Surgical and medical apparatus and instruments; apparatus and instruments for use in anaesthesia; apparatus and instruments for use in ventilation of the lungs; apparatus and instruments for use in intubating procedures; apparatus and instruments for use in tracheotomy procedures; tracheal tubes; endotracheal tubes; tracheostomy tubes; devices for controlling and monitoring cuff pressure or tracheal seal on tracheal tubes; tracheal tube cuff pressure or tracheal seal control and monitoring devices with audio sensors for use in tracheotomy procedures; parts and fittings for the aforesaid goods