injector principle directly to the human trachea. A jet of oxygen is introduced into the traches by a transtracheal approach, using a 14- or 16-gauge plastic intravenous cannula or by the nasotracheal route, employing a long polyethylene tube corresponding to a 15-gauge intravenous cannula. The latter technique is preferred for routine procedures. Intermittent interruption of jet flow with a Bird Mark II ventilator provides intermittent positive pressure ventilation. The theoretical basis for this technique is outlined and anaesthetic procedure is described. For microscopic endolaryngeal surgery, this approach provides excellent conditions, imposing no restrictions on the operative field or on the duration of surgery.

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