The Nexfin device is safe, convenient, and reliable in measuring continuous non-invasive arterial pressure but not interchangeable with transpulmonary thermodilution to monitor CI.

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The work presented here is only a part ofthe development for a new current-controlled defibrillator. In the diploma thesis "'Development and construction of a current-controlled defibrillator for clinical tests" the most important part was the control and safety ofthe defibrillator. To ensure a safe circuit design, a nsk-analysis and a Failure Mode and Effects Analysis (FMEA) were necessary. Another major part was the programming of a microcontroller in embedded C and a programmable logic device in Very High Speed Integrated Circuit Descnption Language (VHDL). The circuit had to be constructed, and the defibrillator was optically decoupled from the laptop for safety reasons. The waveform-data can be transmitted to the microcontrollerfrom the laptop, and the logged data is then transmitted back.