To overview: Medical investigations Based on MDR / MPDG Re­quest for au­tho­ri­sa­tion No­ti­fi­ca­tion of the Put up-Mar­ket Clin­i­cal Fol­minimal-up in­ves­ti­ga­tion No­ti­fi­ca­tion of oth­er clin­i­cal in­ves­ti­ga­tions Sub­stan­tial mod­i­fi­ca­tions Halt, Ter­mi­na­tion or Stop of the Clin­i­cal In­v