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To the Editor:—Dr. Kristensen has concluded that during intubation with the use of a flexible fiberscope, the use of the Parker Flex-Tube results in a significantly lower rate of repositioning and repeated attempts at passing the tube into the trachea, compared to a standard endotracheal tube. We believe it would be more appropriate to conclude that the Parker tube is better only when the standard tube is improperly oriented during passage. Dr. Kristensen reported that once the standard tube was rotated counterclockwise by 90 degrees, its success rate improved to 26 out of 38 attempts. This was essentially the same as the success rate (27 out of 38 attempts) of the Parker tube and is consistent with our experience with the standard tube. Why not simply start with the standard tube rotated counterclockwise by 90 degrees? The Parker tube requires a higher cuff pressure, which, in our opinion, makes it less desirable. The simple technique of rotating the standard tube counterclockwise by 90 degrees during the first attempt along a fiberoptic bronchoscope has been our standard practice for years, thanks to a suggestion by Katsnelson et al. in 1992. Eighteen years ago, Cossham proposed rotating a standard tube counterclockwise by 90 degrees to facilitate passage along a gum-elastic bougie, and in 1990, Dogra et al. demonstrated convincingly the usefulness of this technique. Granted, this technique may not be widely appreciated, perhaps because the gum-elastic bougie is not used in some parts of the world and the use of fiberoptic bronchoscopy is infrequent. As such, Dr. Kristensens’study should help to popularize this important “trick.”

Is the Parker Flex-Tip Tube Really Superior to the Standard Tube for Fiberoptic Orotracheal Intubation?