Gas monitoring lines are often the cause of a significant leak; check that they are properly attached and any sampling ports not in use have been blanked off. To eliminate the need to change the sampling line repeatedly, the gas monitoring line should be assembled as an integral part of the breathing circuit by attaching it proximal to the patient breathing filter. Airway equipment These include bacterial filters, catheter mounts, connectors and tracheal tubes, laryngeal mask airways, etc.; check that these are all available in the appropriate sizes, at the point of use, and that they have been checked for patency
