On June 23rd, 2020 the 1st amendment of IEC 62366-1 was published as IEC 62366-1 Amd.1 Ed.1.0. After the first improvement with the corrigendum in 2016, the amendment has now been published with additional updates. References to other norms and standards have been adjusted, such as the new ISO 14971:2019 and the ISO 13485:2016. In addition to the streamlining of some definitions and several paragraphs in chapter 5, the analysis of the results of the summative evaluation in chapter 5.9 also needs to consider so-called "Use Difficulties". The term includes close calls, but also situations in which problems in use have been observed by the moderator or expressed by the participant, but no use error is committed. However, the term is not included in the list of the terms and definitions in chapter 3 of the standard. In addition, annex E has been completely revised with the reference to the essential requirements of MDR 2017/745.