The authors of the paper carry out a preliminary assessment of the new regulation on clinical trials of medical devices in the context of software based on intelligent algorithms (so-called AI systems). The primary source of law here is the EU Medical Device Regulation (MDR). The study highlights the need to take into account the regulations on artificial intelligence systems when conducting clinical trials. It is justified by their close relationship with the EU provisions on medical devices. The main difficulty in making a legal and ethical assessment of new solutions used in medical devices is the application of various, sometimes divergent, regulations in the field of new technologies and medical law. The study contains preliminary, necessarily balanced and careful, bearing in mind the need to protect patients - research participants (and other people), conclusions on the application of the above provisions in the conduct of clinical trials.