Medical apparatus for diagnosing or treating respiratory conditions; Medical devices for monitoring blood oxygen saturation, blood gas concentrations, respiratory events, and vital signs, and also featuring a system consisting of computer hardware for transmitting monitored data through the Internet, as a component of the medical devices; Medical devices for monitoring blood oxygen saturation, blood gas concentrations, vital signs and respiratory events, and recorded software for recording, processing and transmitting medical data, for use therewith, sold as a unit; Medical devices for monitoring blood properties and respiratory events; Medical devices for use in diagnosing cardiovascular and respiratory activities and irregularities; Medical devices for use in diagnosing sleep patterns and rhythms; Medical devices for use in diagnosing respiratory conditions; Medical devices for use in diagnosing Tachycardia, Bradycardia, and Atrial Fibrillation; Medical devices for use in diagnosing blood oxygen saturation, heart murmurs, blood gas concentrations, vital signs and respiratory events; Medical instrument for cardiovascular diagnostics; Medical apparatus and instruments for monitoring blood oxygen saturation, blood gas concentrations, vital signs and respiratory events; Medical apparatus and instruments for monitoring blood oxygen saturation, blood gas concentrations, vital signs and respiratory events, and downloadable software for recording, processing and transmitting medical data, for use therewith, sold as a unit; Stethoscopes