To the Editor.— Dr. Renz and associates deserve congratulations for their ingenious method of maintaining ventilation during bronchoscopy with a flexible fiberoptic bronchoscope (219:619,1972). The author has used a similar technique which may be somewhat simpler. Technique.— A Rovenstine 90° elbow connector is interposed between the endotracheal tube of the patient and the mechanical ventilator. It has a 6.5 mm suction channel which barely allows the passage of a 5 mm bronchofiberscope (Figure). Bronchoscopy and suction are carried out through this channel while ventilation is maintained. A small leak occurring around the shaft of the bronchoscope is easily compensated by appropriate adjustments on the ventilator. Anesthetic elbow connectors with a wider suction channel has also been used. A rubber diaphragm cut from a piece of glove or penrose drain is taped over the suction channel and a 3 to 4 mm slit is made in its middle. The diaphragm