@HistoPol Scan done and back in waiting room. Went well. Had a conversation with the CT operator about how the note about my allergy only appears in the database for this hospital and if I go somewhere else they may not have access to this info.
This is sadly the state of healthcare in Sweden, and many other countries of course - that the different IT systems don't talk to each other. There's a lot of things to keep track of and report yourself, some of them life critical.
Like the yellow card for vaccinations I would really like to see a small booklet (or other solution) that a patient can carry with them for all this important info. Obviously there are risks with this as well, but it's design challenge I would be interested in tackling.