This International Standard specifies a method of testing the continuous wave (cw) laser resistance of all parts of the cuff region of a tracheal tube and is applicable to tracheal tubes which are designed to resist ignition by a laser. Other components of the system, such as the inflation system and shaft (as defined in Part 1 of this International Standard), are outside the scope of this International Standard.NOTE 1 The method for testing the laser resistance of the tracheal tube shaft is in the scope of ISO 11990, which will become Part 1 of this International Standard.The specified test method shall be used to measure and describe the properties of mat