A Multiple-diameter Bougie Fitted over a Small-caliber Fiberscope

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Abstract
New instruments for dilatation of the upper gastrointestinal tract are described: 1. A hollow plastic bougie with an inside diameter of approximately 10 mm to allow a 9 mm endoscope to pass. The diameter of this tube-like bougie increases in four steps up to 16 mm. 2. A second-similar bougie employs a flexible bronchoscope for guidance of the bougie. This system permits bougienage from 4 to 11.5 mm. The system permits stepwise bougienage of stenoses using only two instruments. For the first time complete endoscopic control of bougienage is possible.

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