Respiration monitors; Heart rate monitors; Oxygen monitors for medical use; Medical apparatus and instruments for monitoring blood oxygen saturation, blood gas concentrations, vital signs and respiratory events; Electrocardiographic (ECG) recorders; Electrocardiographs; Heartbeat measuring apparatus; Computerized medical recording and analysis apparatus for the diagnosis and treatment of arrhythmias; Breath gas analyzers for medical diagnostics; Body composition analyzers for medical purposes; Medical instruments for measuring and displaying cough, respiration, and lung sounds; Medical diagnostic apparatus for testing cough, respiration, and lung sounds incorporating recorded operating system software; Medical apparatus and instruments for monitoring blood pressure, blood sugar, and other physiological conditions; Medical apparatus and instruments for monitoring physiological parameters; Medical apparatus and instruments for monitoring physiological conditions; Medical apparatus and instruments for monitoring heartbeat and breathing