Apparatus for artificial respiration; Breath gas analyzers for medical diagnostics; Inhalers for medical use; Medical apparatus for diagnosing or treating respiratory conditions; Medical apparatus for diagnosing or treating respiratory conditions, namely, respiratory aspirators; Medical instruments and devices, namely, external fixators; Medical intubation equipment; Nasal aspirators; Oxygen concentrators for medical applications; Oxygen concentrators for medical purposes; Oxygen monitors for medical use; Patient breathing system comprising a breathing circuit, connections to patient, ventilator, scavenger, fresh gas delivery circuit and carbon dioxide absorber; Physical exercise apparatus, for medical purposes; Portable medical devices used for breathing exercises, namely, portable devices used for endogenous breathing exercises and for respiratory muscle training; Medical apparatus, namely, respiratory equipment and monitors therefor