Patent ID: 9072858
Filing Date: 2015-07-07
Classification: A61M

Abstract:
1. A system comprising a plurality of outer tracheal tubes of different characteristics and a plurality of different inner tubes arranged to be insertable within and removable from respective ones of the outer tubes, the inner tubes having a machine end fitting and a shaft adapted to extend forwardly from the machine end fitting along the length of the respective outer tubes, wherein the machine end fittings of outer tubes of different characteristics are different from one another, wherein the machine end fittings of the different inner tubes are different from one another such that the machine end fittings of the inner tubes can only be fully inserted in machine end fittings of the outer tubes of a corresponding characteristic, wherein the machine end fitting on each outer tube has an inner surface of circular section interrupted by two or more flats spaced from one another, that the disposition of the flats is different on tubes of different characteristics, wherein the machine end fitting on each inner tube has an outer surface of circular section interrupted by two or more flats, and wherein the disposition of the flats is different on inner tubes of different characteristics such that they align only with the flats on the fittings of outer tubes of the corresponding characteristic.