The legal requirements for clinical trials with medical devices are changing. In the course of adapting Swiss legislation to the new EU Medical Device Regulation (MDR), clinical research with medical devices (with the exception of in vitro diagnostics) in Switzerland will be regulated in a separate ordinance. The new "Medical Device Regulation" (ClinO-MD) will come into force on 26.5.2021, at the same time as the MDR.
You can find more detailed information here.