Special new low resistance to flow tube and endotracheal tube adapter for use during fiberoptic bronchoscopy.

This paper describes endotracheal tubes and adapters which are designed specially for fiberoptic bronchoscopy; the tubes are designed in such a way that they are wide at the upper part but are narrow and thin walled in the part of the tube which goes through and below the cords. By designing tubes in this manner, the resistance to flow of gas through the tube when the fiberoptic bronchoscope is in place is very much reduced and the safety of the whole precedure is enhanced. A special adapter for use under these circumstances is also described which utilizes a commercially available swivel tracheostomy adapter with a special silicone diaphragm fitted onto the top to enable the fiberoptic bronchoscope to be placed through the diaphragm and keep a sealed system. A plug is available for the hole in the diaphragm when the fiberoptic bronchoscope is not being used. Clinical and laboratory data show that these pieces of equipment perform the function for which they were designed.