Medical apparatus, namely, diagnostic apparatus consisting of mask-cushions, air chambers, adjustable head support, head bands in the form of cushions, tube and elbow with gas connector for the use in connection with non-invasive ventilation; therapeutic apparatus consisting of mask-cushions, air chambers, adjustable head support, head bands in the form of cushions, tube and elbow with gas connector for the use in connection with lungs and bronchial dysfunctions