scope:

This International Standard is one of a series dealing with anaesthetic equipment and medical breathing machines, and specifies the basis requirements for the more commonly used types of trachael tubes, whether made of rubber or of other elastomeric material. Tubes with walls reinforced with metal or nylon, tubes with shoulders (except for those in ISO 5361-4), tapering tubes, or the many types of special tubes devised for use in thoracic surgery, are not specifically covered although most may have the size designated by the inside diameter as required by this specification.