Hematimeters; Blood oxygen monitors; Medical apparatus and instruments for monitoring blood oxygen saturation, blood gas concentrations, and vital signs; 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; Medical apparatus and instruments 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 oxygen saturation, blood gas concentrations and vital signs; 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; Medical devices 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; 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, namely, pulse oximeters; Pulse oximeters for medical purposes