Capnography apparatus for medical use; respiratory apparatus for use in surgery and intensive care; respiratory gas mixing apparatus for medical use; medical apparatus, namely, invasive and non-invasive ventilation apparatus and instruments; breathing tubes used in the delivery of air and gases to and away from patients; cannulae; nasal cannulae; cannula for respiratory purposes; respiratory sensor apparatus for medical use to detect gases; breathing tubes and nasal tubes for medical or surgical use; tubing connectors for use with medical or surgical respiratory equipment; tubing connectors for use with medical or surgical breathing tubes and nasal tubes; facial masks, oral masks, nasal masks, nasal interfaces for masks and mouthpieces, all being for medical and surgical purposes; parts and fittings for all the aforementioned goods