Most medical devices have a serial interface which can be used to read data from those medical devices. To do this, e.g. Dräger Medical developed a data bus, the so-called Medibus, which makes measured values, real-time curves, set values, and alarms available. This data bus is “public” and is usually employed for the purpose of connecting additional monitors for data transfers or for data management systems.
Generally speaking, Medibus is unidirectional, which means that external device control is not intended. Depending on the device and the software version of the medical device, various data is available. The amount of data available is usually larger the higher the software version of the medical device is. The devices transfer your name and software version via Medibus so that a connected PC knows the extent of the data.
Additional information on this topic can be found in the corresponding Instructions for Use for the device.
From the perspective of the medical device, Medibus is passive meaning that all necessary information must be obtained by “inquiry”. During recording MedLink, regardless of its configuration, saves all available data except real-time curves so that you can obtain all information after the recording has been completed.
The serial interface used (RS232) has a limited transmission rate; this limits the medical devices to transmitting only 2 or 3 real-time curves at a sampling rate of 16 ms/20ms.
Communication interruptions between a connected PC and the medical device are always accompanied by a warning [displayed] on the medical device; the message “COMM ERR!” or something similar usually appears on the screen. For further details, consult your Instructions for Use.
Note: Please pay attention to the advisories concerning connecting medical devices to your PC since the devices have differing plugs and pin assignments:
Establish the connection between the PC and the Dräger device via the serial interface RS232!