Medical apparatus and instruments; medical apparatus for supporting nasal and oral ventilation; medical apparatus for investigating, monitoring, analysing, diagnosing or recording air flow and composition, pressure, volume and respiration including portable monitoring apparatus; medical testing apparatus and instruments; medical apparatus and instruments for testing temperature, patient oxygen saturation, pressures of respiratory gases and concentration of respiratory gases; sleep apnea monitors; apparatus for the control and supply of medical gases; medical apparatus and instruments for continuous positive airway pressure (CPAP) therapy; nasal continuous positive airway pressure units; humidifiers and meters for positive pressure therapy, medical apparatus for breathing purposes; apparatus for the identification and treatment of breathing difficulties; medical ventilation apparatus and instruments including ventilators; peep activators being parts of medical ventilators for maintaining pressure; ventilation apparatus and instruments; breathing masks; facial masks, oral masks, nasal masks, nasal cannula, mouthpieces, headgear, all being for medical purposes; air filters (parts of medical apparatus); parts and fittings for all the aforementioned goods