Stethoscopes for diagnostic medical tests comprised of a bodily sound detection sensor, an interchangeable headset and speaker unit for listening to bodily sounds, a rechargeable battery, a broadband wireless Internet connection, a USB port, an oxygen saturation sensor, control buttons and a touch screen display, an ultrasonic probe, a light source and one or more electrocardiogram electrodes or sensors but not including catheters for delivery of drugs or fluids and controllers and power unit...