ISO 18190:2016 Clause 1 is replaced by the following This document specifies essential performance and safety requirements for cuff pressure indicator devices used to indicate the intracuff pressure of airway devices. Such devices are primarily designed to indicate the intracuff pressure of airway devices, such as supralaryngeal airways, tracheal tubes or tracheostomy tubes. This standard is also applicable to devices that combine intracuff pressure indication with a method of cuff inflation (such as a syringe or pump). The device may also provide a method of automatically maintaining cuff inflation at a specific pressure or within a pressure range.